JP4879536B2 - COMPOSITE BOARD, MANUFACTURING METHOD THEREOF, AND ELECTRONIC DEVICE - Google Patents

COMPOSITE BOARD, MANUFACTURING METHOD THEREOF, AND ELECTRONIC DEVICE Download PDF

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JP4879536B2
JP4879536B2 JP2005265640A JP2005265640A JP4879536B2 JP 4879536 B2 JP4879536 B2 JP 4879536B2 JP 2005265640 A JP2005265640 A JP 2005265640A JP 2005265640 A JP2005265640 A JP 2005265640A JP 4879536 B2 JP4879536 B2 JP 4879536B2
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wiring
wiring board
substrate
composite substrate
board
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敏 山本
伸行 定方
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Fujikura Ltd
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Description

本発明は、電子デバイスや光学デバイス、MEMSデバイス等の高密度実装、またはそれらのデバイスを一つのパッケージ内でシステム化するSiP(System in Package) を可能にする貫通配線を備えた配線基板を複数用いて重ね合わせてなる複合基板及びその製造方法、並びに電子装置に関する。   The present invention provides a plurality of wiring boards having through wirings that enable high-density mounting of electronic devices, optical devices, MEMS devices, etc., or SiP (System in Package) for systematizing these devices in one package. The present invention relates to a composite substrate formed by superposition, a manufacturing method thereof, and an electronic device.

近年、携帯電話機等の電子機器の高度化に伴い、それらに使われる電子デバイス等にも更なる高速化、高機能化が要求されている。これを実現するためには、微細化等によるデバイス自身の高速化だけではなく、デバイスのパッケージにも高速化、高密度化に向けた技術開発が必須となっている。
高密度実装を実現する技術として、微細な貫通電極を用いてチップを積層実装する3次元実装や、貫通電極が形成された配線基板を用いたSiPが提案されており、これを実現するための貫通電極形成技術や配線基板の形成技術が活発に研究、開発されている。
In recent years, with the advancement of electronic devices such as mobile phones, electronic devices and the like used for them are required to have higher speed and higher functionality. In order to realize this, not only the speed of the device itself by miniaturization and the like, but also the development of technology for the speed and density of the device package is indispensable.
As a technique for realizing high-density mounting, three-dimensional mounting in which chips are stacked and mounted using fine through electrodes and SiP using a wiring substrate on which through electrodes are formed have been proposed. Through-electrode formation technology and wiring board formation technology are actively researched and developed.

図24は、セラミックやシリコン等のリジッドな配線基板を用いてなるSiPの模式的な断面図である。配線基板151上に複数のデバイス152,153が貫通電極154と電気的に接続するように実装されており、全体として一つのパッケージを形成している。その際、図24に示すように、従来の配線基板においては、その表裏の主平面間を最短距離でつなぐように主平面に対して垂直に貫通電極が設けられていた。   FIG. 24 is a schematic cross-sectional view of SiP using a rigid wiring substrate such as ceramic or silicon. A plurality of devices 152 and 153 are mounted on the wiring substrate 151 so as to be electrically connected to the through electrode 154, and form a single package as a whole. At that time, as shown in FIG. 24, in the conventional wiring board, the through electrode is provided perpendicular to the main plane so as to connect the main planes on the front and back sides with the shortest distance.

これまでに、貫通電極や配線基板に関する技術として、以下のようなものが提案されている。たとえば、熱可塑性樹脂からなる電気絶縁性基板の一方の面に形成された配線溝に導電ペーストを充填して硬化させてなる導体回路と、前記配線溝を経て基板を貫通する貫通孔に導電ペーストを充填して硬化させ、前記導体回路と接続し、かつ基板を貫通する導体プラグとを備えたものがある(例えば、特許文献1参照)。
また、樹脂の射出成形によって一方の主面に配線用の溝を有する基材を形成し、次いで、レーザやドリルなどによりスルーホール形成部分の溝に基材を貫通する穴を形成し、さらに、基材の溝及び穴に導電材料である導電ペーストを充填するようにしたものがある(例えば、特許文献2参照)。
また、所望の回路が形成されたチップ本体と、このチップ本体の表裏を貫通した複数の貫通孔にそれぞれ埋め込み形成された貫通電極と、これらの貫通電極の両端部にそれぞれ設けられた外部電極とを備えたものがある(例えば、特許文献3参照)。
さらに、半導体チップの表裏間を貫通する複数の貫通電極を備えると共に、上記貫通電極は断面積が相互に異なるようにしたものがある(例えば、特許文献4参照)。
So far, the following technologies have been proposed as techniques related to the through electrode and the wiring board. For example, a conductive circuit in which a wiring groove formed on one surface of an electrically insulating substrate made of thermoplastic resin is filled with a conductive paste and cured, and a conductive paste in a through-hole penetrating the substrate through the wiring groove And a conductor plug that is connected to the conductor circuit and penetrates the substrate (for example, see Patent Document 1).
Moreover, a base material having a groove for wiring on one main surface is formed by injection molding of resin, and then a hole penetrating the base material is formed in the groove of the through hole forming portion by a laser or a drill, There is one in which a conductive paste, which is a conductive material, is filled in grooves and holes in a base material (see, for example, Patent Document 2).
Further, a chip body in which a desired circuit is formed, through electrodes embedded in a plurality of through holes penetrating the front and back of the chip body, external electrodes provided at both ends of these through electrodes, (For example, refer to Patent Document 3).
Furthermore, there are a plurality of through electrodes that penetrate between the front and back sides of the semiconductor chip, and the through electrodes have different cross-sectional areas (see, for example, Patent Document 4).

ところが、貫通電極を用いた3次元実装だけでなく、SiP等に用いられる配線基板においても、今後はデバイス等を内包した基材を複数重ね合わせて一つの基板をなし、より高密度な実装を可能とする複合基板を提供していく必要がある。この際、基板上に搭載されるデバイスの電極ピッチとマザーボード等に実装される際のバンプピッチとを整合させるため、或いは構成機材に内包する機能素子と電気的な接続をするため、当該配線基板内には、自由度の大きい貫通配線、つまり、直線的に基板を貫通するものだけではなく、それぞれの基材において別々の場所に形成された貫通孔を電気的に接続できるような貫通配線の形成が必要である。
これを実現するための一つの手法としては、複数の基材それぞれに貫通電極を形成しておき、表面配線等を用いてそれぞれ電気的に接続するように基材を接合する方法が考えられる。
However, not only three-dimensional mounting using penetrating electrodes, but also wiring boards used for SiP, etc., in the future, a single substrate will be formed by stacking multiple substrates containing devices, etc., to achieve higher density mounting. There is a need to provide a composite substrate that can be made possible. At this time, in order to match the electrode pitch of the device mounted on the substrate with the bump pitch when mounted on the motherboard or the like, or to make an electrical connection with the functional element included in the component equipment, the wiring substrate Inside, there are not only through wires with a high degree of freedom, that is, through wires that can be electrically connected to through holes formed at different locations in each base material as well as those that penetrate the substrate linearly. Formation is necessary.
As one method for realizing this, a method is conceivable in which through electrodes are formed on each of a plurality of base materials, and the base materials are joined so as to be electrically connected to each other using surface wiring or the like.

しかしながら、この方法では、あらかじめ各々の基材に貫通電極を形成しておき、それぞれの基材に形成された貫通電極が電気的に接続するように、表面配線等を用いて電気的に基材を接続するように形成するため、平坦化が困難であると共に、基材の枚数が多くなるほど貫通配線の接続箇所が多くなり、それに伴う接触抵抗の増加や接合不良などを生じる虞が高くなり、信頼性の高い基板の提供が困難になってくる。また、それぞれの基材に対して貫通電極及び表面配線等を形成するため、工数の増加、ひいてはコストの増加を招いてしまう。
特開2001−196703号公報 特開2001−244609号公報 特開2003−347502号公報 特開2004−152810号公報
However, in this method, through electrodes are formed in each base material in advance, and the through electrodes formed on the respective base materials are electrically connected using surface wiring or the like so that the through electrodes are electrically connected. As the number of base materials increases, the number of connecting portions of the through wiring increases, and there is a high risk of causing an increase in contact resistance and defective bonding. It becomes difficult to provide a highly reliable substrate. Moreover, since the through electrode and the surface wiring are formed on each base material, the number of man-hours and the cost are increased.
JP 2001-196703 A JP 2001-244609 A JP 2003-347502 A JP 2004-152810 A

本発明は、上記事情に鑑みてなされたものであって、貫通配線を備えた配線基板を複数用いて重ね合わせてなる複合基板において、基材表面の平坦化を可能にするとともに、電気的な信頼性が高く、設計上の自由度にも優れ、高密度な実装をも可能とする複合基板を提供することを目的とする。
また本発明は、少ない工数により形成できる複合基板の製造方法を提供することを目的とする。
さらに本発明は、高速化および高機能化を図ることが可能な電子装置を提供することを目的とする。
The present invention has been made in view of the above circumstances, and in a composite substrate formed by superimposing a plurality of wiring substrates provided with through wirings, the substrate surface can be planarized and electrically An object of the present invention is to provide a composite substrate that is highly reliable, has excellent design freedom, and enables high-density mounting.
Another object of the present invention is to provide a method of manufacturing a composite substrate that can be formed with a small number of steps.
A further object of the present invention is to provide an electronic device capable of achieving high speed and high functionality.

本発明の請求項1に係る複合基板は、基材の対向する主面を結ぶように微細孔を配し、該微細孔に第一導電性物質を充填してなる貫通配線を備えた配線基板を複数用い、前記主面の一方又は両方を重ね合わせてなり、前記貫通配線と電気的に接続するデバイスを、該配線基板の重ね合わせ面以外の表面に実装するための複合基板であって、前記複合基板を構成する前記配線基板は全て半導体基材からなり、前記配線基板同士を重ね合わせた面において、各々の配線基板に設けた微細孔の端部同士が連通するように、及び/又は、何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、一方もしくは両方の配線基板をなす基材の重ね合わせ面に溝を配置し、該溝に第二導電性物質を充填してなることを特徴とする。
本発明の請求項2に係る複合基板は、請求項1において、前記重ね合わせ面に、デバイスが備えられていることを特徴とする。
発明の請求項に係る複合基板は、請求項1または2において、前記配線基板同士の重ね合わせ面に位置する接続配線は、該重ね合わせ面をなす、両方の配線基板を跨ぐように形成されていることを特徴とする。
本発明の請求項に係る複合基板は、請求項1からのいずれか1項において、前記接続配線は、一端が前記貫通配線と電気的に接続され、他端が配線基板の側面に露呈するように形成されることを特徴とする。
The composite substrate according to claim 1 of the present invention is a wiring substrate provided with a through hole in which fine holes are arranged so as to connect opposing main surfaces of a base material, and the fine holes are filled with a first conductive material. A composite substrate for mounting a device electrically connected to the through wiring on a surface other than the overlapping surface of the wiring board , wherein one or both of the main surfaces are overlapped with each other , wherein all the wiring substrate constituting the composite substrate comprises a semiconductor substrate, in the superposed wiring boards face, so that the end portions of the fine holes formed in each wiring board are communicated, and / or The groove is disposed on the overlapping surface of the base material forming one or both of the wiring boards so that the end portion of the fine hole provided in one of the wiring boards and the side surface of the wiring board communicate with each other. It is characterized by being filled with a second conductive material.
The composite substrate according to claim 2 of the present invention is characterized in that, in claim 1, a device is provided on the overlapping surface.
Composite board according to claim 3 of the present invention, Oite to claim 1 or 2, wherein the wiring substrate connection wiring located overlapping surface of each other, form the superposed surface, to cross the both of the wiring board It is characterized by being formed.
A composite substrate according to a fourth aspect of the present invention is the composite substrate according to any one of the first to third aspects, wherein one end of the connection wiring is electrically connected to the through wiring and the other end is exposed to a side surface of the wiring substrate. It is formed so that it may do.

本発明の請求項に係る複合基板は、請求項1からのいずれか1項において、前記第一導電性物質は微細孔に、前記第二導電性物質は溝に、それぞれ設けられ、両者は一緒に充填され、連続体をなすことを特徴とする。 A composite substrate according to a fifth aspect of the present invention is the composite substrate according to any one of the first to fourth aspects, wherein the first conductive material is provided in a fine hole and the second conductive material is provided in a groove. Are packed together to form a continuum.

本発明の請求項に係る複合基板は、請求項1から5のいずれか1項において、前記複合基板は、前記貫通配線が、デバイスを搭載した際にバンプピッチの整合をとる、または、前記基材に内包する機能素子と電気的に接続するために用いられるものであることを特徴とする。 The composite substrate according to claim 6 of the present invention is the composite substrate according to any one of claims 1 to 5 , wherein the composite substrate takes a bump pitch alignment when the through-wiring is mounted with a device, or It is used for electrically connecting to a functional element included in a base material .

本発明の請求項に係る複合基板の製造方法は、基材の対向する主面を結ぶように微細孔を配し、該微細孔に導電性物質を充填してなる貫通配線を備えた第一配線基板と第二配線基板とを互いに重ね合わせてなり、前記貫通配線と電気的に接続するデバイスを、該第一配線基板および該第二配線基板の重ね合わせ面以外の表面に実装するための複合基板の製造方法であって、前記第一配線基板と前記第二配線基板を構成する各基材として、いずれも半導体基材を用い、その対向する主面を結ぶように各々の半導体基材に微細孔を形成する工程と、前記第一配線基板と前記第二配線基板とを重ね合わせた面において、前記第一配線基板と前記第二配線基板とを構成する各々の半導体基材に設けた微細孔の端部同士が連通するように、一方もしくは両方の半導体基材の重ね合わせ面に溝を形成する工程と、前記重ね合わせた状態において、各々の半導体基材の外面と、前記微細孔と前記溝の各内壁面を絶縁処理して絶縁部を設ける工程と、前記第一配線基板と前記第二配線基板とを重ね合わせた状態として、前記微細孔の内部に第一導電性物質を、前記溝の内部に第二導電性物質を、連続体をなすように、一緒に充填する工程と、を少なくとも有することを特徴とする。 According to a seventh aspect of the present invention, there is provided a composite substrate manufacturing method comprising: a through-hole formed by arranging a fine hole so as to connect opposing main surfaces of a base material; and filling the fine hole with a conductive substance. In order to mount a device which is formed by superimposing one wiring board and a second wiring board and electrically connected to the through wiring on a surface other than the overlapping surface of the first wiring board and the second wiring board A method of manufacturing a composite substrate according to claim 1, wherein each of the semiconductor substrates is formed using a semiconductor substrate as a substrate constituting each of the first wiring substrate and the second wiring substrate and connecting the opposing principal surfaces. In each of the semiconductor bases constituting the first wiring board and the second wiring board, a step of forming a microhole in the material and a surface where the first wiring board and the second wiring board are overlapped with each other One end or the other so that the ends of the provided micropores communicate with each other A step of forming a groove on the overlapping surface of both semiconductor substrates, and in the overlapped state, the outer surface of each semiconductor substrate and the inner wall surfaces of the fine holes and the grooves are insulated to insulate the insulating portions. A first conductive material in the micropores, and a second conductive material in the grooves, in a state where the first wiring substrate and the second wiring substrate are overlapped with each other. And filling together to form a body.

