JP4785188B2 - Metal package and manufacturing method thereof - Google Patents

Metal package and manufacturing method thereof Download PDF

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JP4785188B2
JP4785188B2 JP2006061982A JP2006061982A JP4785188B2 JP 4785188 B2 JP4785188 B2 JP 4785188B2 JP 2006061982 A JP2006061982 A JP 2006061982A JP 2006061982 A JP2006061982 A JP 2006061982A JP 4785188 B2 JP4785188 B2 JP 4785188B2
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lead member
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JP2007242379A5 (en
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大輔 福島
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エヌイーシー ショット コンポーネンツ株式会社
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Description

本発明は、金属外環に絶縁材の介在によりリード部材を気密封着した金属ベースを使用する金属パッケージおよびその製造方法、特に、リード部材がセラミック表面のメタライジングからなる小型化に好適する金属ベースを使用した金属パッケージおよびその製造方法に関する。   The present invention relates to a metal package using a metal base in which a lead member is hermetically sealed by interposition of an insulating material in a metal outer ring, and a method for manufacturing the same, and in particular, a metal suitable for miniaturization in which the lead member is made of metallizing a ceramic surface. The present invention relates to a metal package using a base and a manufacturing method thereof.

水晶振動子・フィルタ・発振器などの電子部品デバイスは、リードと金属外環を絶縁材にて気密封着した金属ベースに水晶片・圧電デバイス片を組み込み、これを金属キャップで気密封止した金属パッケージ内に収容して構成される。たとえば、特許文献1に示されるように、金属外環にリード端子をほう珪酸高融点ガラスで気密封着した気密端子に水晶振動子などの機能部品を組み込んで金属キャップで気密空間に収容して妨害電磁波の侵入を防ぐ金属パッケージ構造がある。この構造は、金属リ−ドが貫通する絶縁材を円筒状金属外環の内部に封着した金属ベースに、蓋体となるキャップを被せたもので、気密雰囲気の金属ベース内部で金属リ−ドに電子部品素子を装着して収納する。このように、水晶振動子等の電子部品素子を搭載して収容する金属パッケージは、シールド効果が有利な金属ベースに金属リードを絶縁材の介在で気密封着する金属パッケージが主流である。同様に、特許文献2は長円状の金属外環の長手方向の両端近傍にリード端子を絶縁して気密封着した気密端子をベース材に用い、リード端子にサポート部材を溶接し、水晶板をこのサポート部材に固着する水晶振動子の支持構造を開示している。しかし、水晶振動子用気密端子では小型化の要請と表面実装方式の増加から、多数の電子デバイスを金属パッケージに収納するために複数個のリードを必要として量産化対応の問題がある。
特開2001−68194号公報 実開平5−11539号公報
Electronic component devices such as crystal units, filters, and oscillators are made by incorporating crystal pieces and piezoelectric device pieces into a metal base that is hermetically sealed with an insulating material between the lead and metal outer ring, and this is hermetically sealed with a metal cap. Contained in a package. For example, as shown in Patent Document 1, a functional part such as a crystal unit is incorporated in a hermetic terminal in which a lead terminal is hermetically sealed with a borosilicate high melting point glass on a metal outer ring, and is accommodated in an airtight space with a metal cap. There is a metal package structure that prevents intrusion of disturbing electromagnetic waves. This structure is a metal base in which an insulating material through which a metal lead penetrates is sealed inside a cylindrical metal outer ring, and a cap serving as a lid is put on the metal lead inside the metal base in an airtight atmosphere. The electronic component element is mounted on the door and stored. As described above, a metal package in which an electronic component element such as a crystal resonator is mounted and accommodated is mainly a metal package in which a metal lead is hermetically sealed with an insulating material interposed on a metal base having an advantageous shielding effect. Similarly, Patent Document 2 uses a hermetic terminal in which a lead terminal is insulated and hermetically sealed in the vicinity of both ends in the longitudinal direction of an oval metal outer ring as a base material, a support member is welded to the lead terminal, and a quartz plate Discloses a support structure for a crystal unit that is fixed to the support member. However, the hermetic terminal for crystal resonators has a problem of mass production because it requires a plurality of leads to accommodate a large number of electronic devices in a metal package due to a demand for miniaturization and an increase in the surface mounting method.
JP 2001-68194 A Japanese Utility Model Publication No. 5-11539

ところが、上述する従来の金属パッケージでは、貫通する一対のリード端子間に絶縁材を介在させ、絶縁性確保の観点からリード端子間の絶縁距離を大きくする必要が生じ、結果的に外径が大となり金属パッケージの小型薄型化が困難であった。特に、複数個のリード端子を必要とする金属パッケージでは、気密端子の金属ベースに絶縁材を介して気密封着される複数個のリード端子の整列精度に問題を生ずる。たとえば、リード長にばらつきが生じて端子接続面が不揃いになったり、リード相互の直立平行度で一部に傾きが生じて短絡事故となったりするために、ショート防止対策に修正作業を余儀なくされる等の問題が生じていた。また、多数のリード端子を有する金属パッケージの製造工程では電子機器への組立作業における表面実装作業面での多くの課題が残されていた。特に、多数のリード端子を所定位置に正確に整列することが必要な小型薄型化金属パッケージにおいて、量産化に好適で作業を容易にすると共にリード端子間の距離短縮化と精度の向上が要請されている。   However, in the conventional metal package described above, it is necessary to interpose an insulating material between a pair of penetrating lead terminals to increase the insulation distance between the lead terminals from the viewpoint of ensuring insulation, resulting in a large outer diameter. Therefore, it was difficult to reduce the size and thickness of the metal package. In particular, in a metal package that requires a plurality of lead terminals, a problem arises in the alignment accuracy of the plurality of lead terminals that are hermetically sealed to the metal base of the hermetic terminal via an insulating material. For example, variations in lead lengths cause uneven terminal connection surfaces, or some inclinations occur due to the vertical parallelism between the leads, resulting in a short circuit accident. There was a problem such as. Further, many problems remain in the surface mounting work surface in the assembly work to the electronic device in the manufacturing process of the metal package having a large number of lead terminals. In particular, in a small and thin metal package that requires a large number of lead terminals to be accurately aligned at a predetermined position, it is suitable for mass production, facilitates work, and shortens the distance between lead terminals and improves accuracy. ing.

