JP4510851B2 - Manufacturing method of wiring board assembly - Google Patents

Manufacturing method of wiring board assembly Download PDF

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JP4510851B2
JP4510851B2 JP2007158120A JP2007158120A JP4510851B2 JP 4510851 B2 JP4510851 B2 JP 4510851B2 JP 2007158120 A JP2007158120 A JP 2007158120A JP 2007158120 A JP2007158120 A JP 2007158120A JP 4510851 B2 JP4510851 B2 JP 4510851B2
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wiring board
dividing
hole
assembly
forming
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JP2007318153A (en
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弘志 中村
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NGK Spark Plug Co Ltd
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Description

本発明は、複数の配線基板となる複数の基板部分を有する配線基板集合体の製造方法に関する。 The present invention relates to the production how the wiring board assembly having a plurality of substrate portions comprising a plurality of wiring boards.

一般にセラミック多層配線基板は、多数個取りによって量産される。係る複数個の配線基板の集合体の状態において、各配線基板の上面に例えば水晶振動子等の素子を搭載し、個別に電気的特性を測定した後に、上記集合体を分割して複数の配線基板を得る場合がある。   In general, ceramic multilayer wiring boards are mass-produced by taking a large number of pieces. In the state of the assembly of a plurality of such wiring boards, an element such as a crystal resonator is mounted on the upper surface of each wiring board and the electrical characteristics are individually measured. A substrate may be obtained.

係るセラミック多層配線基板の集合体70は、例えば図6Aの平面図に示すように、分割溝74によって区画された複数の基板部分72と、分割溝74上に垂直に形成された貫通孔76と、この貫通孔76に一部が接続する素子用の端子78を有する。各基板部分72は、分割溝74に沿い追って分割されて個別の配線基板となる。上記端子78は、基板部分72の上面に搭載される素子等と導通される。
また、図6Bに示すように、上記貫通孔76の内周面全体には、各基板部分72の配線パターンを追ってマザーボードと半田付けして導通するため、中空部を有する円管状の導通部80が形成されている(例えば、特許文献1参照)。
特開平7−78904号公報 (第1〜5頁、図1〜4)
An assembly 70 of such ceramic multilayer wiring boards includes, for example, a plurality of substrate portions 72 partitioned by dividing grooves 74, and through holes 76 formed vertically on the dividing grooves 74, as shown in the plan view of FIG. 6A. , A terminal 78 for an element partially connected to the through hole 76 is provided. Each substrate portion 72 is divided along the dividing groove 74 to become an individual wiring board. The terminal 78 is electrically connected to an element mounted on the upper surface of the substrate portion 72.
Further, as shown in FIG. 6B, the entire inner peripheral surface of the through hole 76 is electrically connected by soldering to the mother board following the wiring pattern of each substrate portion 72, so that a tubular conductive portion 80 having a hollow portion is provided. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 7-78904 (Pages 1-5, FIGS. 1-4)

この場合、図6Cに示すように、分割溝74を挟んで隣接する基板部分72同士は、係る導通部80を介して互いの配線パターン73同士が導通している。
このため、前記集合体70における各基板部分72の上面の素子搭載部に例えば水晶振動子等の素子を固着し、この素子と上記端子78を導通しても、個別の基板部分72の電気的特性を正確に測定できない場合がある。係る集合体70の状態で、各基板部分72の電気的特性を測定できないと、検査効率を低下させるということにもなる。
In this case, as shown in FIG. 6C, the wiring patterns 73 are electrically connected to each other between the substrate portions 72 adjacent to each other with the dividing groove 74 interposed therebetween.
For this reason, even if an element such as a crystal resonator is fixed to the element mounting portion on the upper surface of each substrate portion 72 in the aggregate 70 and this element is electrically connected to the terminal 78, the electrical properties of the individual substrate portions 72 are not affected. In some cases, characteristics cannot be measured accurately. If the electrical characteristics of each substrate portion 72 cannot be measured in the state of the aggregate 70, the inspection efficiency is also lowered.