本発明の請求項に係る複合基板の製造方法は、請求項7において、前記配線基板として、前記重ね合わせ面にデバイスを備えているものを用いることを特徴とする。
本発明の請求項に係る複合基板の製造方法は、請求項7または8において、前記複合基板として、前記貫通配線が、デバイスを搭載した際にバンプピッチの整合をとる、または、前記基材に内包する機能素子と電気的に接続するものを用いることを特徴とする。
According to an eighth aspect of the present invention, there is provided a method for manufacturing a composite substrate according to the seventh aspect, wherein the wiring board is provided with a device on the overlapping surface.
According to a ninth aspect of the present invention, there is provided a composite substrate manufacturing method according to the seventh or eighth aspect, wherein, as the composite substrate, the through wiring takes a bump pitch alignment when a device is mounted, or the base material A device that is electrically connected to a functional element included in the device is used.

本発明の請求項10に係る電子装置は、前記請求項1からのいずれか1項に記載の複合基板に電子部品を実装してなることを特徴とする。
本発明の請求項11に係る複合基板は、請求項10において、前記複合基板は、前記電子部品を内包していることを特徴とする。
An electronic device according to a tenth aspect of the present invention is characterized in that an electronic component is mounted on the composite substrate according to any one of the first to sixth aspects.
A composite substrate according to an eleventh aspect of the present invention is the composite substrate according to the tenth aspect, wherein the composite substrate includes the electronic component.

本発明の請求項1に係る複合基板にあっては、各々の配線基板に設けた微細孔の端部同士が連通するように、及び/又は、何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、一方もしくは両方の配線基板をなす基材の重ね合わせ面に溝を配置し、該溝に導電性物質を充填して接続配線を形成している。この構成によれば、電気的に配線基板を接続するために表面配線を設ける必要が無くなり、また配線基板の表面の平坦化を図ることも可能となり、ひいては高密度な実装が可能な複合基板が得られる。   In the composite substrate according to claim 1 of the present invention, the end portions of the fine holes provided in each wiring substrate communicate with each other and / or the fine holes provided in any one of the wiring substrates. A groove is arranged on the overlapping surface of the base material forming one or both of the wiring boards so that the end and the side surface of the wiring board communicate with each other, and a conductive material is filled in the groove to form a connection wiring. ing. According to this configuration, it is not necessary to provide a surface wiring for electrically connecting the wiring board, and the surface of the wiring board can be flattened. As a result, a composite board capable of high-density mounting is obtained. can get.

また、本発明の請求項4及び請求項5に係る複合基板の製造方法は何れも、配線基板を重ね合わせて接合した後、配線基板に設けた微細孔と溝の内部に導電性物質を一緒に充填するので、それぞれ別個に貫通配線や接続配線を形成した配線基板を接合するものに比べて、工数を大幅に削減し、コストの増加を招くこと無く、複合基板を大量にかつ安価に提供することができる。   Further, in both the composite substrate manufacturing methods according to claims 4 and 5 of the present invention, after the wiring substrates are overlapped and joined, a conductive substance is put together in the fine holes and grooves provided in the wiring substrate. Compared with the case of connecting wiring boards with separate through wiring and connection wiring, the number of man-hours is greatly reduced, and a large number of composite boards are provided at low cost without increasing costs. can do.

さらに、本発明の請求項6に係る電子装置にあっては、SiP等においてより高機能、高密度なパッケージを実現することが可能な、上述した構成の複合基板に電子部品を実装しているので、高速化、高機能化に貢献することができる。   Furthermore, in the electronic device according to claim 6 of the present invention, the electronic component is mounted on the composite substrate having the above-described configuration capable of realizing a package with higher function and higher density in SiP or the like. Therefore, it can contribute to high speed and high functionality.

以下、本発明の一実施形態について説明する。
図1から21は、本発明に係る複合基板の一例を示す概略断面図である。各図に示すように、本発明の複合基板は、何れも貫通配線を備えた配線基板が複数枚重ね合わされ、接合されてなるものである。また、本発明の複合基板を構成する配線基板は、全て半導体基材からなる。複合基板はデバイス(電子部品)を内包していてもよい。本発明の複合基板は、貫通配線と電気的に接続するデバイスを、配線基板の重ね合わせ面以外の表面に実装するために用いられるものである。
すなわち、本発明の複合基板は、貫通配線が、デバイスを搭載した際にバンプピッチの整合をとる、または、基材に内包する機能素子と電気的に接続するために用いることができる。
前記配線基板は、当該配線基板を構成する基材の対向する主面を結ぶように微細孔が配されている。また、配線基板は、前記微細孔と共に、互いに接合した面(すなわち、重ね合わせ面)において、各々の配線基板に設けた微細孔の端部同士が連通するように、及び/又は、何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、一方もしくは両方の配線基板をなす基材の重ね合わせ面に溝が配置されている。そして、前記微細孔と前記溝の内部には、導電性物質がそれぞれ充填されている。
したがって、前記配線基板を複数用い、重ね合わせることにより、その両主面、及び/又は、何れか一方の主面と側面とを電気的に接続する複合基板が構成されるものとなる。
Hereinafter, an embodiment of the present invention will be described.
1 to 21 are schematic sectional views showing an example of a composite substrate according to the present invention. As shown in each drawing, each of the composite substrates of the present invention is formed by superimposing and bonding a plurality of wiring substrates each provided with a through wiring. Also, wiring board that make up the composite substrate of the present invention consists of all semiconductor substrate. The composite substrate may contain a device (electronic component). The composite substrate of the present invention is used for mounting a device that is electrically connected to the through wiring on a surface other than the overlapping surface of the wiring substrate.
That is, the composite substrate of the present invention can be used for the through wiring to adjust the bump pitch when the device is mounted, or to electrically connect the functional element included in the base material.
The wiring board is provided with fine holes so as to connect opposing main surfaces of the base material constituting the wiring board. In addition, in the wiring board, the ends of the fine holes provided in each wiring board communicate with each other on the surfaces joined together with the fine holes (that is, the overlapping surface) and / or either one of them. Grooves are arranged on the overlapping surface of the base material forming one or both of the wiring boards so that the ends of the fine holes provided in the wiring board communicate with the side surfaces of the wiring board. And the inside of the said micropore and the said groove | channel is filled with the electroconductive substance, respectively.
Therefore, by using a plurality of the wiring boards and overlapping them, a composite board that electrically connects both the main surfaces and / or any one of the main surfaces and the side surfaces is formed.

このように、本発明の複合基板は、基材に微細孔と溝を形成した配線基板を重ね合わせて接合した後、第一導電性物質は微細孔の内部に、第二導電性物質は溝の内部に、それぞれ一緒に充填され連続体をなす。そのため、それぞれ別個に貫通配線や接続配線を形成して接合したものに比べて、工数を大幅に削減することができる。
また、本発明の複合基板における導電性物質は、重ね合わせる配線基板の枚数が多くなっても、配線基板をなす基材の重ね合わせ面に配置した溝に充填された連続体をなす導電性物質からなる接続配線によって基板同士を接続しているので、接触抵抗の増加や接続不良といった電気特性不良を抑制することが可能となる。しかも、微細孔及び溝の内部において同一の導電性物質によって接続されているので、一層接触抵抗の増加や接続不良といった電気特性不良を抑制することが可能となる。
さらに、本発明の複合基板は、連通する微細孔と溝を適宜組み合わせることにより、配線基板の上面と下面のピッチを自由に設定できるため、工数が少なく、自由度の高い複合基板を製造することができる。
Thus, in the composite substrate of the present invention, the first conductive material is placed inside the microhole, and the second conductive material is placed in the groove after the wiring substrate having the fine holes and the grooves formed on the base material is joined. inside of, each filled together form a continuum. Therefore , the number of man-hours can be greatly reduced as compared with the case where the through wiring and the connection wiring are separately formed and joined.
In addition, the conductive material in the composite substrate of the present invention is a conductive material that forms a continuum filled in a groove disposed on the overlapping surface of the base material forming the wiring substrate, even if the number of wiring substrates to be superimposed increases. Since the substrates are connected to each other by the connection wiring made of, it is possible to suppress an electrical characteristic failure such as an increase in contact resistance or a connection failure. In addition, since the minute holes and the grooves are connected by the same conductive material, it is possible to further suppress electrical characteristic defects such as an increase in contact resistance and connection failure.
Furthermore, since the composite substrate of the present invention can freely set the pitch between the upper surface and the lower surface of the wiring substrate by appropriately combining fine holes and grooves that communicate with each other, it is possible to manufacture a composite substrate with less man-hours and a high degree of freedom. Can do.

本発明の複合基板としては、前述したように、具体的に大きく分けて6つの形態が挙げられる。
この6つの形態とは、すなわち、基材の対向する主面を結ぶように微細孔を配し、該微細孔に第一導電性物質を充填してなる貫通配線を備えた配線基板の重ね合わせ面において、(1)各々の配線基板に設けた微細孔の端部同士が連通するように溝を配置し、該溝に第二導電性物質を充填してなる接続配線を備えたもの、(2)何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように溝を配置し、該溝に第二導電性物質を充填してなる接続配線を備えたもの、(3)各々の配線基板に設けた微細孔の端部同士が連通するように、及び何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、それぞれ溝を配置し、該溝に第二導電性物質を充填してなる接続配線を備えたもの、といった3つの形態に、前記溝が、前記重ね合わせ面の(a)一方の配線基板をなす基材に配置されているもの、もしくは(b)両方の配線基板をなす基材に配置されているもの、といった2つの形態を掛け合わせたものである。
As described above, the composite substrate of the present invention can be roughly divided into six forms.
These six forms are: a superposition of wiring boards provided with through-holes in which fine holes are arranged so as to connect the opposing main surfaces of the base material and the fine holes are filled with the first conductive material. (1) a groove is disposed so that the ends of the fine holes provided in each wiring substrate communicate with each other, and the connection wiring formed by filling the groove with a second conductive material is provided. 2) A groove is arranged so that the end of the fine hole provided in any one of the wiring boards communicates with the side surface of the wiring board, and a connection wiring formed by filling the groove with the second conductive material is provided. (3) The ends of the fine holes provided in each wiring board communicate with each other, and the ends of the fine holes provided in any one of the wiring boards communicate with the side surfaces of the wiring boards. Each having a groove, and having a connection wiring formed by filling the groove with a second conductive material, etc. In one form, the groove is (a) arranged on the base material forming one wiring board of the overlapping surface, or (b) the base material forming both wiring boards, These two are combined.

次に、それぞれの形態について図面に基づき詳細に説明する。
(第一実施形態)
第一実施形態は、前記重ね合わせ面において、各々の配線基板に設けた微細孔の端部同士が連通するように、一方の配線基板をなす基材にのみ溝を配置し、該溝に第二導電性物質を充填してなる接続配線を備えた、前記(1)に前記(a)を掛け合わせた構成のものである。
本発明の第一実施形態における複合基板としては、たとえば、図1から3に示すように、互いに重ね合わされる複数の配線基板11,12または12,13に、それぞれの基材1,2,3の対向する主面を結ぶように微細孔15が配され、該微細孔15に第一導電性物質16aを充填した貫通配線17を備えると共に、互いに重ね合わされる各々の配線基板11,12または12,13に備えた前記貫通配線17同士を、互いに重ね合わされる一方の配線基板12にだけ配置した溝14の内部に第二導電性物質16bを充填した接続配線18によって繋いだ例が挙げられる。なお、図1から21では、配線基板が2枚又は3枚重ねあわされた複合基板しか説明されていないが、本発明はこれに限定されず、4枚以上の配線基板が重ねあわされた複合基板としても良く、以下に説明する他の実施形態においても同様である。
Next, each form is demonstrated in detail based on drawing.
(First embodiment)
In the first embodiment, grooves are arranged only on the base material forming one wiring board so that the ends of the fine holes provided in each wiring board communicate with each other on the overlapping surface, and It is the thing of the structure which provided the connection wiring formed by filling two electroconductive substances, and multiplied said (a) to said (1).
As a composite substrate in the first embodiment of the present invention, for example, as shown in FIGS. 1 to 3, a plurality of wiring substrates 11, 12 or 12, 13 that are superposed on each other are respectively provided with base materials 1, 2, 3. Are provided with through-holes 17 filled with the first conductive material 16a, and each of the wiring boards 11, 12 or 12 superposed on each other. , 13 are connected to each other by a connection wiring 18 filled with a second conductive material 16b inside a groove 14 arranged only on one wiring substrate 12 to be overlapped with each other. 1 to 21 only illustrate a composite substrate in which two or three wiring boards are stacked, the present invention is not limited to this, and a composite in which four or more wiring substrates are stacked. The substrate may be used, and the same applies to other embodiments described below.