したがって、本発明の目的は上記の欠陥に鑑みて提案されたものであり、リード端子構造についての独創的な工夫により、金属パッケージの小型化を容易にし、かつ複数個のリード端子を必要とする際に極めて有利となる小型化可能な金属ベース部材を用いる金属パッケージを提供することにある。また、量産化に好適で作業の容易化と工数の削減を可能にすると共に、リード端子間の精度を向上する新規かつ改良された小型薄型化に有利な金属パッケージの製造方法の提案を目的とする。   Therefore, the object of the present invention has been proposed in view of the above-mentioned defects, and the original device for the lead terminal structure facilitates the miniaturization of the metal package and requires a plurality of lead terminals. It is an object of the present invention to provide a metal package using a metal base member that can be reduced in size, which is extremely advantageous. In addition, the purpose of the present invention is to propose a new and improved metal package manufacturing method advantageous for miniaturization and thinning, which is suitable for mass production and enables easy work and reduction of man-hours and improves accuracy between lead terminals. To do.

本発明の別の目的は、多数のリード端子を備える気密端子状の金属ベースからなる表面実装用に好適で薄型化可能な金属パッケージにおいて、金属ベースの表面実装側である裏面側に露呈するリード端子の電極接続部が面一に揃えられるように仕上加工して表面実装作業を容易にすると共に、予めリード端子の電極接続部にはめっきを施す新規かつ改良された金属パッケージ用の金属ベース部材とその製造方法を提供することにある。   Another object of the present invention is a metal package that is suitable for surface mounting and that can be made thin, which is made of an airtight terminal-like metal base having a large number of lead terminals, and leads exposed on the back surface side, which is the surface mounting side of the metal base. A new and improved metal base member for a metal package in which the electrode connection part of the terminal is finished so as to be flush with the surface to facilitate surface mounting, and the electrode connection part of the lead terminal is plated in advance. And providing a manufacturing method thereof.

本発明によれば、小判または円形筒状の金属外環およびこの金属外環の内側で絶縁材を介在して貫通するリード部材を有し、金属外環とリード部材を絶縁離間して気密封着した金属ベースを使用した金属パッケージであって、前記リード部材が表面にメタライジング導電パターンを有するセラミックセグメントからなることを特徴とする金属パッケージが提供される。ここで、前記セラミックセグメントはAlが主成分のセラミック材、前記絶縁材が高融点ガラス材であり、特に、前記セラミックセグメントにはAlを90wt%以上含むセラミック材が選ばれ、前記金属外環にはFe、Ni、Coの金属およびこれらの金属を主成分とする合金を含む群から選ばれ、セラミックセグメント、金属外環および絶縁材は加工作業温度における熱膨張率が近似する材料から選択し、かつ前記メタライジング導電パターンは主成分にW、MoまたはMnから選ばれた金属を含み、前記リード部材のターミナルに少なくともNiめっきの層を含む電極部を設けて作製した金属ベース部材を使用することを特徴とする金属パッケージを開示する。したがって、リード部材の導電パターンを微細パターン化して小形でも精度の高いリード配列を可能とするので、金属ベースの小型化ができ小型薄型化金属パッケージを実現する。 According to the present invention, there is an oval or circular cylindrical metal outer ring and a lead member that penetrates through the inside of the metal outer ring with an insulating material interposed therebetween. A metal package using an attached metal base, wherein the lead member is made of a ceramic segment having a metalizing conductive pattern on a surface thereof is provided. Here, the ceramic segment is a ceramic material mainly composed of Al 2 O 3 and the insulating material is a refractory glass material. In particular, a ceramic material containing 90 wt% or more of Al 2 O 3 is selected for the ceramic segment. The metal outer ring is selected from the group including Fe, Ni, Co metals and alloys based on these metals, and the ceramic segment, metal outer ring, and insulating material have approximate thermal expansion coefficients at the processing temperature. The metalizing conductive pattern is selected from materials to be used, and the metalizing conductive pattern includes a metal selected from W, Mo, or Mn as a main component, and is provided by providing an electrode portion including at least a Ni plating layer at a terminal of the lead member A metal package using a base member is disclosed. Therefore, since the conductive pattern of the lead member is made into a fine pattern to enable a highly accurate lead arrangement even with a small size, the metal base can be miniaturized and a small and thin metal package is realized.

本発明の別の観点によれば、Alを主成分とするセラミック材を用いて主幹部と多数の分岐部を有するグリーンシートに成膜する成形工程、前記グリーンシートの分岐部に導電ペースト材を所定のパターンで印刷する工程、前記グリーンシートを焼結してメタライジング導電パターンを有するセラミックセグメントの複数個がフレーム体に連結した櫛状セラミック体を得る焼結工程、この櫛状セラミック体から分岐する複数個のセラミックセグメントを金属外環の内側に貫通配置し絶縁材と共に組み込んで加熱する気密封着工程、冷却後に前記金属外環の内側に絶縁材を介在して貫通する前記セラミックセグメントを前記フレーム体から切断分離してリード部材が前記金属外環に絶縁離間して気密封着した金属ベースを得る仕上工程、前記リード部材の電極部に電子部品素子を装着する実装工程、および前記金属外環の外側に金属キャップを気密封止する封止工程を含む金属パッケージの製造方法が提案される。ここで、セラミック材はAlを90wt%以上含み、導電ペースト材はW、MoまたはMnを主成分に含み、その上にNiめっきが施され、、金属外環および絶縁材は前記セラミックセグメントと熱膨張特性が整合する材料として、セラミックセグメント、金属外環および絶縁材の加工作業温度における熱膨張率の近似する材料を選択する。また、仕上工程にはリード部材のメタライジング導電パターンのNiめっき部分にCuめっきまたはNiめっき、およびその上にAuめっきまたは半田めっきとを施してリード部材の電極部を形成するめっき工程が含まれる。なお、セラミックセグメントおよび絶縁材の出発材料は、上述するAlと高融点ガラスの組合せ以外にも各種セラミック材と低融点ガラスやポリイミド系樹脂等との組合せでもよい。さらに、リード部材は、板状のセラミックセグメントの表面に複数個のリードパターンを形成するほか、断面方形のセラミックセグメントではその両側面や表裏面にリードパターンを形成して互いに絶縁することもできる。さらに、セラミックセグメントは断面形状を円形や楕円形に形成することもでき、取付用電子部品素子の構造にマッチさせるなどの作業面を考慮して都合良い形状にすることもできる。 According to another aspect of the present invention, a molding process for forming a film on a green sheet having a main trunk portion and a number of branch portions using a ceramic material mainly composed of Al 2 O 3 , the branch portions of the green sheet are electrically conductive A step of printing a paste material in a predetermined pattern, a step of sintering the green sheet to obtain a comb-like ceramic body in which a plurality of ceramic segments having a metalizing conductive pattern are connected to a frame body, and this comb-like ceramic A plurality of ceramic segments branching from the body are placed inside the metal outer ring and incorporated with an insulating material to heat and heat-sealing, and after cooling, the ceramic penetrates through the metal outer ring with an insulating material interposed therebetween. Finishing step of cutting and separating the segment from the frame body to obtain a metal base in which the lead member is insulated and separated from the metal outer ring and is hermetically sealed Mounting process, and a manufacturing method of a metal package comprising a sealing step to hermetically seal the metal cap on the outside of the metal outer ring for mounting the electronic component element to the electrode portion of the lead member is proposed. Here, the ceramic material includes 90 wt% or more of Al 2 O 3 , the conductive paste material includes W, Mo, or Mn as a main component, and Ni plating is performed thereon, and the metal outer ring and the insulating material are the ceramics As a material matching the thermal expansion characteristics with the segment, a material having an approximate thermal expansion coefficient at the processing temperature of the ceramic segment, the metal outer ring, and the insulating material is selected. Further, the finishing process includes a plating process of forming an electrode portion of the lead member by performing Cu plating or Ni plating on the Ni plating portion of the metalizing conductive pattern of the lead member and Au plating or solder plating thereon. . The starting material for the ceramic segment and the insulating material may be a combination of various ceramic materials and a low-melting glass, a polyimide resin, or the like other than the above-described combination of Al 2 O 3 and high-melting glass. Further, in addition to forming a plurality of lead patterns on the surface of the plate-shaped ceramic segment, the lead member can also be insulated from each other by forming a lead pattern on both side surfaces and front and back surfaces of the ceramic segment having a square cross section. Further, the ceramic segment can be formed in a circular or elliptical cross-sectional shape, and can be formed in a convenient shape in consideration of a work surface such as matching with the structure of the mounting electronic component element.

従来の金属ベースでは、複数個のリード線を位置決めするために、封着治具に各リードピッチに孔加工をほどこし、その内部にリード線の先端を位置決めし、かつ絶縁材料もリード線の本数分の孔をあける必要があったので小型サイズで複数個のリード線を必要とする金属パッケージには寸法的な限界があった。しかし、本発明の金属ベースでは、複数個のリード端子が単一のセラミックセグメントに形成でき、単一リード部材で複数のリード端子が形成可能である。したがって、封着治具の孔加工も単一でよく、さらに、絶縁材も単一の孔にできるため、小型化への可能性が広がる。たとえば、本発明による金属外環サイズ0.8mmの金属ベースが作製され、従来方法では1.2mmの限界寸法を約30%も小形にすることができるなど電子部品市場の小形化要請に対応することができる。   In the conventional metal base, in order to position a plurality of lead wires, a hole is drilled in each lead pitch in the sealing jig, the tip of the lead wire is positioned inside, and the insulating material is the number of lead wires. Since there was a need to make a minute hole, there was a dimensional limit in a metal package that required a plurality of lead wires in a small size. However, in the metal base of the present invention, a plurality of lead terminals can be formed on a single ceramic segment, and a plurality of lead terminals can be formed with a single lead member. Therefore, a single hole can be formed in the sealing jig, and the insulating material can be formed into a single hole. For example, a metal base having a metal outer ring size of 0.8 mm according to the present invention is manufactured, and the limit size of 1.2 mm can be reduced by about 30% in the conventional method. be able to.

また、組立治具を用いて多数のリード線を金属ベースの多数の貫通孔に挿入し絶縁材で気密封着する従来の製造方法に比べて、本発明の組立では単一のセラミック部材を単一の貫通孔に挿入するだけで組立てられ作業が容易となり、歩留の向上と治具の長寿命化が図られ、気密封着後のリード部材の頂面を平坦状態として平行度が保たれる。さらには、絶縁材の選択によっては金属外環とリード部材の気密封着時の封着温度を低くできることからリード部材のリード端子の不揃いがなく、寸法精度の高い配列状態で小形・薄型化した金属ベース部材が提供できる。したがって、このような金属ベースを用いた金属パッケージでは、その内部に収容する水晶振動子などの電子部品素子の搭載および金属パッケージからなる製品の基板上での表面実装処理を容易にすることができる。   Compared with the conventional manufacturing method in which a large number of lead wires are inserted into a large number of through holes in a metal base using an assembly jig and hermetically sealed with an insulating material, the assembly of the present invention uses a single ceramic member. Assembly is easy just by inserting into one through hole, the work is facilitated, the yield is improved and the life of the jig is extended, and the top surface of the lead member after hermetic sealing is kept flat and the parallelism is maintained. It is. Furthermore, depending on the choice of insulating material, the sealing temperature at the time of hermetic sealing between the metal outer ring and the lead member can be lowered, so there is no irregularity in the lead terminals of the lead member, and the size and thickness have been reduced in an array state with high dimensional accuracy. A metal base member can be provided. Therefore, in such a metal package using a metal base, it is possible to facilitate the mounting of an electronic component element such as a crystal resonator housed therein and a surface mounting process on a substrate of a product made of the metal package. .