図1は、二つの配線基板11a,12aを重ね合わせた複合基板10Aを示すものである。配線基板11a及び配線基板12aは、共に貫通配線17を一箇所ずつ備えている。また、配線基板12aは、前記配線基板11aとの重ね合わせ面において、前記貫通配線17の上面A側に位置する端部と前記配線基板11aにおける貫通配線17の下面B側に位置する端部とを繋ぐ接続配線18を備えている。これにより、前記二つの配線基板11a,12aは、それぞれ備えている各貫通配線17,17と、重ね合わせ面において一方の配線基板12aの主面に備えた接続配線18によって、前記複合基板10Aの上面Aと下面Bとを電気的に接続している。   FIG. 1 shows a composite substrate 10A in which two wiring substrates 11a and 12a are overlapped. Both the wiring board 11a and the wiring board 12a are provided with through wirings 17 one by one. In addition, the wiring substrate 12a has an end portion located on the upper surface A side of the through wiring 17 and an end portion located on the lower surface B side of the through wiring 17 in the wiring substrate 11a on the overlapping surface with the wiring substrate 11a. Connection wiring 18 is provided. As a result, the two wiring boards 11a and 12a are connected to the through-hole wirings 17 and 17, respectively, and the connection wiring 18 provided on the main surface of one wiring board 12a on the overlapping surface. The upper surface A and the lower surface B are electrically connected.

また、図2は、二つの配線基板11b,12bを重ね合わせた複合基板10Bを示すものである。配線基板11b及び配線基板12bは、共に貫通配線17を二箇所ずつ備えている。また、配線基板12bは、前記配線基板11bとの重ね合わせ面において、側面C側に位置する前記貫通配線17の上面A側に位置する端部と、前記配線基板11bにおける側面C側に位置する貫通配線17の下面B側に位置する端部とを繋ぐ接続配線18、及び側面D側に位置する前記貫通配線17の上面A側に位置する端部と、前記配線基板11bにおける側面D側に位置する貫通配線17の下面B側に位置する端部とを繋ぐ接続配線18を備えている。これにより、前記二つの配線基板11b,12bは、それぞれ備えている各貫通配線17,17と、重ね合わせ面において一方の配線基板12bの主面に備えた二つの接続配線18によって、前記複合基板10Bの上面Aと下面Bとを二箇所でそれぞれ電気的に接続している。   FIG. 2 shows a composite substrate 10B in which two wiring substrates 11b and 12b are overlapped. Both the wiring board 11b and the wiring board 12b are provided with two through wirings 17 each. In addition, the wiring board 12b is located on the side of the side surface C of the wiring board 11b and the end portion of the wiring board 11b on the upper surface A side of the through wiring 17 on the side of the overlapping surface with the wiring board 11b. The connection wiring 18 connecting the end located on the lower surface B side of the through wiring 17, the end located on the upper surface A side of the through wiring 17 located on the side D side, and the side D on the wiring substrate 11 b A connection wiring 18 is provided to connect the end portion located on the lower surface B side of the through wiring 17 positioned. As a result, the two wiring boards 11b and 12b are respectively connected to the composite board by the respective through wirings 17 and 17 and the two connection wirings 18 provided on the main surface of the one wiring board 12b on the overlapping surface. The upper surface A and the lower surface B of 10B are electrically connected at two locations.

また、図3は、三つの配線基板11c,12c,13cを重ね合わせた複合基板10Cを示すものである。配線基板11c、配線基板12c及び配線基板13cは、それぞれ貫通配線17を一箇所備えている。また、配線基板12cは、前記配線基板11cとの重ね合わせ面において、前記貫通配線17の上面A側に位置する端部と、前記配線基板11cにおける貫通配線17の下面B側に位置する端部とを繋ぐ接続配線18、及び前記配線基板13cとの重ね合わせ面において、前記貫通配線17の下面B側に位置する端部と、前記配線基板13cにおける貫通配線17の上面A側に位置する端部とを繋ぐ接続配線18を備えている。これにより、前記三つの配線基板11c,12c,13cは、それぞれ備えている各貫通配線17,17,17と、重ね合わせ面において何れも一方の配線基板12cの主面に備えた接続配線18によって、前記複合基板10Cの上面Aと下面Bとを電気的に接続している。   FIG. 3 shows a composite substrate 10C in which three wiring substrates 11c, 12c, and 13c are overlapped. Each of the wiring board 11c, the wiring board 12c, and the wiring board 13c has a through wiring 17 in one place. In addition, the wiring board 12c has an end located on the upper surface A side of the through wiring 17 and an end located on the lower surface B side of the through wiring 17 in the wiring board 11c on the overlapping surface with the wiring board 11c. And the end located on the lower surface B side of the through-wiring 17 and the end located on the upper surface A side of the through-wiring 17 in the wiring substrate 13c. The connection wiring 18 which connects a part is provided. Thus, the three wiring boards 11c, 12c, 13c are respectively provided by the respective through wirings 17, 17, 17 and the connection wiring 18 provided on the main surface of one wiring board 12c on the overlapping surface. The upper surface A and the lower surface B of the composite substrate 10C are electrically connected.

(第二実施形態)
第二実施形態は、前記重ね合わせ面において、各々の配線基板に設けた微細孔の端部同士が連通するように、双方の配線基板をなす基材にそれぞれ溝を配置し、該溝に第二導電性物質を充填してなる接続配線を備えた、前記(1)に前記(b)を掛け合わせた構成のものである。
本発明の第二実施形態における複合基板としては、たとえば、図4から6に示すように、互いに重ね合わされる複数の配線基板21,22または22,23に、それぞれの基材1,2,3の対向する主面を結ぶように微細孔25が配され、該微細孔25に第一導電性物質26aを充填した貫通配線27を備えると共に、互いに重ね合わされる各々の配線基板21,22または22,23に備えた前記貫通配線27同士を、互いに重ね合わされる双方の配線基板21,22または22,23にそれぞれ配置した溝24の内部に第二導電性物質26bを充填した接続配線28によって繋いだ例が挙げられる。
(Second embodiment)
In the second embodiment, grooves are arranged in the base material forming both wiring boards so that the ends of the fine holes provided in each wiring board communicate with each other on the overlapping surface. It has a configuration in which (b) is multiplied by (1) above, which includes a connection wiring filled with two conductive substances.
As the composite substrate in the second embodiment of the present invention, for example, as shown in FIGS. 4 to 6, a plurality of wiring substrates 21, 22 or 22, 23 that are superposed on each other are respectively base materials 1, 2, 3. Are provided with through holes 27 filled with the first conductive material 26a, and each of the wiring boards 21, 22 or 22 overlapped with each other. , 23 are connected to each other by a connection wiring 28 filled with a second conductive material 26b in the groove 24 arranged in each of the wiring boards 21, 22, or 22, 23, which are superimposed on each other. An example is given.

図4は、二つの配線基板21a,22aを重ね合わせた複合基板20Aを示すものである。配線基板21a及び配線基板22aは、共に貫通配線27を一箇所ずつ備えている。また、配線基板21aは、前記配線基板22aとの重ね合わせ面において、該貫通配線27の下面B側に位置する端部と、前記配線基板22aにおける貫通配線27の上面A側に位置する端部とを繋ぐ接続配線28を備えている。また、配線基板22aは、前記配線基板21aとの重ね合わせ面において、該貫通配線27の上面A側に位置する端部と、前記配線基板21aにおける貫通配線27の下面B側に位置する端部とを、前記配線基板21aにおける接続配線28と同様に繋ぐ接続配線28を備えている。これにより、前記二つの配線基板21a,22aは、それぞれ備えている各貫通配線27,27と、重ね合わせ面において双方の配線基板21a,22aの主面にそれぞれ備えた接続配線28によって、前記複合基板20Aの上面Aと下面Bとを電気的に接続している。
すなわち、配線基板21a,22aの重ね合わせ面に位置する接続配線28は、該重ね合わせ面をなす、両方の配線基板を跨ぐように形成されている。
FIG. 4 shows a composite substrate 20A in which two wiring substrates 21a and 22a are overlapped. Both the wiring board 21a and the wiring board 22a are provided with through-holes 27 one by one. Further, the wiring board 21a has an end portion located on the lower surface B side of the through wiring 27 and an end portion located on the upper surface A side of the through wiring 27 in the wiring board 22a on the overlapping surface with the wiring board 22a. Connection wiring 28 is provided. The wiring board 22a has an end portion located on the upper surface A side of the through wiring 27 and an end portion located on the lower surface B side of the through wiring 27 in the wiring board 21a on the overlapping surface with the wiring board 21a. Are connected in the same manner as the connection wiring 28 in the wiring board 21a. As a result, the two wiring boards 21a and 22a are connected to each other by the respective through wirings 27 and 27 and the connection wirings 28 provided on the main surfaces of both wiring boards 21a and 22a on the overlapping surface. The upper surface A and the lower surface B of the substrate 20A are electrically connected.
That is, the connection wiring 28 positioned on the overlapping surface of the wiring boards 21a and 22a is formed so as to straddle both wiring boards forming the overlapping surface.

また、図5は、二つの配線基板21b,22bを重ね合わせた複合基板20Bを示すものである。配線基板21b及び配線基板22bは、共に貫通配線27を二箇所ずつ備えている。また、配線基板21bは、前記配線基板22bとの重ね合わせ面において、側面D側に位置する前記貫通配線27の下面B側に位置する端部と、前記配線基板22bにおける側面D側に位置する貫通配線27の上面A側に位置する端部とを繋ぐ接続配線28を備えている。また、配線基板22bは、前記配線基板21bとの重ね合わせ面において、側面C側に位置する前記貫通配線27の上面A側に位置する端部と、前記配線基板21bにおける側面C側に位置する貫通配線27の下面B側に位置する端部とを繋ぐ接続配線28を備えている。これにより、前記二つの配線基板21b,22bは、それぞれ備えている各貫通配線27,27と、重ね合わせ面において双方の配線基板21b,22bの主面にそれぞれ備えた各接続配線28によって、前記複合基板20Bの上面Aと下面Bとを二箇所でそれぞれ電気的に接続している。   FIG. 5 shows a composite substrate 20B in which two wiring substrates 21b and 22b are overlapped. Each of the wiring board 21b and the wiring board 22b includes two through wirings 27. Further, the wiring board 21b is positioned on the side surface D side of the wiring board 22b and the end part located on the lower surface B side of the through wiring 27 located on the side face D side on the overlapping surface with the wiring board 22b. A connection wiring 28 that connects an end portion of the through wiring 27 located on the upper surface A side is provided. In addition, the wiring board 22b is located on the side surface C side of the wiring board 21b and the end part located on the upper surface A side of the through wiring 27 located on the side face C side on the overlapping surface with the wiring board 21b. A connection wiring 28 that connects the end portion of the through wiring 27 on the lower surface B side is provided. Thus, the two wiring boards 21b and 22b are respectively provided by the through wirings 27 and 27 provided respectively and the connection wirings 28 provided on the main surfaces of both the wiring boards 21b and 22b on the overlapping surface. The upper surface A and the lower surface B of the composite substrate 20B are electrically connected at two locations, respectively.

また、図6は、三つの配線基板21c,22c,23cを重ね合わせた複合基板20Cを示すものである。配線基板21c、配線基板22c及び配線基板23cは、共に貫通配線27を二箇所ずつ備えている。前記貫通配線27のうち、配線基板21cにおける側面D側に位置する貫通配線27の下面B側に位置する端部と、配線基板22cにおける側面D側に位置する貫通配線27の上面A側に位置する端部とは直接繋がっている。また、配線基板22cは、前記配線基板21cとの重ね合わせ面において、側面C側に位置する前記貫通配線27の上面A側に位置する端部と、前記配線基板21cにおける側面C側に位置する貫通配線27の下面B側に位置する端部とを繋ぐ接続配線28、及び前記配線基板23cとの重ね合わせ面において、側面D側に位置する前記貫通配線27の下面B側に位置する端部と、前記配線基板23cにおける側面D側に位置する貫通配線27の上面A側に位置する端部とを繋ぐ接続配線28を備えている。また、配線基板23cは、前記配線基板22cとの重ね合わせ面において、側面C側に位置する前記貫通配線27の上面A側に位置する端部と、前記配線基板22cにおける側面C側に位置する貫通配線27の下面B側に位置する端部とを繋ぐ接続配線28、及び側面D側に位置する前記貫通配線27の上面A側に位置する端部と、前記配線基板22cにおける側面D側に位置する貫通配線27の下面B側に位置する端部とを、前記配線基板22cにおける接続配線28と同様に繋ぐ接続配線28を備えている。これにより、前記三つの配線基板21c,22c,23cは、それぞれ備えている各貫通配線27,27,27と、上面A側の重ね合わせ面において一方の配線基板22cの主面に備えた接続配線28によって前記複合基板20Aの上面Aと下面Bとを電気的に接続すると共に、下面B側の重ね合わせ面において一方の配線基板23cの主面に備えた接続配線28と、双方の配線基板22c,23cの主面にそれぞれ備えた接続配線28によって前記複合基板20Aの上面Aと下面Bとを電気的に接続する。   FIG. 6 shows a composite substrate 20C in which three wiring substrates 21c, 22c, and 23c are overlapped. Each of the wiring board 21c, the wiring board 22c, and the wiring board 23c includes two through wirings 27. Among the through wirings 27, an end portion located on the lower surface B side of the through wiring 27 located on the side surface D side of the wiring substrate 21 c and an upper surface A side of the through wiring 27 located on the side surface D side of the wiring substrate 22 c. It is directly connected to the end. Further, the wiring board 22c is positioned on the side of the side surface C of the wiring board 21c and the end portion of the wiring board 21c that is positioned on the upper surface A side of the through wiring 27 on the side of the overlapping surface with the wiring board 21c. An end portion located on the lower surface B side of the through wiring 27 located on the side surface D side in an overlapping surface of the connection wiring 28 connecting the end portion located on the lower surface B side of the through wiring 27 and the wiring substrate 23c. And a connection wiring 28 that connects the end portion located on the upper surface A side of the through wiring 27 located on the side surface D side of the wiring board 23c. The wiring board 23c is positioned on the side of the side surface C of the wiring board 22c and the end portion of the wiring board 22c positioned on the upper surface A side of the through wiring 27 on the side of the overlapping surface with the wiring board 22c. The connection wiring 28 connecting the end located on the lower surface B side of the through wiring 27, the end located on the upper surface A side of the through wiring 27 located on the side D side, and the side D on the wiring substrate 22c. A connection wiring 28 is provided for connecting the end portion of the through wiring 27 positioned on the lower surface B side in the same manner as the connection wiring 28 in the wiring substrate 22c. Thus, the three wiring boards 21c, 22c, and 23c are respectively provided with the through wirings 27, 27, and 27, and the connection wiring provided on the main surface of one wiring board 22c on the overlapping surface on the upper surface A side. 28, the upper surface A and the lower surface B of the composite substrate 20A are electrically connected to each other, the connection wiring 28 provided on the main surface of one wiring substrate 23c on the overlapping surface on the lower surface B side, and both wiring substrates 22c , 23c are electrically connected to the upper surface A and the lower surface B of the composite substrate 20A by connection wirings 28 respectively provided on the main surfaces.