本発明の実施形態は、単一または複数の貫通する孔を有する金属外環と、この貫通する孔に高融点ガラスまたは低融点ガラスまたはポリイミド系樹脂等から選択される絶縁材を介在して気密封着したリード部材とを具備した金属ベースを使用し、この金属ベースのリード部材に電子部品素子を装着し、この電子部品素子を収容するように金属キャップを被せて気密封止した金属パッケージである。ここでリード導体であるリード部材は、セラミックセグメントにメタライジングによる導電パターンで形成される。好ましくは、金属外環がFe、Ni、Coおよびこれらの金属を主成分とする合金のいずれかであり、セラミックセグメントがAlを90wt%以上含むセラミック材からなり、絶縁材には高融点ガラス材を使用して熱膨張特性での整合性を得る。セラミックセグメントはグリーンシートの成形体にメタライジング用導電パターンを印刷して焼結して作製される。したがって、多数のリード端子も導電パターンにより所定位置に整列配置させることが容易にできる。そして、グリーンシートを焼結したセラミックセグメントからなるリード部材はその頂面部分および底面部分にターミナル用電極部として所定のめっきを施した接続部をメタライジング導電パターンに設けて金属ベースとする。この金属ベースを用いた金属パッケージは、リード端子が導電パターンとして互いに近接して形成可能なために小形の金属パッケージおよびその製造方法としての実用的効果を発揮する。特に、金属薄板を絞り加工あるいはプレス成形にて形成した、小判形または円形状の金属外環と、グリーンシートにメタライズを印刷して焼結したセラミックセグメントの連結体からブレイク分割あるいは、ダイシングにて分割して作製されるリード部材を所定位置に配置し、所定の空隙に絶縁材を介在させ気密封着する気密封着工程と、金属外環に気密封着した成形されたリード部材の露呈面を表面処理して端子用接続部を形成する仕上工程とからなる製造過程は作業の容易化を図る。
尚、Alを主成分とするセラミック材のグリーンシートは、封着工程前にNiめっきを施されており、気密封着後の仕上工程でのめっき密着性を向上させる。仕上工程にてリードに施される処理は、再度NiめっきあるいはCuめっきなど密着性良好なめっき処理が施され、その上にAgめっきやAuめっきあるいは半田めっき、または半田めっき上にAgめっきやAuめっきなど従来のめっき仕様が採用可能である。また、金属外環については、直接半田めっきを行ったり、CuめっきあるいはNiめっきを下地として処理された上に半田めっき、またはAgめっきやAuめっきなどリード材と同様に、従来のめっき仕様が採用可能である。
In the embodiment of the present invention, a metal outer ring having a single or a plurality of through holes, and an insulating material selected from a high melting point glass, a low melting point glass, a polyimide resin, etc. are interposed in the through holes. This is a metal package that uses a metal base that has a sealed lead member and mounts an electronic component element on the metal base lead member and covers the electronic component element with a metal cap that is hermetically sealed. is there. Here, the lead member which is a lead conductor is formed on the ceramic segment with a conductive pattern by metalizing. Preferably, the metal outer ring is any one of Fe, Ni, Co, and an alloy mainly composed of these metals, the ceramic segment is made of a ceramic material containing 90 wt% or more of Al 2 O 3 , Use a melting point glass material to obtain consistency in thermal expansion characteristics. The ceramic segment is produced by printing a metalizing conductive pattern on a green sheet compact and sintering it. Therefore, a large number of lead terminals can be easily arranged and arranged at predetermined positions by the conductive pattern. And the lead member which consists of the ceramic segment which sintered the green sheet provides the metallizing conductive pattern the connection part which gave predetermined plating as the electrode part for terminals on the top part and bottom part, and makes it a metal base. The metal package using the metal base exhibits a practical effect as a small metal package and a manufacturing method thereof because the lead terminals can be formed close to each other as a conductive pattern. In particular, by dividing or dicing from a connecting body of oval or circular metal outer ring formed by drawing or press forming a thin metal plate and ceramic segments printed with metallized on a green sheet and sintered. An air-sealing process in which a lead member produced by division is disposed at a predetermined position, and an insulating material is interposed in a predetermined gap and hermetically sealed, and an exposed surface of the molded lead member hermetically sealed on the metal outer ring The manufacturing process consisting of a finishing process for surface-treating and forming a terminal connection portion facilitates the work.
Incidentally, the green sheet of a ceramic material which mainly composed of Al 2 O 3 is subjected to Ni plating before the sealing step, to improve the plating adhesion in finish process after hermetically sealed. In the finishing process, the lead is subjected to a plating process with good adhesion, such as Ni plating or Cu plating, and then Ag plating, Au plating, solder plating, or Ag plating or Au on the solder plating. Conventional plating specifications such as plating can be used. For the metal outer ring, the conventional plating specifications are adopted, as with lead materials such as solder plating, Ag plating or Au plating after direct solder plating, Cu plating or Ni plating as the base. Is possible.