(第三実施形態)
第三実施形態は、前記重ね合わせ面において、前記重ね合わせ面において、何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、一方の配線基板をなす基材にのみ溝を配置し、該溝に第二導電性物質を充填してなる接続配線を備えた、前記(2)に前記(a)を掛け合わせた構成のものである。
本発明の第三実施形態における複合基板としては、たとえば、図7から9に示すように、互いに重ね合わされる複数の配線基板31,32また32,33に、それぞれの基材1,2,3の対向する主面を結ぶように微細孔35が配され、該微細孔35に第一導電性物質36aを充填した貫通配線37を備えると共に、互いに重ね合わされる各々の配線基板31,32または32,33に備えた前記貫通配線37の端部と該配線基板の側面とを、互いに重ね合わされる一方の配線基板31にだけ配置した溝34の内部に第二導電性物質36bを充填した接続配線38によって繋いだ例が挙げられる。
このように第三実施形態は、各配線基板31,32,33の重ね合わせ面少なくとも一方に形成する溝34の少なくとも一部が、各配線基板31,32,33の側面C又はDに開口しているものである。
これにより、複合基板の上面Aと下面Bとのみでなく、上面A又は下面Bと側面C又は側面Dとを電気的に接続でき、たとえば、側面方向にデバイスを搭載することで、機能キューブのような高性能デバイスパッケージを実現でき、より一層の高機能化を達成できる自由度の高い配線基板を提供できる。
(Third embodiment)
In the third embodiment, one wiring board is arranged on the overlapping surface so that the end of the microhole provided in any one of the wiring boards communicates with the side surface of the wiring board. A groove is disposed only in the base material to be formed, and a connection wiring formed by filling the groove with a second conductive material is provided with (2) multiplied by (a).
As the composite substrate in the third embodiment of the present invention, for example, as shown in FIGS. 7 to 9, a plurality of wiring substrates 31, 32 or 32, 33 stacked on each other are respectively provided with base materials 1, 2, 3. Are provided with through-holes 37 filled with the first conductive material 36a, and the wiring boards 31, 32 or 32 that are superposed on each other. , 33, the connection wiring in which the end portion of the through wiring 37 and the side surface of the wiring board are filled with the second conductive material 36 b inside the groove 34 disposed only on one wiring board 31 that is overlapped with each other. The example connected by 38 is given.
As described above, in the third embodiment, at least a part of the groove 34 formed in at least one of the overlapping surfaces of the wiring boards 31, 32, 33 is open to the side surface C or D of the wiring boards 31, 32, 33. It is what.
Thereby, not only the upper surface A and the lower surface B of the composite substrate but also the upper surface A or the lower surface B and the side surface C or the side surface D can be electrically connected. For example, by mounting the device in the side surface direction, Such a high-performance device package can be realized, and a wiring board with a high degree of freedom capable of achieving further higher functionality can be provided.

図7は、二つの配線基板31a,32aを重ね合わせた複合基板30Aを示すものである。配線基板31aは、貫通配線37を二箇所、及び配線基板32aは、貫通配線37を一箇所それぞれ備えている。前記貫通配線37のうち、配線基板31aにおける側面C側に位置する貫通配線37の下面B側に位置する端部と、配線基板32aにおける貫通配線37の上面A側に位置する端部とは直接繋がっている。また、配線基板31aは、前記配線基板32aとの重ね合わせ面において、側面D側に位置する前記貫通配線37の下面B側に位置する端部と一端が繋がり、他端が該配線基板31aにおける側面Dに露呈する接続配線38を備えている。これにより、前記二つの配線基板31a,32aは、それぞれ備えている各貫通配線37,37によって前記複合基板30Aの上面Aと下面Bを電気的に接続すると共に、重ね合わせ面において、一方の配線基板31aの主面に備えた側面Dに露呈する接続配線38によって上面Aと側面Dとを電気的に接続している。   FIG. 7 shows a composite substrate 30A in which two wiring substrates 31a and 32a are overlapped. The wiring board 31a includes two through wirings 37, and the wiring board 32a includes one through wiring 37. Of the through wiring 37, an end located on the lower surface B side of the through wiring 37 located on the side C side of the wiring substrate 31 a and an end located on the upper surface A side of the through wiring 37 in the wiring substrate 32 a are directly connected. It is connected. Further, the wiring substrate 31a has one end connected to the lower surface B side of the through wiring 37 positioned on the side surface D side and the other end of the wiring substrate 31a on the overlapping surface with the wiring substrate 32a. The connection wiring 38 exposed to the side surface D is provided. Thereby, the two wiring boards 31a and 32a are electrically connected to the upper surface A and the lower surface B of the composite substrate 30A by the respective through wirings 37 and 37, respectively, and one wiring is formed on the overlapping surface. The upper surface A and the side surface D are electrically connected by the connection wiring 38 exposed on the side surface D provided on the main surface of the substrate 31a.

また、図8は、二つの配線基板31b,32bを重ね合わせた複合基板30Bを示すものである。配線基板31b及び配線基板32bは、共に貫通配線37を一箇所ずつ備えている。また、配線基板32bは、前記配線基板31bとの重ね合わせ面において、前記配線基板31bの貫通配線37の下面B側に位置する端部と一端が繋がり、他端が該配線基板32bにおける側面Dに露呈する接続配線38、及び該貫通配線37の上面A側に位置する端部と一端が繋がり、他端が該配線基板32bにおける側面Cに露呈する接続配線38を備えている。これにより、前記二つの配線基板31b,32bは、配線基板31bが備えている貫通配線37と、重ね合わせ面において一方の配線基板32bの主面に備えた側面Dに露呈する接続配線38によって上面Aと側面Dを電気的に接続すると共に、配線基板32bが備えている貫通配線37と、重ね合わせ面において側面Cに露呈する接続配線38によって下面Bと側面Cとを電気的に接続している。   FIG. 8 shows a composite substrate 30B in which two wiring substrates 31b and 32b are overlapped. Both the wiring board 31b and the wiring board 32b are provided with through wirings 37 one by one. Further, the wiring board 32b has one end connected to the lower surface B side of the through wiring 37 of the wiring board 31b on the overlapping surface with the wiring board 31b, and the other end is a side surface D of the wiring board 32b. And the connection wiring 38 exposed to the side surface C of the wiring board 32b, and one end of the through wiring 37 located on the upper surface A side and one end are connected. Thereby, the two wiring boards 31b and 32b are upper surfaces by the through wiring 37 provided on the wiring board 31b and the connection wiring 38 exposed on the side surface D provided on the main surface of the one wiring board 32b on the overlapping surface. A and the side surface D are electrically connected, and the lower surface B and the side surface C are electrically connected by the through wiring 37 provided in the wiring board 32b and the connection wiring 38 exposed to the side surface C on the overlapping surface. Yes.

また、図9は、三つの配線基板31c,32c,33cを重ね合わせた複合基板30Cを示すものである。配線基板31c及び配線基板33cは、共に貫通配線37を一箇所ずつ備え、配線基板32cは、貫通配線37を二箇所備えている。前記貫通配線37のうち、配線基板31cにおける貫通配線37の下面B側に位置する端部と、配線基板32cにおける側面D側に位置する貫通配線37の上面A側に位置する端部とは直接繋がり、また、配線基板32cにおける側面C側に位置する貫通配線37の下面B側に位置する端部と、配線基板33cにおける貫通配線37の上面A側に位置する端部とは直接繋がっている。また、配線基板32cは、前記配線基板31cとの重ね合わせ面において、側面C側に位置する前記貫通配線37の上面A側に位置する端部と一端が繋がり、他端が該配線基板32cにおける側面Cに露呈する接続配線38、及び側面D側に位置する前記貫通配線37の下面B側に位置する端部と一端が繋がり、他端が該配線基板32cにおける側面Dに露呈する接続配線38を備えている。これにより、前記三つの配線基板31c,32c,33cは、配線基板31c及び配線基板32cがそれぞれ備えている貫通配線37,37と、配線基板32cと配線基板33cとの重ね合わせ面において一方の配線基板32cの主面に備えた側面Dに露呈する接続配線38によって上面Aと側面Dを電気的に接続すると共に、配線基板32c及び配線基板33cがそれぞれ備えている貫通配線37,37と、配線基板31cと配線基板32cとの重ね合わせ面において一方の配線基板32cの主面に備えた側面Cに露呈する接続配線38によって下面Bと側面Cとを電気的に接続している。   FIG. 9 shows a composite substrate 30C in which three wiring substrates 31c, 32c, and 33c are overlapped. Each of the wiring board 31c and the wiring board 33c includes a through wiring 37, and the wiring board 32c includes two through wirings 37. Of the through wiring 37, the end portion of the wiring board 31c located on the lower surface B side of the through wiring 37 and the end portion of the wiring board 32c located on the side surface D side of the through wiring 37 are located directly on the upper surface A side. Moreover, the end located on the lower surface B side of the through wiring 37 located on the side surface C side in the wiring substrate 32c and the end located on the upper surface A side of the through wiring 37 in the wiring substrate 33c are directly connected. . The wiring board 32c has one end connected to the upper surface A side of the through wiring 37 located on the side surface C side and one end connected to the wiring board 31c, and the other end of the wiring board 32c on the wiring board 32c. The connection wiring 38 exposed on the side surface C, and the connection wiring 38 exposed on the side surface D of the wiring substrate 32c, with one end connected to the lower surface B side of the through wiring 37 positioned on the side surface D side. It has. As a result, the three wiring boards 31c, 32c, and 33c have one wiring on the overlapping surface of the wiring board 31c and the through wirings 37 and 37 provided in the wiring board 32c and the wiring board 32c and the wiring board 33c, respectively. The upper surface A and the side surface D are electrically connected by the connection wiring 38 exposed on the side surface D provided on the main surface of the substrate 32c, and the through wirings 37, 37 provided in the wiring substrate 32c and the wiring substrate 33c, respectively, The lower surface B and the side surface C are electrically connected by the connection wiring 38 exposed to the side surface C provided on the main surface of one wiring substrate 32c on the overlapping surface of the substrate 31c and the wiring substrate 32c.

(第四実施形態)
第四実施形態は、前記重ね合わせ面において、何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、双方の配線基板をなす基材にそれぞれ溝を配置し、該溝に第二導電性物質を充填してなる接続配線を備えた、前記(2)に前記(b)を掛け合わせた構成のものである。
本発明の第四実施形態における複合基板としては、たとえば、図10から12に示すように、互いに重ね合わされる複数の配線基板41,42また42,43に、それぞれの基材1,2,3の対向する主面を結ぶように微細孔45が配され、該微細孔45に第一導電性物質46aを充填した貫通配線47を備えると共に、互いに重ね合わされる各々の配線基板41,42または42,43に備えた前記貫通配線47の端部と該配線基板の側面とを、互いに重ね合わされる双方の配線基板41,42または42,43にそれぞれ配置した溝44の内部に第二導電性物質46bを充填した接続配線48によって繋いだ例が挙げられる。
(Fourth embodiment)
In the fourth embodiment, grooves are formed in the base material forming both wiring boards so that the end of the fine hole provided in one of the wiring boards and the side surface of the wiring board communicate with each other on the overlapping surface. And (2) multiplied by (b) above, provided with a connection wiring formed by filling the groove with a second conductive material.
As a composite substrate in the fourth embodiment of the present invention, for example, as shown in FIGS. 10 to 12, a plurality of wiring substrates 41, 42, and 42, 43 that are superposed on each other are provided with respective base materials 1, 2, and 3, respectively. Are provided with through-holes 47 filled with the first conductive material 46a, and the wiring boards 41, 42 or 42 that are superposed on each other. , 43, the end portion of the through-wiring 47 and the side surface of the wiring board are placed in the grooves 44 arranged in the two wiring boards 41, 42 or 42, 43, which are superposed on each other. An example is shown in which the connection lines 48 filled with 46b are connected.

図10は、二つの配線基板41a,42aを重ね合わせた複合基板40Aを示すものである。配線基板41a及び配線基板42aは、共に貫通配線47を一箇所ずつ備えている。また、配線基板41aは、前記配線基板42aとの重ね合わせ面において、該貫通配線47の下面B側に位置する端部と一端が繋がり、他端が該配線基板41aにおける側面Dに露呈する接続配線48を備えている。また、配線基板42aは、前記配線基板41aとの重ね合わせ面において、該貫通配線47の上面A側に位置する端部と一端が繋がり、他端が該配線基板42aにおける側面Cに露呈する接続配線48を備えている。これにより、前記二つの配線基板41a,42aは、配線基板41aが備えている貫通配線47と、重ね合わせ面において一方の配線基板41aの主面に備えた側面Dに露呈する接続配線48によって上面Aと側面Dを電気的に接続すると共に、配線基板42aが備えている貫通配線47と、重ね合わせ面において他方の配線基板42aの主面に備えた側面Cに露呈する接続配線48によって下面Bと側面Cを電気的に接続している。   FIG. 10 shows a composite substrate 40A in which two wiring substrates 41a and 42a are overlapped. Both the wiring board 41a and the wiring board 42a are provided with through-hole wirings 47 one by one. Further, the wiring board 41a is connected so that one end of the wiring board 41a on the lower surface B side of the through wiring 47 is connected to one end and the other end is exposed to the side face D of the wiring board 41a. Wiring 48 is provided. Further, the wiring substrate 42a is connected so that one end of the through wiring 47 on the upper surface A side and one end are connected to each other, and the other end is exposed to the side surface C of the wiring substrate 42a. Wiring 48 is provided. As a result, the two wiring boards 41a and 42a are upper surfaces by the through wiring 47 provided on the wiring board 41a and the connection wiring 48 exposed on the side surface D provided on the main surface of the one wiring board 41a on the overlapping surface. A and D are electrically connected to each other, and lower surface B is formed by through wiring 47 provided on wiring board 42a and connection wiring 48 exposed on side C provided on the main surface of the other wiring board 42a on the overlapping surface. And side C are electrically connected.