別の実施態様は、Alを主成分とするセラミック材のグリーンシートを主幹部と多数の分岐部を有する櫛状グリーンシートに成形加工し、このグリーンシートの分岐部の絶縁離間する部分を残した表面に導電ペースト材をパターンで印刷し、このグリーンシートを焼結して、共通のフレーム体に複数個のメタライジング導電パターンを有するセラミックセグメントが連結した櫛状セラミック焼結体を得る。次いで、この櫛状セラミック焼結体の複数個のセラミックセグメントを金属外環と絶縁材と一緒に気密封着用治具に組立てる。たとえば、コバールの金属薄板を筒状に板金加工した金属外環とほう珪酸ガラス粉末材をタブレット状に加工した絶縁材を用いて、セラミックセグメントが貫通する状態に嵌め込んで組立てる。気密封着用治具に組立てられた後加熱により3者を一体に気密封着し、冷却して複数個の金属ベースが連結状態の金属ベース部材を作製するが、セラミックセグメントをフレーム体の連結から切断分離することで、セラミックセグメントの表面にメタライジング導電パターンを有するリード部材とする。換言すると、金属外環の内側に絶縁材の介在でリード部材が金属外環と絶縁される気密封着した金属ベースが完成される。次に、リード部材の一方端部に電子部品素子をはんだ付けにより装着し、金属外環の外側に金属キャップを気密封止して金属パッケージの製造が完了する。好ましくは、セラミック材はAlを90wt%以上含み、グリーンシートの表面に印刷する導電ペースト材は主成分がW、MoまたはMnの金属粉末にガラス粉末やバインダを混ぜて作られ、焼結によりメタライジング導電パターンとされる。このメタライジング導電パターンの接続端子となる部分にはんだ付け用のNiめっきが施され、金属ベースとされる。特に、金属外環、絶縁材およびリード部材のセラミックセグメントは、お互いに熱膨張率が近接する材料から選ばれ、熱的作業に対する整合性を良好に維持する。上述するように、複数個のリード部材を櫛状セラミック体の利用で連結状態にすることは作業性の能率向上を図り、量産化を容易にする。また、封着工程で櫛形状のリード部材を金属外環の筒体内に絶縁材と共に気密封着用治具に組立配置する組立・気密封着工程後の仕上工程では、リード部材のターミナル電極部にはCuめっきまたはNiめっき、およびその上にAuめっきあるいは半田めっきを施し、これに電子部品素子を実装し、最後に不要となったフレーム体の切断分離して金属ベースとしてもよい。 In another embodiment, a ceramic green sheet mainly composed of Al 2 O 3 is formed into a comb-like green sheet having a main trunk portion and a number of branch portions, and the insulating portions of the branch portions of the green sheet are separated from each other. A conductive paste material is printed in a pattern on the remaining surface, and this green sheet is sintered to obtain a comb-like ceramic sintered body in which ceramic segments having a plurality of metalizing conductive patterns are connected to a common frame body. . Next, a plurality of ceramic segments of the comb-shaped ceramic sintered body are assembled together with a metal outer ring and an insulating material into an airtight wearing jig. For example, a metal outer ring obtained by sheet metal processing of a Kovar metal sheet into a cylindrical shape and an insulating material processed into a tablet shape of a borosilicate glass powder material are fitted and assembled so that the ceramic segment penetrates. After being assembled into a hermetic wearing jig, the three members are integrally hermetically sealed by heating and cooled to produce a metal base member in which a plurality of metal bases are connected. By cutting and separating, a lead member having a metalizing conductive pattern on the surface of the ceramic segment is obtained. In other words, a hermetically sealed metal base is completed in which the lead member is insulated from the metal outer ring by interposing an insulating material inside the metal outer ring. Next, an electronic component element is attached to one end portion of the lead member by soldering, and a metal cap is hermetically sealed outside the metal outer ring to complete the manufacture of the metal package. Preferably, the ceramic material contains 90 wt% or more of Al 2 O 3, and the conductive paste material printed on the surface of the green sheet is made by mixing glass powder or a binder with metal powder whose main component is W, Mo or Mn, and is fired. As a result, a metalizing conductive pattern is obtained. Ni plating for soldering is applied to a portion to be a connection terminal of the metalizing conductive pattern to form a metal base. In particular, the metal outer ring, the insulating material, and the ceramic segment of the lead member are selected from materials having thermal expansion coefficients close to each other, and maintain good matching with thermal work. As described above, connecting a plurality of lead members by using a comb-like ceramic body improves the efficiency of workability and facilitates mass production. In addition, in the finishing process after the assembly / air-sealing process in which the comb-shaped lead member is assembled and arranged in the air-tight wearing jig together with the insulating material in the cylindrical body of the metal outer ring in the sealing process, the terminal electrode part of the lead member May be applied with Cu plating or Ni plating, and Au plating or solder plating thereon, and an electronic component element may be mounted thereon, and the frame body that is no longer needed may be cut and separated to form a metal base.

以下、図面を参照して本発明に係る実施例について詳述する。本発明の金属パッケージは、図1(a)に示すように、貫通する孔を有する円形筒状の金属外環12とこの金属外環の内側の絶縁材14で気密封着されたリード部材16とを具備する金属ベース10を使用して構成される。リード部材16は、図1(b)に示すように、棒状のセラミックセグメント18の表面にメタライズにより一対のリード用導電パターンを形成するが、セラミックセグメント18は90wt%Alを主成分に含むセラミック材からなる。図1(a)に示すように、金属ベース10のリード部材16は、内方側でリード端子の電極部となる一対のリード用導電パターン20、22が設けられ、この電極部に設けて電子部品素子が装着される。一方、リード部材16の金属外環12から外方側に伸び出る部分には導出リード端子としてのリード用導電パターン21、23が形成される。この金属ベース10は、一対の導電パターン20および22に、図2に示されるように水晶片34が装着されて電気的に接続された後、金属キャップ32が金属ベース10の金属外環外面に被せられ、気密封止されて金属パッケージ30になる。注目すべきはリード部材16の構造であり、板状のAlセラミックセグメント18にメタライズにより形成された導電パターンである。導電パターンの印刷技術は、50μmレベルのファインピッチで印刷することが可能であるため、複数リードを必要とする場合でも導電パターンが容易に形成でき、リード用導電パターン間のピッチは封着治具の位置決めに影響されることなく安定した距離が確保できる。それゆえに、小型化に非常に有利となるのみならず、高精度のリードパターンを得ることができる。なお、セラミックセグメントは90wt%のAlを主成分に含むセラミック材のほかに96wt%Alや99wt%Alなどでもよく、好ましくはセラミック材が絶縁材として使用するガラス材や金属外環に使用する金属材と熱膨張特性上の整合性を図ることである。 Embodiments according to the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1A, the metal package of the present invention has a lead member 16 hermetically sealed with a circular cylindrical metal outer ring 12 having a through-hole and an insulating material 14 inside the metal outer ring. It is comprised using the metal base 10 which comprises these. As shown in FIG. 1B, the lead member 16 forms a pair of lead conductive patterns on the surface of the rod-shaped ceramic segment 18 by metallization. The ceramic segment 18 is mainly composed of 90 wt% Al 2 O 3. Made of ceramic material. As shown in FIG. 1 (a), the lead member 16 of the metal base 10 is provided with a pair of lead conductive patterns 20 and 22 serving as electrode portions of lead terminals on the inner side. A component element is mounted. On the other hand, lead conductive patterns 21 and 23 as lead-out lead terminals are formed at portions of the lead member 16 extending outward from the metal outer ring 12. In this metal base 10, after a crystal piece 34 is mounted and electrically connected to the pair of conductive patterns 20 and 22 as shown in FIG. 2, the metal cap 32 is attached to the outer surface of the metal outer ring of the metal base 10. The metal package 30 is covered and hermetically sealed. It should be noted that the structure of the lead member 16 is a conductive pattern formed on the plate-like Al 2 O 3 ceramic segment 18 by metallization. The conductive pattern printing technology enables printing at a fine pitch of 50 μm, so even when multiple leads are required, the conductive pattern can be easily formed, and the pitch between the conductive patterns for leads is the sealing jig. A stable distance can be ensured without being affected by the positioning. Therefore, not only is it very advantageous for downsizing, but also a highly accurate lead pattern can be obtained. The ceramic segment may be 96 wt% Al 2 O 3 or 99 wt% Al 2 O 3 in addition to the ceramic material containing 90 wt% Al 2 O 3 as a main component. Preferably, the ceramic material is glass used as an insulating material. This is to match the thermal expansion characteristics with the metal material used for the material and the metal outer ring.

次に、本発明の金属ベースを用いた金属パッケージの製造方法について簡単に説明する。図2に示すように、水晶振動子用金属パッケージ30は、金属ベース10、金属キャップ32およびキャップ内に収容した水晶片34を具備し、水晶片34を装着した金属ベース10に金属キャップ32を気密封止して構成される。金属ベース10の製造方法は、従来の気密端子の製法と同様に、Fe、Ni、Coおよびこれらの金属を主成分とする合金からなる群から選ばれる金属板、たとえばコバール材の薄板をプレス加工により単一の貫通する孔を有する中空円筒状の金属外環12を作製調達する。この金属外環12の内側中空部に挿入配置するリード部材16と高融点ガラス材タブレットの絶縁体とが調達され気密封着用治具に組み込まれる。リード部材16は本発明の特徴とするセラミック体に導電パターンを形成したものであるが、これはセラミック材から所定形状のグリーンシートを成形加工し、その表面にW、Mo、Mn等の金属粉末を含む導電ペーストを所定のパターンに印刷し、それを焼結して得るセラミック焼結体を利用する。このセラミック焼結体はフレーム体26と複数の分岐体28から成り、分岐体28が切断分離されてセラミックセグメント18となり、リード部材16の構成部材となる。図3(a)に示すように、分岐体28はフレーム体26と連結する状態で複数個櫛形状に作製され、これに金属外環12とガラス絶縁材14とが嵌め込まれ封着により気密封着される。気密封着後、分岐体28が個別に切断分離され、セラミックセグメント18の表面に導電パターンを形成したリード部材16を備えた金属ベース10が得られる。図3(b)に示すように、金属ベース10は分岐体28を所定位置で切断し分離することで複数個の金属ベースが同時に調達できる。すなわち、セラミックセグメント18に所定のリード用導電パターン20〜23を形成した複数個のリード部材16が、互いに連結状態にあるセラミック焼結体を利用して作製される。これは、金属外環12にリード部材16がガラス絶縁材14により気密封着した気密端子を一括して作製するもので、作業の効率化に役立つ。リード部材が90wt%のAlを主成分に含むセラミック材のグリーンシートにより作製する場合、絶縁材14は高融点ガラス材を用い作業温度での熱膨張特性の整合化を図る。ここで、セラミック成形工程では複数個のリード部材が板状セラミックの表面にメタライズ加工して一体成形すること、気密封着工程ではリード部材がリードパターン間の空隙を維持しつつ空隙に絶縁材を挿入配置して金属外環に気密封着すること、および仕上工程ではリード部材の露呈面を表面処理してリード端子となる接続電極部にはんだめっきを施してターミナルを形成することが注目される。金属外環およびターミナルとなる接続電極部は露呈面をめっきして完成させるが、上述の製造方法は単一のリード部材を複数個並べて個別に組立てる場合に比べて、封着工程での組立工数を略リード本数分の1に低減する。なお、組立工程は、プレス成形した金属外環12と一体化したリード部材16が酸洗・酸化などの前処理がなされて、カーボン治具に金属外環、粉末成形したタブレット状絶縁材および一体化したリード部材の順に挿入配置して組み立てが行われる。 Next, a method for manufacturing a metal package using the metal base of the present invention will be briefly described. As shown in FIG. 2, the crystal resonator metal package 30 includes a metal base 10, a metal cap 32, and a crystal piece 34 accommodated in the cap, and the metal cap 32 is attached to the metal base 10 to which the crystal piece 34 is attached. It is hermetically sealed. The metal base 10 is manufactured by pressing a metal plate selected from the group consisting of Fe, Ni, Co, and an alloy containing these metals as a main component, for example, a thin plate of Kovar material, in the same manner as the conventional method of manufacturing an airtight terminal. To produce and procure a hollow cylindrical metal outer ring 12 having a single through-hole. The lead member 16 inserted and disposed in the inner hollow portion of the metal outer ring 12 and the insulator of the high melting point glass material tablet are procured and incorporated in an airtight wearing jig. The lead member 16 is formed by forming a conductive pattern on a ceramic body, which is a feature of the present invention. This is formed by processing a green sheet having a predetermined shape from a ceramic material, and a metal powder such as W, Mo, Mn or the like on the surface thereof. A ceramic sintered body obtained by printing a conductive paste containing a predetermined pattern and sintering it is used. The ceramic sintered body includes a frame body 26 and a plurality of branch bodies 28, and the branch bodies 28 are cut and separated into ceramic segments 18, which are constituent members of the lead member 16. As shown in FIG. 3 (a), a plurality of branch bodies 28 are formed in a comb shape in a state where they are connected to a frame body 26, and a metal outer ring 12 and a glass insulating material 14 are fitted into this, and hermetically sealed by sealing. Worn. After hermetic sealing, the branch bodies 28 are individually cut and separated, and the metal base 10 including the lead member 16 having the conductive pattern formed on the surface of the ceramic segment 18 is obtained. As shown in FIG. 3B, the metal base 10 can be procured simultaneously by cutting and separating the branch body 28 at a predetermined position. That is, a plurality of lead members 16 in which predetermined lead conductive patterns 20 to 23 are formed on the ceramic segment 18 are manufactured using ceramic sintered bodies in a connected state. This is to collectively produce an airtight terminal in which the lead member 16 is hermetically attached to the metal outer ring 12 by the glass insulating material 14, and is useful for improving work efficiency. When the lead member is made of a ceramic green sheet containing 90 wt% Al 2 O 3 as a main component, the insulating material 14 is made of a high-melting glass material and the thermal expansion characteristics at the working temperature are matched. Here, in the ceramic forming process, a plurality of lead members are metallized on the surface of the plate-like ceramic and integrally formed, and in the hermetic sealing process, the lead member maintains an air gap between the lead patterns and an insulating material is provided in the air gap. It is noted that it is inserted and arranged and hermetically sealed to the metal outer ring, and in the finishing process, the exposed surface of the lead member is surface-treated and the connection electrode portion serving as the lead terminal is subjected to solder plating to form a terminal. . The metal outer ring and the connection electrode part that will be the terminal are completed by plating the exposed surface. However, the above manufacturing method requires more man-hours in the sealing process than when a plurality of single lead members are assembled and assembled individually. Is reduced to approximately 1 / the number of leads. In the assembly process, the lead member 16 integrated with the press-molded metal outer ring 12 is subjected to pretreatment such as pickling and oxidation, and the metal outer ring, powder-molded tablet-like insulating material and the integral are formed on the carbon jig. Assembly is performed by inserting and arranging the lead members in order.