また、図11は、二つの配線基板41b,42bを重ね合わせた複合基板40Bを示すものである。配線基板41bは、貫通配線47を二箇所、及び配線基板42bは、貫通配線47を一箇所それぞれ備えている。前記貫通配線47のうち、配線基板41bにおける側面C側に位置する貫通配線47の下面B側に位置する端部と、配線基板42bにおける貫通配線47の上面A側に位置する端部とは直接繋がっている。また、配線基板41bは、前記配線基板42bとの重ね合わせ面において、側面D側に位置する前記貫通配線47の下面B側に位置する端部と一端が繋がり、他端が該配線基板41bにおける側面Dに露呈する接続配線48を備えている。また、配線基板42bは、前記配線基板41bとの重ね合わせ面において、前記配線基板41bの側面D側に位置する前記貫通配線47の下面B側に位置する端部と一端が繋がり、他端が該配線基板42bにおける側面Dに露呈する接続配線48を備えている。これにより、前記二つの配線基板41b,42bは、それぞれ備えている各貫通配線47,47によって前記複合基板40Bの上面Aと下面Bを電気的に接続すると共に、重ね合わせ面において双方の配線基板41b,42bの主面にそれぞれ備えた側面Dに露呈する接続配線48,48によって前記複合基板40Bの上面Aと側面Dを電気的に接続している。   FIG. 11 shows a composite substrate 40B in which two wiring substrates 41b and 42b are overlapped. The wiring board 41b includes two through wirings 47, and the wiring board 42b includes one through wiring 47. Of the through wiring 47, the end located on the lower surface B side of the through wiring 47 located on the side surface C side in the wiring substrate 41 b and the end located on the upper surface A side of the through wiring 47 in the wiring substrate 42 b are directly It is connected. Further, the wiring board 41b has one end connected to the lower surface B side of the through wiring 47 located on the side surface D side and one end connected to the wiring board 42b, and the other end of the wiring board 41b on the wiring board 41b. A connection wiring 48 exposed on the side surface D is provided. Further, the wiring board 42b has one end connected to the lower surface B side of the through wiring 47 located on the side surface D side of the wiring board 41b and the other end on the overlapping surface with the wiring board 41b. The connection wiring 48 exposed to the side surface D of the wiring board 42b is provided. As a result, the two wiring boards 41b and 42b are electrically connected to the upper surface A and the lower surface B of the composite substrate 40B by the respective through wirings 47 and 47, respectively, and both wiring boards on the overlapping surface. The upper surface A and the side surface D of the composite substrate 40B are electrically connected by connection wirings 48 and 48 exposed on the side surface D provided on the main surfaces of 41b and 42b, respectively.

また、図12は、三つの配線基板41c,42c,43cを重ね合わせた複合基板40Cを示すものである。配線基板41cと配線基板42cは、貫通配線47を一箇所、及び配線基板42cは、貫通配線47を二箇所それぞれ備えている。前記貫通配線47のうち、配線基板41cにおける貫通配線47の下面B側に位置する端部と、配線基板42cにおける側面D側に位置する貫通配線47の上面A側に位置する端部とは直接繋がり、また、配線基板42cにおける側面C側に位置する貫通配線47の下面B側に位置する端部と、配線基板43cにおける貫通配線47の上面A側に位置する端部とは直接繋がっている。また、配線基板42cは、前記配線基板41cとの重ね合わせ面において、側面C側に位置する前記貫通配線47の上面A側に位置する端部と一端が繋がり、他端が該配線基板42cにおける側面Cに露呈する接続配線48、及び側面D側に位置する前記貫通配線47の下面B側に位置する端部と一端が繋がり、他端が該配線基板42cにおける側面Dに露呈する接続配線48を備えている。また、配線基板43cは、前記配線基板42cとの重ね合わせ面において、前記配線基板42cの側面D側に位置する前記貫通配線47の下面B側に位置する端部と一端が繋がり、他端が該配線基板43cにおける側面Dに露呈する接続配線48を備えている。これにより、前記三つの配線基板41c,42c,43cは、配線基板41c及び配線基板42cがそれぞれ備えている貫通配線47,47と、配線基板42cと配線基板43cとの重ね合わせ面において双方の配線基板42c,43cの主面にそれぞれ備えた側面Dに露呈する接続配線48,48によって前記複合基板40Cの上面Aと側面Dを電気的に接続すると共に、配線基板42c及び配線基板43cがそれぞれ備えている貫通配線47,47と、配線基板41cと配線基板42cとの重ね合わせ面において一方の配線基板42cの主面に備えた側面Cに露呈する接続配線48によって下面Bと側面Cを電気的に接続している。   FIG. 12 shows a composite substrate 40C in which three wiring substrates 41c, 42c, 43c are overlapped. The wiring board 41c and the wiring board 42c are provided with one through wiring 47, and the wiring board 42c is provided with two through wirings 47, respectively. Of the through wiring 47, the end portion of the wiring board 41c located on the lower surface B side of the through wiring 47 and the end portion of the wiring board 42c located on the side surface D side of the through wiring 47 are directly located on the upper surface A side. In addition, the end located on the lower surface B side of the through wiring 47 located on the side surface C side in the wiring substrate 42c and the end located on the upper surface A side of the through wiring 47 in the wiring substrate 43c are directly connected. . Further, the wiring substrate 42c has one end connected to the upper surface A side of the through wiring 47 located on the side surface C side on the overlapping surface with the wiring substrate 41c, and the other end connected to the wiring substrate 42c. The connection wiring 48 exposed on the side surface C, and the connection wiring 48 exposed on the side surface D of the wiring substrate 42c with one end connected to the end portion located on the lower surface B side of the through wiring 47 located on the side surface D side. It has. Further, the wiring substrate 43c has one end connected to the lower surface B side of the through wiring 47 that is located on the side surface D side of the wiring substrate 42c on the overlapping surface with the wiring substrate 42c, and the other end is connected to the wiring substrate 43c. A connection wiring 48 exposed on the side surface D of the wiring board 43c is provided. As a result, the three wiring boards 41c, 42c, and 43c are formed on the wiring board 41c and the wiring board 42c. The upper surface A and the side surface D of the composite substrate 40C are electrically connected by the connection wirings 48 and 48 exposed on the side surface D provided on the main surfaces of the substrates 42c and 43c, respectively, and the wiring substrate 42c and the wiring substrate 43c are respectively provided. The lower surface B and the side surface C are electrically connected by the connection wiring 48 exposed on the side surface C provided on the main surface of one wiring substrate 42c in the overlapping surface of the through wirings 47, 47 and the wiring substrate 41c and the wiring substrate 42c. Connected to.

(第五実施形態)
第五実施形態は、前記重ね合わせ面において、各々の配線基板に設けた微細孔の端部同士が連通するように、及び何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、一方の配線基板をなす基材にのみ溝を配置し、該溝に第二導電性物質を充填してなる接続配線を備えた、前記(3)に前記(a)を掛け合わせた構成のものである。
本発明の第五実施形態における複合基板としては、たとえば、図13から15に示すように、互いに重ね合わされる複数の配線基板51,52また52,53に、それぞれの基材1,2,3の対向する主面を結ぶように微細孔55が配され、該微細孔55に第一導電性物質56aを充填した貫通配線57を備えると共に、互いに重ね合わされる各々の配線基板51,52または52,53に備えた前記貫通配線57同士を、互いに重ね合わされる一方の配線基板52にだけ配置した溝54の内部に第二導電性物質56bを充填した接続配線58によって繋いだ例が挙げられる。
(Fifth embodiment)
In the fifth embodiment, the ends of the fine holes provided in each wiring board communicate with each other on the overlapping surface, and the ends of the fine holes provided in any one of the wiring boards and the wiring board The above (3) includes a connection wiring in which a groove is disposed only on a base material forming one wiring board so as to communicate with the side surface of the wiring board, and the groove is filled with a second conductive material. a) multiplied by a).
As a composite substrate in the fifth embodiment of the present invention, for example, as shown in FIGS. 13 to 15, a plurality of wiring substrates 51, 52 or 52, 53 overlapped with each other, each base material 1, 2, 3. Are provided with through-holes 57 filled with the first conductive material 56a, and each of the wiring boards 51, 52 or 52 superposed on each other. , 53 are connected to each other by a connection wiring 58 filled with a second conductive material 56b in a groove 54 disposed only on one wiring substrate 52 that is superposed on each other.

図13は、二つの配線基板51a,52aを重ね合わせた複合基板50Aを示すものである。配線基板51aは、貫通配線57を二箇所、及び配線基板52aは、貫通配線57を一箇所それぞれ備えている。また、配線基板52aは、前記配線基板51aとの重ね合わせ面において、前記配線基板51aの側面C側に位置する前記貫通配線57の下面B側に位置する端部と、該貫通配線57の上面A側に位置する端部とを繋ぐ接続配線58、及び前記配線基板51aの側面D側に位置する前記貫通配線57の下面B側に位置する端部と一端が繋がり、他端が該配線基板52aにおける側面Dに露呈する接続配線58を備えている。これにより、前記二つの配線基板51a,52aは、それぞれ備えている各貫通配線57,57と、重ね合わせ面において一方の配線基板52aの主面に備えた側面C側に位置する接続配線58によって前記複合基板50Aの上面Aと下面Bを電気的に接続すると共に、重ね合わせ面において側面Dに露呈する接続配線58によって上面Aと側面Dを電気的に接続している。   FIG. 13 shows a composite substrate 50A in which two wiring substrates 51a and 52a are overlapped. The wiring board 51a includes two through wirings 57, and the wiring board 52a includes one through wiring 57. In addition, the wiring board 52 a has an end portion located on the lower surface B side of the through wiring 57 located on the side surface C side of the wiring board 51 a and an upper surface of the through wiring 57 on the overlapping surface with the wiring board 51 a. One end of the connection wiring 58 connecting the end located on the A side and the end located on the lower surface B side of the through wiring 57 located on the side D of the wiring board 51a are connected, and the other end is connected to the wiring board. The connection wiring 58 exposed to the side surface D in 52a is provided. Thus, the two wiring boards 51a and 52a are respectively provided by the respective through wirings 57 and 57 provided therein and the connection wiring 58 located on the side C provided on the main surface of the one wiring board 52a on the overlapping surface. The upper surface A and the lower surface B of the composite substrate 50A are electrically connected, and the upper surface A and the side surface D are electrically connected by a connection wiring 58 exposed to the side surface D on the overlapping surface.

また、図14は、二つの配線基板51b,52bを重ね合わせた複合基板50Bを示すものである。配線基板51bは、貫通配線57を一箇所、及び配線基板52bは、貫通配線57を二箇所それぞれ備えている。また、配線基板52bは、前記配線基板51bとの重ね合わせ面において、側面C側に位置する該貫通配線57の上面A側に位置する端部と、前記配線基板51bの前記貫通配線57の下面B側に位置する端部と繋ぐ接続配線58、側面D側に位置する前記貫通配線57の端部の上面A側に位置する端部と一端が繋がり、他端が該配線基板52bにおける側面Dに露呈する接続配線58を備えている。これにより、前記二つの配線基板51b,52bは、それぞれ備えている各貫通配線57,57と、重ね合わせ面において一方の配線基板52bの主面に備えた側面C側に位置する接続配線58によって前記複合基板50Bの上面Aと下面Bを電気的に接続すると共に、重ね合わせ面において一方の配線基板52bの主面に備えた側面Dに露呈する接続配線58によって下面Bと側面Dを電気的に接続している。   FIG. 14 shows a composite substrate 50B in which two wiring substrates 51b and 52b are overlapped. The wiring board 51b has one through wiring 57, and the wiring board 52b has two through wiring 57. Further, the wiring board 52b has an end portion located on the upper surface A side of the through wiring 57 located on the side surface C side and a lower surface of the through wiring 57 of the wiring board 51b on the overlapping surface with the wiring board 51b. The connection wiring 58 connected to the end located on the B side, the end located on the upper surface A side of the end of the through wiring 57 located on the side D side, and one end are connected, and the other end is the side D on the wiring board 52b. The connection wiring 58 exposed to is provided. As a result, the two wiring boards 51b and 52b are respectively provided by the respective through wirings 57 and 57 provided therein and the connection wiring 58 located on the side C provided on the main surface of one wiring board 52b on the overlapping surface. The upper surface A and the lower surface B of the composite substrate 50B are electrically connected, and the lower surface B and the side surface D are electrically connected by the connection wiring 58 exposed on the side surface D provided on the main surface of one wiring substrate 52b on the overlapping surface. Connected to.