換言すると、Alを主成分とするセラミック材を用いて主幹部と多数の分岐部を有するグリーンシートに成膜する成形工程、このグリーンシートの分岐部に導電ペースト材を所定のパターンで印刷する工程、前記グリーンシートを焼結してメタライジング導電パターンを有するセラミックセグメントの複数個がフレーム体に連結した櫛状セラミック体を得る焼結工程、この櫛状セラミック体から分岐する複数個のセラミックセグメントを金属外環の内側に貫通配置し絶縁材と共に気密封着用治具に組み込んで加熱する気密封着工程、冷却後に金属外環の内側に絶縁材を介在して貫通するセラミックセグメントをフレーム体から切断分離し、リード部材が金属外環に絶縁離間して気密封着した金属ベースを得る仕上工程、リード部材の電極部に電子部品素子を装着する実装工程、および金属外環の外側に金属キャップを気密封止する気密封止工程を含む金属パッケージの製造方法を開示する。ここで、焼結工程にはメタライジング導電パターンにNiめっきを施す工程を含め、仕上工程として金属ベースのリード部材の一方端部であるターミナルにCuめっきあるいはNiめっき、およびその上にAuめっきあるいは半田めっきを施すめっき工程を含めることで電子部品素子の装着を容易にする。また、金属外環の外側表面にはCuめっき、およびその上にはんだめっき、またはAgめっきあるいはAgめっき+Auめっきを施して封止を確実にすることができるなど表面実装や気密封止性の高精度化を図ることができる。さらに、金属外環、絶縁材およびリード部材のセラミックセグメントは、お互いに熱膨張率が近接する材料を選んで熱的作業に対する整合性の改善を実施することが好ましい。 In other words, a forming step of forming a film on a green sheet having a main trunk portion and a number of branch portions using a ceramic material mainly composed of Al 2 O 3 , and a conductive paste material in a predetermined pattern on the branch portions of the green sheet. A printing step, a sintering step of obtaining a comb-like ceramic body in which a plurality of ceramic segments having a metalizing conductive pattern are connected to a frame body by sintering the green sheet, and a plurality of branches branched from the comb-like ceramic body A ceramic segment is placed inside the metal outer ring and installed in a hermetic wearing jig together with an insulating material to heat it, and the ceramic segment that penetrates through the inside of the metal outer ring after cooling is framed. Finishing process of obtaining a metal base that is cut and separated from the body, and the lead member is insulated and separated from the metal outer ring and hermetically sealed. It discloses a method of producing the mounting step and the metal outer ring of the metal package comprising feel sealing process to hermetically seal the metal cap outward to mount the electronic component element to the pole. Here, the sintering step includes a step of applying Ni plating to the metalizing conductive pattern, and as a finishing step, Cu plating or Ni plating is applied to a terminal which is one end portion of the metal-based lead member, and Au plating or upper is applied thereto. By including a plating process for performing solder plating, the mounting of electronic component elements is facilitated. Also, the outer surface of the metal outer ring is Cu-plated, and solder plating, or Ag plating or Ag plating + Au plating can be applied on the outer surface to ensure sealing. Accuracy can be improved. Furthermore, it is preferable that the metal outer ring, the insulating material, and the ceramic segments of the lead member are selected from materials having thermal expansion coefficients close to each other to improve the compatibility with the thermal work.