また、図15は、三つの配線基板51c,52c,53cを重ね合わせた複合基板50Cを示すものである。配線基板51cと配線基板52cは、貫通配線57を二箇所、及び配線基板53cは、貫通配線57を一箇所それぞれ備えている。前記貫通配線57のうち、配線基板51cにおける側面D側に位置する貫通配線57の下面B側に位置する端部と、配線基板52cにおける側面D側に位置する貫通配線57の上面A側に位置する端部とは直接繋がり、また、配線基板52cにおける側面C側に位置する貫通配線57の下面B側に位置する端部と、配線基板53cにおける貫通配線57の上面A側に位置する端部とは直接繋がっている。また、配線基板52cは、前記配線基板51cとの重ね合わせ面において、側面C側に位置する該貫通配線57の上面A側に位置する端部と前記配線基板51cの側面C側に位置する前記貫通配線57の下面B側に位置する端部と繋ぐ接続配線58を備えると共に、前記配線基板53cとの重ね合わせ面において、側面D側に位置する前記貫通配線57の下面B側に位置する端部と一端が繋がり、他端が該配線基板52cにおける側面Dに露呈する接続配線58を備えている。これにより、前記三つの配線基板51c,52c,53cは、それぞれ備えている各貫通配線57,57,57と、配線基板51cと配線基板52cとの重ね合わせ面において一方の配線基板52cの主面に備えた接続配線58によって前記複合基板50Cの上面Aと下面Bを電気的に接続すると共に、配線基板51c及び配線基板52cがそれぞれ備えている貫通配線57,57と、配線基板52cと配線基板53cとの重ね合わせ面において側面Dに露呈する接続配線58によって上面Aと側面Dを電気的に接続している。   FIG. 15 shows a composite substrate 50C in which three wiring substrates 51c, 52c, and 53c are overlapped. The wiring board 51c and the wiring board 52c have two through wirings 57, and the wiring board 53c has one through wiring 57. Of the through-wiring 57, the end located on the lower surface B side of the through-wiring 57 located on the side surface D side of the wiring substrate 51c and the upper surface A side of the through-wiring 57 located on the side surface D side of the wiring substrate 52c. And the end located on the lower surface B side of the through wiring 57 located on the side C side of the wiring substrate 52c and the end located on the upper surface A side of the through wiring 57 on the wiring substrate 53c. And are directly connected. Further, the wiring board 52c has an end portion located on the upper surface A side of the through wiring 57 located on the side surface C side and the side surface C side of the wiring board 51c on the overlapping surface with the wiring board 51c. The connection wiring 58 connected to the end located on the lower surface B side of the through wiring 57 is provided, and the end positioned on the lower surface B side of the through wiring 57 positioned on the side surface D side on the overlapping surface with the wiring substrate 53c. One end is connected to the other end, and the other end is provided with a connection wiring 58 exposed to the side surface D of the wiring substrate 52c. As a result, the three wiring boards 51c, 52c, 53c are respectively provided on the main surface of one wiring board 52c in the overlapping surface of the respective through wirings 57, 57, 57 and the wiring board 51c and the wiring board 52c. The upper surface A and the lower surface B of the composite substrate 50C are electrically connected by the connection wiring 58 provided for the wiring board 51C, the through wirings 57 and 57 provided in the wiring board 51c and the wiring board 52c, and the wiring board 52c and the wiring board, respectively. The upper surface A and the side surface D are electrically connected by the connection wiring 58 exposed to the side surface D on the overlapping surface with 53c.

(第六実施形態)
第六実施形態は、前記重ね合わせ面において、各々の配線基板に設けた微細孔の端部同士が連通するように、及び何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、双方の配線基板をなす基材にそれぞれ溝を配置し、該溝に第二導電性物質を充填してなる接続配線を備えた、前記(3)に前記(b)を掛け合わせた構成のものである。
本発明の第六実施形態における複合基板としては、たとえば、図16から18に示すように、互いに重ね合わされる複数の配線基板61,62また62,63に、それぞれの基材1,2,3の対向する主面を結ぶように微細孔65が配され、該微細孔65に第一導電性物質66aを充填した貫通配線67を備えると共に、互いに重ね合わされる各々の配線基板61,62または62,63に備えた前記貫通配線67の端部と該配線基板の側面とを、互いに重ね合わされる双方の配線基板61,62または62,63にそれぞれ配置した溝64の内部に第二導電性物質66bを充填した接続配線68によって繋いだ例が挙げられる。
(Sixth embodiment)
In the sixth embodiment, the ends of the fine holes provided in each wiring board communicate with each other on the overlapping surface, and the ends of the fine holes provided in any one of the wiring boards and the wiring board In (3), the above (3) includes a connection wiring formed by arranging grooves in the base material forming both wiring boards so as to communicate with the side surfaces of the wiring board, and filling the grooves with the second conductive material. b) is multiplied.
As a composite substrate in the sixth embodiment of the present invention, for example, as shown in FIGS. 16 to 18, a plurality of wiring substrates 61, 62 or 62, 63 that are superposed on each other are respectively base materials 1, 2, 3. Are provided with through-holes 67 filled with the first conductive material 66a, and the respective wiring boards 61, 62, or 62 overlapped with each other. 63, the end of the through wiring 67 and the side surface of the wiring board provided in each of the wiring boards 61, 62 or 62, 63, which are superposed on each other, inside the groove 64, respectively. An example in which connection lines 68 filled with 66b are connected.

図16は、二つの配線基板61a,62aを重ね合わせた複合基板60Aを示すものである。配線基板61aは、貫通配線67を二箇所、及び配線基板62aは、貫通配線67を一箇所それぞれ備えている。また、配線基板61aは、前記配線基板62aとの重ね合わせ面において、側面D側に位置する前記貫通配線67の下面B側に位置する端部と一端が繋がり、他端が該配線基板61aにおける側面Dに露呈する接続配線68を備えている。また、配線基板62aは、前記配線基板61aとの重ね合わせ面において、前記配線基板61aの側面C側に位置する前記貫通配線67の下面B側に位置する端部と、該貫通配線67の上面A側に位置する端部とを繋ぐ接続配線68を備えている。これにより、前記二つの配線基板61a,62aは、それぞれ備えている各貫通配線67,67と、重ね合わせ面において一方の配線基板62aの主面に備えた接続配線68によって前記複合基板60Aの上面Aと下面Bを電気的に接続すると共に、重ね合わせ面において一方の配線基板61aの主面に備えた側面Dに露呈する接続配線68によって上面Aと側面Dを電気的に接続している。   FIG. 16 shows a composite substrate 60A in which two wiring substrates 61a and 62a are overlapped. The wiring board 61a includes two through wirings 67 and the wiring board 62a includes one through wiring 67, respectively. Further, the wiring board 61a has one end connected to the lower surface B side of the through wiring 67 located on the side surface D side and one end connected to the wiring board 62a, and the other end is connected to the wiring board 61a. A connection wiring 68 exposed on the side surface D is provided. In addition, the wiring board 62 a has an end portion located on the lower surface B side of the through wiring 67 located on the side surface C side of the wiring board 61 a and an upper surface of the through wiring 67 on the overlapping surface with the wiring board 61 a. A connection wiring 68 is provided to connect the end located on the A side. As a result, the two wiring boards 61a and 62a are provided on the upper surface of the composite board 60A by the respective through wirings 67 and 67 and the connection wiring 68 provided on the main surface of the one wiring board 62a on the overlapping surface. A and the lower surface B are electrically connected to each other, and the upper surface A and the side surface D are electrically connected by a connection wiring 68 exposed on the side surface D provided on the main surface of one wiring board 61a on the overlapping surface.

また、図17は、二つの配線基板61b,62bを重ね合わせた複合基板60Bを示すものである。配線基板61bは、貫通配線67を二箇所、及び配線基板62bは、貫通配線67を一箇所それぞれ備えている。また、配線基板61bは、前記配線基板62bとの重ね合わせ面において、側面D側に位置する前記貫通配線67の下面B側に位置する端部と一端が繋がり、他端が該配線基板61bにおける側面Dに露呈する接続配線68を備えている。また、配線基板62bは、前記配線基板61bとの重ね合わせ面において、前記配線基板61bの側面C側に位置する前記貫通配線67の下面B側に位置する端部と、該貫通配線67の上面A側に位置する端部とを繋ぐ接続配線68、及び前記配線基板61bの側面D側に位置する前記貫通配線67の下面B側に位置する端部と一端が繋がり、他端が該配線基板62bにおける側面Dに露呈する接続配線68を備えている。これにより、前記二つの配線基板61b,62bは、それぞれ備えている各貫通配線67,67と、重ね合わせ面において一方の配線基板62bの主面に備えた側面C側に位置する接続配線68によって前記複合基板60Bの上面Aと下面Bを電気的に接続すると共に、重ね合わせ面において双方の配線基板61b及び62bの主面に備えた側面Dに露呈する接続配線68によって上面Aと側面Dを電気的に接続している。   FIG. 17 shows a composite substrate 60B in which two wiring substrates 61b and 62b are overlapped. The wiring board 61b includes two through wirings 67, and the wiring board 62b includes one through wiring 67. The wiring board 61b has one end connected to the lower surface B side of the through wiring 67 located on the side surface D side and one end connected to the wiring board 62b, and the other end of the wiring board 61b on the wiring board 61b. A connection wiring 68 exposed on the side surface D is provided. In addition, the wiring board 62b has an end portion located on the lower surface B side of the through wiring 67 located on the side surface C side of the wiring board 61b and an upper surface of the through wiring 67 on the overlapping surface with the wiring board 61b. One end is connected to the connection wiring 68 connecting the end located on the A side, and the end located on the lower surface B side of the through wiring 67 located on the side surface D side of the wiring board 61b, and the other end is connected to the wiring board. The connection wiring 68 exposed to the side surface D in 62b is provided. As a result, the two wiring boards 61b and 62b are provided by the respective through wirings 67 and 67 provided therein and the connection wiring 68 positioned on the side C provided on the main surface of the one wiring board 62b on the overlapping surface. The upper surface A and the lower surface B of the composite substrate 60B are electrically connected to each other, and the upper surface A and the side surface D are connected by the connection wiring 68 that is exposed on the side surface D provided on the main surface of both the wiring substrates 61b and 62b on the overlapping surface. Electrically connected.

また、図18は、三つの配線基板61c,62c,63cを重ね合わせた複合基板60Cを示すものである。配線基板61cと配線基板62cは、貫通配線67を二箇所、及び配線基板63cは、貫通配線67を一箇所それぞれ備えている。前記貫通配線67のうち、配線基板61cにおける側面D側に位置する貫通配線67の下面B側に位置する端部と、配線基板62cにおける側面D側に位置する貫通配線67の上面A側に位置する端部とは直接繋がっている。また、配線基板62cは、前記配線基板61cとの重ね合わせ面において、側面C側に位置する該貫通配線67の上面A側に位置する端部と、前記配線基板61cの側面C側に位置する前記貫通配線67の下面B側に位置する端部とを繋ぐ接続配線68を備えると共に、前記配線基板63cとの重ね合わせ面において、側面D側に位置する前記貫通配線67の下面B側に位置する端部と一端が繋がり、他端が該配線基板62cにおける側面Dに露呈する接続配線68を備えている。また、配線基板63cは、前記配線基板62cとの重ね合わせ面において、該貫通配線67の上面A側に位置する端部と、前記配線基板62cの側面C側に位置する前記貫通配線67の下面B側に位置する端部とを繋ぐ接続配線68を備えている。これにより、前記三つの配線基板61c,62c,63cは、それぞれ備えている各貫通配線67,67,67と、配線基板61cと配線基板62cとの重ね合わせ面において一方の配線基板62cの主面に備えた接続配線68、及び配線基板62cと配線基板63cとの重ね合わせ面において一方の配線基板63cの主面に備えた接続配線68によって前記複合基板60Cの上面Aと下面Bを電気的に接続すると共に、配線基板61c及び配線基板62cがそれぞれ備えている貫通配線67,67と、前記配線基板62cと配線基板63cとの重ね合わせ面において他方の配線基板62cの主面に備えた側面Dに露呈する接続配線68によって上面Aと側面Dを電気的に接続している。   FIG. 18 shows a composite substrate 60C in which three wiring substrates 61c, 62c, and 63c are overlapped. The wiring board 61c and the wiring board 62c are provided with two through wirings 67, and the wiring board 63c is provided with one through wiring 67, respectively. Of the through-wiring 67, the end located on the lower surface B side of the through-wiring 67 located on the side surface D side of the wiring substrate 61c and the upper surface A side of the through-wiring 67 located on the side surface D side of the wiring substrate 62c. It is directly connected to the end. Further, the wiring board 62c is located on the side surface C side of the wiring board 61c and the end part located on the upper surface A side of the through wiring 67 located on the side face C side on the overlapping surface with the wiring board 61c. A connection wiring 68 is provided to connect an end portion located on the lower surface B side of the through wiring 67, and is located on the lower surface B side of the through wiring 67 located on the side surface D side on the overlapping surface with the wiring substrate 63 c. One end is connected to the other end, and the other end is provided with a connection wiring 68 exposed to the side surface D of the wiring board 62c. Further, the wiring board 63c has an end portion located on the upper surface A side of the through wiring 67 and a lower surface of the through wiring 67 located on the side surface C side of the wiring board 62c on the overlapping surface with the wiring board 62c. A connection wiring 68 is provided to connect the end located on the B side. As a result, the three wiring boards 61c, 62c, 63c are arranged on the main surface of one wiring board 62c in the overlapping surface of the respective through wirings 67, 67, 67 and the wiring board 61c and the wiring board 62c. The upper surface A and the lower surface B of the composite substrate 60C are electrically connected to each other by the connection wiring 68 provided in the connection board 68 and the connection wiring 68 provided on the main surface of one wiring board 63c on the overlapping surface of the wiring board 62c and the wiring board 63c. The side surface D provided on the main surface of the other wiring substrate 62c in the overlapping surface of the wiring substrate 61c and the wiring substrate 62c and the through wirings 67 and 67 respectively provided in the wiring substrate 61c and the wiring substrate 62c and the wiring substrate 62c and the wiring substrate 63c. The upper surface A and the side surface D are electrically connected by the connection wiring 68 exposed to the surface.

(第七実施形態)
第七実施形態は、互いに重ね合わせる複数の基板のうち、少なくとも1つが異なる材料からなる構成のものである。
本発明の第七実施形態における複合基板としては、たとえば、図19に示すように、互いに重ね合わされる一方の配線基板71を、ガラスよりなる基材1を用いたガラス基板とし、他方の配線基板72を、シリコンよりなる基材2を用いたシリコン基板とする、二つの配線基板71,72を重ね合わせた複合基板70の例が挙げられる。
複合基板70は、それぞれの配線基板を構成する各基板の材料が互いに異なる以外は、前述した図2に示す複合基板10Bと同様の構成である。すなわち、複合基板70を構成するガラス基板71とシリコン基板72は、共に貫通配線77を二箇所ずつ備えている。また、シリコン基板72は、前記ガラス基板71との重ね合わせ面において、側面C側に位置する前記貫通配線77の上面A側に位置する端部と前記ガラス基板71における側面C側に位置する貫通配線77の下面B側に位置する端部とを繋ぐ接続配線78と、側面D側に位置する前記貫通配線77の上面A側に位置する端部と前記ガラス基板71における側面D側に位置する貫通配線77の下面B側に位置する端部とを繋ぐ接続配線78を備えている。
これにより、互いに重ね合わさる配線基板を構成する基材の少なくとも1つが異なる材料からなる構成であっても、前記複合基板70の上面Aと下面Bとを電気的に接続する構成とすることができる。また、異種基材を接合することにより、たとえば、本実施形態で示したガラス基板のような透明基材を接合することで、外部からの光がガラス基板を透過するため、シリコン基板に対して光学デバイスを集積することが可能となる等、更なる高機能化を達成できる。
(Seventh embodiment)
In the seventh embodiment, at least one of a plurality of substrates stacked on each other is configured of different materials.
As a composite substrate in the seventh embodiment of the present invention, for example, as shown in FIG. 19, one wiring substrate 71 overlapped with each other is a glass substrate using a base material 1 made of glass, and the other wiring substrate is used. An example of a composite substrate 70 in which two wiring substrates 71 and 72 are superposed is shown in which 72 is a silicon substrate using the base material 2 made of silicon.
The composite substrate 70 has the same configuration as the composite substrate 10B shown in FIG. 2 described above, except that the materials of the respective substrates constituting each wiring substrate are different from each other. That is, the glass substrate 71 and the silicon substrate 72 constituting the composite substrate 70 are each provided with two through wirings 77. Further, the silicon substrate 72 has an end portion located on the upper surface A side of the through wiring 77 located on the side surface C side and a penetration located on the side surface C side of the glass substrate 71 on the overlapping surface with the glass substrate 71. The connection wiring 78 that connects the end portion located on the lower surface B side of the wiring 77, the end portion located on the upper surface A side of the through wiring 77 located on the side surface D side, and the side surface D side of the glass substrate 71. A connection wiring 78 that connects an end portion of the through wiring 77 on the lower surface B side is provided.
As a result, even when at least one of the base materials constituting the wiring boards stacked on each other is made of a different material, the upper surface A and the lower surface B of the composite substrate 70 can be electrically connected. . In addition, by joining different kinds of base materials, for example, by joining a transparent base material such as the glass substrate shown in the present embodiment, light from the outside passes through the glass substrate. Further enhancement of functionality can be achieved, such as integration of optical devices.

(第八実施形態)
本発明の第八実施形態における複合基板としては、少なくとも一方の主面に配線やバンプ、樹脂層などを形成した構成のものであり、たとえば、図20に示すような複合基板80の例が挙げられる。図20では、複合基板80の下面Bに配線81とバンプ82と樹脂層83が形成されている点のみ、図19に示す複合基板70とは相違し、それ以外は同じ構成となっている。
これにより、配線基板として、様々なデバイスの高密度パッケージやSiPに応用することができる。また、配線81を貫通配線77と接続させることで、さらに下面B上で様々なパターンを形成することができるので、より一層配線基板としての自由度が増すものとなる。
(Eighth embodiment)
The composite substrate in the eighth embodiment of the present invention has a configuration in which wirings, bumps, a resin layer, etc. are formed on at least one main surface. For example, an example of a composite substrate 80 as shown in FIG. It is done. 20 is different from the composite substrate 70 shown in FIG. 19 only in that the wiring 81, the bumps 82, and the resin layer 83 are formed on the lower surface B of the composite substrate 80, and the other configurations are the same.
Thereby, it can apply to the high-density package and SiP of various devices as a wiring board. Moreover, since various patterns can be formed on the lower surface B by connecting the wiring 81 with the through wiring 77, the degree of freedom as a wiring board is further increased.

(第九実施形態)
本発明の第九実施形態における複合基板としては、配線基板を構成する基材の内部に機能素子を埋設した構成のものであり、たとえば、図21に示すような複合基板90の例が挙げられる。図21では、配線基板91と配線基板92で挟まれるように、配線基板92の一面に機能素子99が埋設されている点のみ、図6に示す複合基板20Cとは相違し、それ以外は同じ構成となっている。前記機能素子99としては、たとえば、コンデンサや抵抗などの受動素子、あるいは各種センサなどのMEMSデバイスが挙げられる。
これにより、より高機能の配線基板を提供することができる。また、機能素子99が二つの配線基板の間に挟み込まれ、あるいは密閉された形態とすることができるので、外力に対して耐久性に優れた構成が得られる。あらに、機能素子99が外部環境に曝される虞がないので、耐環境性の改善も図ることができる。
(Ninth embodiment)
The composite substrate according to the ninth embodiment of the present invention has a configuration in which a functional element is embedded in a base material constituting a wiring substrate. For example, an example of a composite substrate 90 as shown in FIG. . 21 is different from the composite substrate 20C shown in FIG. 6 only in that the functional element 99 is embedded on one surface of the wiring substrate 92 so as to be sandwiched between the wiring substrate 91 and the wiring substrate 92, and otherwise the same. It has a configuration. Examples of the functional element 99 include passive elements such as capacitors and resistors, or MEMS devices such as various sensors.
Thereby, a more highly functional wiring board can be provided. Further, since the functional element 99 can be sandwiched or sealed between the two wiring boards, a configuration excellent in durability against external force can be obtained. Furthermore, since there is no possibility that the functional element 99 is exposed to the external environment, it is possible to improve the environmental resistance.

続いて、図22及び図23を用いて、本発明における複合基板の製造方法の一例を説明する。
図22は、本発明に係る複合基板の第一製造方法の一例を工程順に示した断面模式図である。本実施形態では、二つの基材を重ね合わせる場合について説明し、各基材として、何れも厚さが200μmのシリコン基材を用いる。なお、本発明では、基材としてシリコン基材を用いたが、本発明はこれに限定されず、ガリウム砒素(GaAs)やインジウムリン(InP)など他の半導体基材を使用することができるものである。
Next, an example of a method for manufacturing a composite substrate in the present invention will be described with reference to FIGS.
FIG. 22 is a schematic cross-sectional view showing an example of a first method for manufacturing a composite substrate according to the present invention in the order of steps. In this embodiment, a case where two base materials are overlapped will be described, and a silicon base material having a thickness of 200 μm is used as each base material. In the present invention, a silicon substrate is used as the substrate. However, the present invention is not limited to this, and other semiconductor substrates such as gallium arsenide (GaAs) and indium phosphide (InP) can be used. It is.

はじめに、図22(a)に示すように、第一配線基板及び第二配線基板をそれぞれ構成するシリコン基材101及び102に、対向する主面を結ぶように微細孔115をそれぞれ形成する。
次いで、図22(b)に示すように、前記第一配線基板と第二配線基板とを重ね合わせた面において、前記第一配線基板と前記第二配線基板とを構成する各々のシリコン基材101及び102に設けた微細孔115の端部同士が連通するように、一方のシリコン基材102の重ね合わせ面に溝114を形成する。
First, as shown in FIG. 22A, the fine holes 115 are formed in the silicon bases 101 and 102 constituting the first wiring substrate and the second wiring substrate, respectively, so as to connect the opposing main surfaces.
Next, as shown in FIG. 22B, each silicon substrate constituting the first wiring board and the second wiring board on the surface where the first wiring board and the second wiring board are overlapped with each other. A groove 114 is formed on the overlapping surface of one silicon substrate 102 so that the ends of the micro holes 115 provided in 101 and 102 communicate with each other.

前記溝114及び前記貫通孔115は、たとえばシリコン基板をDeep-Reactive Ion Etching (DRIEと略記)法によりエッチングすることで形成することができる。DRIE法とは、エッチングガスに六フッ化硫黄(SF)を用い、高密度プラズマによるエッチングと、側壁へのパッシベーション成膜を交互に行なうBoschプロセスにより、シリコン基板を深堀エッチングするものである。なお、前記溝114及び前記貫通孔115の形成方法は、前記DRIE法に限定されず、水酸化カリウム(KOH)水溶液等によるウェットエッチング法や、レーザやマイクロドリル等による物理的な加工、及びこれらを適宜組み合わせたものを用いることができる。
その際、前記溝114は、たとえば深さを20μmとすることができるが、本発明はこれに限定されず、適宜設定することができる。また、前記微細孔115は、たとえば孔径を50μmとすることができるが、やはり本発明はこれに限定されず、それぞれ適宜設定することができる。
The groove 114 and the through hole 115 can be formed, for example, by etching a silicon substrate by a deep-reactive ion etching (abbreviated as DRIE) method. In the DRIE method, sulfur hexafluoride (SF 6 ) is used as an etching gas, and a silicon substrate is deeply etched by a Bosch process in which etching by high-density plasma and passivation film formation on a sidewall are alternately performed. The formation method of the groove 114 and the through-hole 115 is not limited to the DRIE method, but is a wet etching method using a potassium hydroxide (KOH) aqueous solution or the like, a physical process using a laser or a micro drill, and the like. Those appropriately combined can be used.
At this time, the depth of the groove 114 can be set to 20 μm, for example, but the present invention is not limited to this and can be set as appropriate. The fine holes 115 can have a hole diameter of, for example, 50 μm, but the present invention is not limited to this, and can be set as appropriate.

さらに、図22(c)に示すように、前記第一配線基板と第二配線基板とを重ね合わせた状態において、各々のシリコン基材101及び102の外面と、前記溝114と前記微細孔115の各内壁面を絶縁処理して絶縁部109を設ける。この絶縁部109は、各々のシリコン基材101及び102の重ね合わせ前、もしくは重ね合わせ接合後の何れに設けても良い。この際、前記絶縁部109は、たとえば本実施形態の場合であれば、シリコン基板を高温で処理する熱酸化によりSiOからなる絶縁層を形成することができる。また、絶縁部を設ける方法はこれに限定されず、テトラエトキシシラン(TEOS)やシラン(SiH)原料としたプラズマCVD、絶縁樹脂のコーティング、およびこれらを適宜組み合わせたものを用いることができる。
なお、各々のシリコン基材101及び102の接合は、たとえば常温接合により行うことができる。
Further, as shown in FIG. 22C, in the state where the first wiring board and the second wiring board are overlapped, the outer surface of each of the silicon base materials 101 and 102, the groove 114, and the fine hole 115 are provided. Insulating portions 109 are provided by insulating each inner wall surface. This insulating portion 109 may be provided either before or after the overlapping of the silicon substrates 101 and 102. At this time, in the case of the present embodiment, for example, the insulating portion 109 can form an insulating layer made of SiO 2 by thermal oxidation in which the silicon substrate is processed at a high temperature. The method for providing the insulating portion is not limited to this, and plasma CVD using tetraethoxysilane (TEOS) or silane (SiH 4 ) as a raw material, coating with an insulating resin, and a combination of these may be used as appropriate.
The silicon substrates 101 and 102 can be bonded by, for example, room temperature bonding.

そして、図22(d)に示すように、各々のシリコン基材101及び102の外面と、前記溝114と前記微細孔115の各内壁面に絶縁部109を設けた後、前記第一配線基板と第二配線基板とを重ね合わせた状態として、前記溝114と前記微細孔115の内部に導電性物質116を一緒に充填する。   Then, as shown in FIG. 22 (d), after the insulating portions 109 are provided on the outer surfaces of the respective silicon base materials 101 and 102, and the inner wall surfaces of the grooves 114 and the fine holes 115, the first wiring board is formed. The conductive material 116 is filled together in the groove 114 and the fine hole 115 in a state where the first wiring board and the second wiring board are overlapped.

これにより、基材の対向する主面を結ぶように微細孔を配し、該微細孔に導電性物質を充填してなる貫通配線と、第一配線基板と第二配線基板との重ね合わせ面において、各々の配線基板に設けた微細孔の端部同士が連通するように、一方の配線基板をなす基材にのみ溝を配置し、該溝に導電性物質を充填してなる接続配線を備えた複合基板100Aとすることができる。   Thereby, a fine hole is arranged so as to connect the opposing main surfaces of the base material, and a through wiring formed by filling the fine hole with a conductive substance, and an overlapping surface of the first wiring board and the second wiring board In this case, a connection wiring formed by arranging a groove only in the base material forming one wiring board and filling the groove with a conductive substance so that the ends of the fine holes provided in each wiring board communicate with each other. The composite substrate 100A may be provided.

また、本発明の複合基板は、配線基板を構成する基材として上述した半導体基材に限らず、絶縁性基材を用いることもできる。もちろん、半導体基材と絶縁性基材を組み合わせたものとしても良い。
以下、本発明の複合基板の第二の製造方法として、配線基板を構成する基材として絶縁基材を用いた場合について説明する。
図23は、本発明に係る複合基板の第二製造方法の一例を工程順に示した断面模式図である。本実施形態では、各絶縁性基材として、何れも厚さが300μmのガラス基材を用いる。なお、本実施形態では、絶縁性基材としてガラス基材を用いたが、本発明はこれに限定されず、セラミックなど他の絶縁性基板を使用しても良い。
The composite substrate of the present invention is not limited to the semiconductor substrate described above as a substrate constituting the wiring substrate, and an insulating substrate can also be used. Of course, it is good also as what combined the semiconductor base material and the insulating base material.
Hereinafter, a case where an insulating base material is used as a base material constituting the wiring board will be described as a second manufacturing method of the composite board of the present invention.
FIG. 23 is a schematic cross-sectional view showing an example of a second method for manufacturing a composite substrate according to the present invention in the order of steps. In this embodiment, a glass substrate having a thickness of 300 μm is used as each insulating substrate. In the present embodiment, a glass substrate is used as the insulating substrate, but the present invention is not limited to this, and other insulating substrates such as ceramics may be used.