本発明に係る金属パッケージに使用する金属ベースの概要図で、図1(a)は金属ベース全体の斜視図、図1(b)はリード部材の斜視図ある。FIG. 1A is a schematic view of a metal base used in a metal package according to the present invention, FIG. 1A is a perspective view of the entire metal base, and FIG. 1B is a perspective view of a lead member. 図1に示す金属ベースを使用した金属パッケージにおける分解斜視図である。It is a disassembled perspective view in the metal package using the metal base shown in FIG. 同じく金属ベースの製造過程における異なる状態を示す模式図であり、(a)は複数個のリード部材を連結状態で金属外環を組み込んで気密封着した状態を示す斜視図、(b)は複数個のリード部材を連結部から切断分離した状態を示す斜視図である。It is a schematic diagram which similarly shows the different state in the manufacturing process of a metal base, (a) is a perspective view which shows the state which incorporated the metal outer ring in the connection state, and was air-tightly attached, (b) is several. It is a perspective view which shows the state which cut | disconnected and separated the lead member from the connection part.

符号の説明Explanation of symbols

10…金属ベース、 12…金属外環、 14…絶縁材、 16…リード部材、
18…セラミックセグメント、 20、22…内部リード用導電パターン、
21、23…外部リード用導電パターン、 26…フレーム体、 28…分岐体、
30…金属パッケージ、 32…金属キャップ、 34…水晶片。
10 ... Metal base, 12 ... Metal outer ring, 14 ... Insulating material, 16 ... Lead member,
18 ... Ceramic segment 20, 22 ... Conductive pattern for internal leads,
21, 23 ... Conductive pattern for external leads, 26 ... Frame body, 28 ... Branch body,
30 ... metal package, 32 ... metal cap, 34 ... crystal piece.

Claims (4)

Fe、Ni、Coの金属およびこれらの金属を主成分とする合金を含む群から選ばれた貫通孔を有する小判または円形筒状の金属外環と、この貫通孔に配置し高融点ガラス絶縁材の介在により気密封着したリード部材とを具備し、金属外環とリード部材が絶縁離間された金属ベースからなり、前記リード部材はAl を90wt%以上含むセラミック材の表面にメタライジング導電パターンを有するセラミックセグメントからなり、前記メタライジング導電パターンは主成分にW、MoまたはMnを含む金属からなることを特徴とする金属パッケージ。 An oval or circular cylindrical metal outer ring having a through hole selected from the group comprising metals of Fe, Ni, Co and alloys containing these metals as a main component, and a high melting point glass insulating material disposed in the through hole A lead member hermetically sealed by the interposition of a metal base, wherein the metal outer ring and the lead member are insulated and spaced apart from each other, and the lead member is metallized on the surface of the ceramic material containing 90 wt% or more of Al 2 O 3 A metal package comprising a ceramic segment having a conductive pattern, wherein the metalizing conductive pattern is made of a metal containing W, Mo or Mn as a main component . 前記リード部材はターミナルにNiめっきを施し、このNiめっきの上にCuまたはNiめっきおよびその上にAuまたは半田めっきを施して電極部としたことを特徴とする請求項1に記載の金属パッケージ。 2. The metal package according to claim 1, wherein the lead member is formed by subjecting a terminal to Ni plating, Cu or Ni plating on the Ni plating, and Au or solder plating thereon to form an electrode portion . Al を90wt%以上含むセラミック材のグリーンシートを成膜して主幹部と多数の分岐部を有する櫛状に成形する成形工程、W、MoまたはMnを主成分に含む導電ペースト材を前記分岐部に所定のパターンで印刷し、メタライジング導電パターンを有する櫛状セラミック連結体を作製するグリーンシート焼結工程、焼結後のセラミック連結体を分割したセラミックセグメントをリード部材として貫通孔を有する小判または円形筒状の金属外環の所定位置に配置し、空隙に高融点ガラスの絶縁材を介在させ、加熱により3者を一体に気密封着して金属ベースを作製する封着工程、前記リード部材の露呈面を表面処理して端子用接続部を形成する仕上工程、および前記端子用接続部に電子部品素子を実装して前記金属外環の外側に金属キャップを装着する封止工程からなる金属パッケージの製造方法。 A forming process of forming a green sheet of a ceramic material containing 90 wt% or more of Al 2 O 3 and forming the green sheet into a comb shape having a main trunk portion and a large number of branch portions, a conductive paste material containing W, Mo, or Mn as a main component A green sheet sintering process for producing a comb-like ceramic coupling body having a metalizing conductive pattern printed in a predetermined pattern on the branch portion, and through-holes with a ceramic segment obtained by dividing the sintered ceramic coupling body as a lead member A sealing step in which a metal base is prepared by arranging the oval or circular cylindrical metal outer ring in a predetermined position, interposing a high-melting-point glass insulating material in the gap, and heat-sealing the three together. A finishing process in which the exposed surface of the lead member is surface-treated to form a terminal connection portion, and an electronic component element is mounted on the terminal connection portion and gold is placed outside the metal outer ring. Method for producing a metal package comprising a sealing step of attaching the cap. 前記封着工程に先立ち、前記メタライジング導電パターンにNiめっきを施すめっき工程を含み、かつ、前記仕上げ工程に前記Niめっきの上にCuまたはNiめっきおよびその上にAuまたは半田めっきを施して前記リード部材の電極部を形成することを特徴とする請求項3に記載の金属パッケージの製造方法。 Prior to the sealing step, the method includes a plating step of performing Ni plating on the metallizing conductive pattern, and the finishing step is performed by applying Cu or Ni plating on the Ni plating and Au or solder plating thereon. 4. The method of manufacturing a metal package according to claim 3, wherein an electrode portion of the lead member is formed .
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