はじめに、図23(a)に示すように、半導体基材と同様、第三配線基板及び第四配線基板をそれぞれ構成するガラス基材103及び104に、対向する主面を結ぶように微細孔115をそれぞれ形成する。
次いで、図23(b)に示すように、前記第三配線基板と第四配線基板とを重ね合わせた面において、前記第三配線基板と前記第四配線基板とを構成する各々のガラス基材103及び104に設けた微細孔115の端部同士が連通するように、一方のガラス基材104の重ね合わせ面に溝114を形成する。
First, as shown in FIG. 23A, as in the case of the semiconductor substrate, the fine holes 115 are formed so as to connect the opposing main surfaces to the glass substrates 103 and 104 constituting the third wiring substrate and the fourth wiring substrate, respectively. Respectively.
Next, as shown in FIG. 23 (b), each glass substrate constituting the third wiring board and the fourth wiring board on the surface where the third wiring board and the fourth wiring board are overlaid. Grooves 114 are formed on the overlapping surface of one glass substrate 104 so that the ends of the fine holes 115 provided in 103 and 104 communicate with each other.

さらに、図23(c)に示すように、各々ガラス基材103及び104に設けた微細孔115の端部同士が前記溝114を介して連通するように各々のガラス基材103及び104を重ね合わせ接合する。
そして、図23(d)に示すように、前記第三配線基板と第四配線基板とを重ね合わせた状態として、前記溝114と前記微細孔115の内部に導電性物質116を一緒に充填する。
Furthermore, as shown in FIG. 23 (c), the glass substrates 103 and 104 are overlapped so that the ends of the fine holes 115 provided in the glass substrates 103 and 104 communicate with each other through the groove 114, respectively. Match and join.
Then, as shown in FIG. 23D, the third wiring board and the fourth wiring board are overlapped with each other, and the inside of the groove 114 and the fine hole 115 is filled with the conductive material 116 together. .

これにより、基材の対向する主面を結ぶように微細孔を配し、該微細孔に導電性物質を充填してなる貫通配線と、第三配線基板と第四配線基板との重ね合わせ面において、各々の配線基板に設けた微細孔の端部同士が連通するように、一方の配線基板をなす基材にのみ溝を配置し、該溝に導電性物質を充填してなる接続配線を備えた複合基板100Bとすることができる。   Thereby, a fine hole is arranged so as to connect the opposing main surfaces of the base material, and the through-hole wiring formed by filling the fine hole with a conductive substance, and the overlapping surface of the third wiring board and the fourth wiring board In this case, a connection wiring formed by arranging a groove only in the base material forming one wiring board and filling the groove with a conductive substance so that the ends of the fine holes provided in each wiring board communicate with each other. The composite substrate 100B can be provided.

前記導電性物質116としては、たとえば、金錫(Au80wt%−Sn20wt%)を用い、溶融金属吸引法により充填することができる。また、本発明はこれに限定されず、異なる組成を有する金錫合金や、錫(Sn)、インジウム(In)等の金属、また、錫鉛(Sn−Pb)系、錫(Sn)基、鉛(Pb)基、金(Au)基、インジウム(In)基、アルミニウム(Al)基等のはんだを使用することもできる。   As the conductive material 116, for example, gold tin (Au 80 wt% -Sn 20 wt%) can be used and filled by a molten metal suction method. In addition, the present invention is not limited to this, gold-tin alloys having different compositions, metals such as tin (Sn) and indium (In), tin-lead (Sn—Pb), tin (Sn) groups, Solders such as a lead (Pb) group, a gold (Au) group, an indium (In) group, and an aluminum (Al) group can also be used.

なお、上述した複合基板の製造方法では、何れも微細孔を配した基材の対向する主面の何れか一方に、一方の端部が前記微細孔の端部と連通し、他方の端部が前記基材の該主面上に止まる溝を形成した場合について説明したが、本発明では、前記溝の形成方法と同様の方法により、微細孔を配した基材の対向する主面の両方に、一方の端部が前記微細孔の端部と連通し、他方の端部が前記基材の該主面上に止まる溝を形成する場合や、前記溝に換えてもしくは前記溝と共に、微細孔を配した基材の対向する主面の何れか一方もしくは両方に、一方の端部が前記微細孔の端部と連通し、他方の端部が前記基材の側面に達する溝を形成するようにしても良い。   In the above-described method for manufacturing a composite substrate, any one of the opposing main surfaces of the base material provided with micropores has one end communicating with the end of the micropore, and the other end. However, in the present invention, both of the opposing main surfaces of the base material provided with the fine holes are formed by the same method as the groove forming method. In addition, when one end portion communicates with the end portion of the fine hole and the other end portion forms a groove that stops on the main surface of the base material, or in place of the groove or together with the groove, Either or both of the opposing main surfaces of the base material provided with holes are formed with grooves in which one end portion communicates with the end portion of the fine hole and the other end portion reaches the side surface of the base material. You may do it.

以上のように、基材の対向する主面を結ぶように微細孔が配され、該微細孔に第一導電性物質を充填してなる貫通配線を備えた配線基板を複数用い、互いに重ね合わせた面において、各々の配線基板に設けた微細孔の端部同士が連通するように、及び/又は、何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、一方もしくは両方の配線基板をなす基材の重ね合わせ面に溝を配置し、該溝の内部に第二導電性物質を充填することにより、基材表面の平坦化を可能とし、電気的な信頼性が高く、自由度の高い複合基板を、工数が少なく形成することができる。   As described above, fine holes are arranged so as to connect the opposing main surfaces of the base material, and a plurality of wiring boards provided with through wires formed by filling the fine holes with the first conductive material are overlapped with each other. On the other side, the ends of the fine holes provided in each wiring board communicate with each other and / or the ends of the fine holes provided in any one of the wiring boards communicate with the side surfaces of the wiring board. As described above, by arranging a groove on the overlapping surface of the base material forming one or both of the wiring boards and filling the inside of the groove with the second conductive material, the surface of the base material can be flattened, A composite substrate having high electrical reliability and a high degree of freedom can be formed with fewer man-hours.

本発明に係る複合基板の第一実施形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of 1st embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第一実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 1st embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第一実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 1st embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第二実施形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of 2nd embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第二実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 2nd embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第二実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 2nd embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第三実施形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of 3rd embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第三実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 3rd embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第三実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 3rd embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第四実施形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of 4th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第四実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 4th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第四実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 4th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第五実施形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of 5th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第五実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 5th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第五実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 5th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第六実施形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of 6th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第六実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 6th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第六実施形態の他の一例を示す概略断面図である。It is a schematic sectional drawing which shows another example of 6th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第七実施形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of 7th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第八実施形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of 8th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第九実施形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of 9th embodiment of the composite substrate which concerns on this invention. 本発明に係る複合基板の第一製造方法の一例を工程順に示した断面模式図である。It is the cross-sectional schematic diagram which showed an example of the 1st manufacturing method of the composite substrate which concerns on this invention in process order. 本発明に係る複合基板の第二製造方法の一例を工程順に示した断面模式図である。It is the cross-sectional schematic diagram which showed an example of the 2nd manufacturing method of the composite substrate which concerns on this invention in process order. 従来の配線基板の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of the conventional wiring board.

符号の説明Explanation of symbols

1、2、3 基材、10(10A、10B、10C) 複合基板、11、12、13 配線基板、14 溝、15 微細孔、16a 第一導電性物質、16b 第二導電性物質、17 貫通配線、18 接続配線。
1, 2, 3 Base material, 10 (10A, 10B, 10C) Composite substrate, 11, 12, 13 Wiring substrate, 14 Groove, 15 Fine hole, 16a First conductive material, 16b Second conductive material, 17 Through Wiring, 18 Connection wiring.

Claims (11)

基材の対向する主面を結ぶように微細孔を配し、該微細孔に第一導電性物質を充填してなる貫通配線を備えた配線基板を複数用い、前記主面の一方又は両方を重ね合わせてなり、前記貫通配線と電気的に接続するデバイスを、該配線基板の重ね合わせ面以外の表面に実装するための複合基板であって、
前記複合基板を構成する前記配線基板は全て半導体基材からなり、
前記配線基板同士を重ね合わせた面において、各々の配線基板に設けた微細孔の端部同士が連通するように、及び/又は、何れか一方の配線基板に設けた微細孔の端部と該配線基板の側面とが連通するように、一方もしくは両方の配線基板をなす基材の重ね合わせ面に溝を配置し、該溝に第二導電性物質を充填してなることを特徴とする複合基板。
Using a plurality of wiring boards provided with through holes formed by connecting fine holes so as to connect the opposing main surfaces of the base material, and filling the fine holes with the first conductive material, one or both of the main surfaces is used A composite substrate for mounting a device electrically connected to the through wiring on a surface other than the overlapping surface of the wiring substrate ,
All the wiring substrate constituting the composite substrate comprises a semiconductor substrate,
The ends of the fine holes provided in each wiring board communicate with each other on the surface where the wiring boards are overlapped, and / or the ends of the fine holes provided in any one of the wiring boards and the A composite in which a groove is arranged on the overlapping surface of the base material forming one or both of the wiring boards so as to communicate with the side surface of the wiring board, and the groove is filled with a second conductive material. substrate.
前記重ね合わせ面に、デバイスが備えられていることを特徴とする請求項1に記載の複合基板。The composite substrate according to claim 1, wherein a device is provided on the overlapping surface. 前記配線基板同士の重ね合わせ面に位置する接続配線は、該重ね合わせ面をなす、両方の配線基板を跨ぐように形成されていることを特徴とする請求項1または2に記載の複合基板。 Composite substrate according to claim 1 or 2 connection wiring is characterized in that it is formed so as to form said overlapping surfaces, cross the both of the wiring board positioned on overlapping surfaces of the wiring boards. 前記接続配線は、一端が前記貫通配線と電気的に接続され、他端が配線基板の側面に露呈するように形成されることを特徴とする請求項1からのいずれか1項に記載の複合基板。 The connection wire has one end connected to the through wiring and electrical and the other end of any one of claims 1 to 3, characterized in that it is formed so as to be exposed on the side surfaces of the wiring substrate Composite board. 前記第一導電性物質は微細孔に、前記第二導電性物質は溝に、それぞれ設けられ、両者は一緒に充填され、連続体をなすことを特徴とする請求項1からのいずれか1項に記載の複合基板。 Said first conductive material is microporous, the second conductive material trench, respectively provided, both filled with, any of claims 1, wherein the forming a continuous body 4 1 A composite substrate according to Item. 前記複合基板は、前記貫通配線が、デバイスを搭載した際にバンプピッチの整合をとる、または、前記基材に内包する機能素子と電気的に接続するために用いられるものであることを特徴とする請求項1から5のいずれか1項に記載の複合基板。The composite substrate is characterized in that the through wiring is used for matching a bump pitch when a device is mounted, or for electrically connecting to a functional element included in the base material. The composite substrate according to any one of claims 1 to 5. 基材の対向する主面を結ぶように微細孔を配し、該微細孔に導電性物質を充填してなる貫通配線を備えた第一配線基板と第二配線基板とを互いに重ね合わせてなり、前記貫通配線と電気的に接続するデバイスを、該第一配線基板および該第二配線基板の重ね合わせ面以外の表面に実装するための複合基板の製造方法であって、
前記第一配線基板と前記第二配線基板を構成する各基材として、いずれも半導体基材を用い、その対向する主面を結ぶように各々の半導体基材に微細孔を形成する工程と、
前記第一配線基板と前記第二配線基板とを重ね合わせた面において、前記第一配線基板と前記第二配線基板とを構成する各々の半導体基材に設けた微細孔の端部同士が連通するように、一方もしくは両方の半導体基材の重ね合わせ面に溝を形成する工程と、
前記重ね合わせた状態において、各々の半導体基材の外面と、前記微細孔と前記溝の各内壁面を絶縁処理して絶縁部を設ける工程と、
前記第一配線基板と前記第二配線基板とを重ね合わせた状態として、前記微細孔の内部に第一導電性物質を、前記溝の内部に第二導電性物質を、連続体をなすように、一緒に充填する工程と、
を少なくとも有することを特徴とする複合基板の製造方法。
The first wiring board and the second wiring board, each having a through-hole formed by arranging a fine hole so as to connect the opposing main surfaces of the base material and filling the fine hole with a conductive material, are superposed on each other. A method of manufacturing a composite substrate for mounting a device electrically connected to the through wiring on a surface other than the overlapping surface of the first wiring substrate and the second wiring substrate ,
As each base material constituting the first wiring board and the second wiring board, both use a semiconductor base material, and a step of forming micropores in each semiconductor base material so as to tie the opposing main surfaces;
On the surface where the first wiring board and the second wiring board are overlapped, the end portions of the fine holes provided in the respective semiconductor substrates constituting the first wiring board and the second wiring board communicate with each other. So as to form a groove in the overlapping surface of one or both semiconductor substrates,
In the superposed state, the outer surface of each semiconductor substrate, and the step of insulating each inner wall surface of the fine hole and the groove to provide an insulating portion;
In a state where the first wiring board and the second wiring board are overlaid, a first conductive material is formed inside the fine hole, a second conductive material is formed inside the groove, and a continuous body is formed. Filling together, and
A method for producing a composite substrate, comprising:
前記配線基板として、前記重ね合わせ面にデバイスを備えているものを用いることを特徴とする請求項7に記載の複合基板の製造方法。 The method for manufacturing a composite substrate according to claim 7, wherein the wiring substrate is provided with a device on the overlapping surface . 前記複合基板として、前記貫通配線が、デバイスを搭載した際にバンプピッチの整合をとる、または、前記基材に内包する機能素子と電気的に接続するものを用いることを特徴とする請求項7または8に記載の複合基板の製造方法。8. The composite substrate, wherein the through wiring uses a bump pitch matching when a device is mounted or is electrically connected to a functional element included in the base material. Or a method for producing a composite substrate according to 8. 前記請求項1からのいずれか1項に記載の複合基板に電子部品を実装してなることを特徴する電子装置。 An electronic device comprising an electronic component mounted on the composite substrate according to any one of claims 1 to 6 . 前記複合基板は、前記電子部品を内包していることを特徴とする請求項10に記載の電子装置。The electronic device according to claim 10, wherein the composite substrate includes the electronic component.
JP2005265640A 2005-09-13 2005-09-13 COMPOSITE BOARD, MANUFACTURING METHOD THEREOF, AND ELECTRONIC DEVICE Expired - Fee Related JP4879536B2 (en)

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