また、前記貫通孔76内に分割後に外部端子となる導通部80を得るため、素子用の端子78と共に、Ni及びAuの無電解メッキを施すに先立ち、それらの下地メタライズに対しPd触媒核等を付着させる活性化処理を施す。この際、断面V形をなす分割溝74の底部にもPd触媒核が付着するため、分割溝74の底部に沿ってNi及びAuメッキ層が線状に形成される。
この結果、図6Dに示すように、分割溝74に沿って各基板部分72毎に分割すると、その側面82における隣接する半円形に凹んだ外部端子84同士が線状のNi及びAuメッキ層86を介して短絡し、本来の回路形成を阻害する不具合を招く場合もある。
In addition, in order to obtain a conductive portion 80 that becomes an external terminal after being divided in the through-hole 76, the Pd catalyst nucleus or the like is applied to the base metallization before the electroless plating of Ni and Au together with the element terminal 78. An activation treatment is applied to adhere the. At this time, Pd catalyst nuclei also adhere to the bottom of the dividing groove 74 having a V-shaped cross section, so that Ni and Au plating layers are formed linearly along the bottom of the dividing groove 74.
As a result, as shown in FIG. 6D, when each substrate portion 72 is divided along the dividing groove 74, the adjacent semi-circular external terminals 84 on the side surfaces 82 are linear Ni and Au plating layers 86. In some cases, a short circuit may occur, leading to problems that hinder the original circuit formation.

本発明は、以上の従来の技術における問題点を解決し、個別の配線基板となる基板部分の電気的特性の測定を配線基板の集合体の状態において可能とした配線基板集合体の製造方法を提供することを目的とする。 The present invention, more than to solve the problems of the prior art, allows the the prepared how the wiring board assembly in the state of aggregation of the wiring substrate to measure the electrical properties of the substrate portion to be a separate circuit board The purpose is to provide.

課題を解決するための手段および発明の効果Means for Solving the Problems and Effects of the Invention

本発明は、上記課題を解決するため、配線基板集合体の貫通孔内に形成される複数の導体層を隣接する基板部分毎に分離して形成し、且つ分割後の配線基板の側面における導体層同士の短絡を断つことに着想して成されたものである In order to solve the above-mentioned problems, the present invention forms a plurality of conductor layers formed in the through holes of the wiring board assembly separately for each adjacent board portion, and conductors on the side surfaces of the divided wiring board The idea is to break the short circuit between layers .

即ち、本発明による配線基板集合体の製造方法(請求項1)は、配線基板集合体となる複数のグリーンシートにおいて、複数の基板部分を区分する分割溝が追って形成される分割予定線に沿って、該分割予定線と長軸が平行な略長円形または略楕円形の貫通孔を形成する工程と、上記複数のグリーンシートにおける上記貫通孔毎の内周面で且つ上記分割予定線から離れて対向する複数の基板部分毎の位置に複数の下地メタライズを形成する工程と、上記複数のグリーンシートを上記貫通孔が連通し且つ上記下地メタライズが接続するように積層して積層体を形成する工程と、かかる積層体における上記分割予定線に沿って分割溝を形成する工程と、前記積層体のうち、最上層となるグリーンシートの表面に一部が下地メタライズに接続され且つ上記分割溝に沿った長さが上記貫通孔の長軸よりも短い端子を形成する工程と、上記積層体を焼成する工程と、かかる焼成により得られたセラミックの本体の上記下地メタライズが焼成された下地層にメッキを施して導体層を形成する工程と、を含む、ことを特徴とする That is, the method for manufacturing a wiring board assembly according to the present invention (Claim 1) is based on a predetermined dividing line formed by dividing the plurality of substrate portions in the plurality of green sheets to be the wiring board assembly. Forming a substantially oval or substantially elliptical through hole whose major axis is parallel to the division line, and an inner peripheral surface of each of the through holes in the plurality of green sheets and away from the division line. Forming a plurality of base metallizations at positions corresponding to a plurality of substrate portions facing each other, and laminating the plurality of green sheets so that the through-holes communicate with each other and the base metallizations connect to each other. A step of forming a dividing groove along the dividing line in the laminated body, a part of the laminated body being connected to the base metallization on the surface of the uppermost green sheet; The step of forming a terminal whose length along the dividing groove is shorter than the long axis of the through hole, the step of firing the laminated body, and the base metallization of the ceramic body obtained by the firing are fired. And a step of plating the underlayer to form a conductor layer .

尚、前記基板部分とは、分割後に個別の配線基板となる集合体内の部分を指す The substrate portion refers to a portion in the assembly that becomes an individual wiring substrate after division .

前記配線基板集合体の製造方法によれば、複数の基板部分について上記集合体の状態で、それぞれの電気的特性を測定できる配線基板集合体を確実に提供することができる According to the method for manufacturing a wiring board assembly, it is possible to reliably provide a wiring board assembly capable of measuring the electrical characteristics of a plurality of substrate portions in the state of the assembly .

前記のような配線基板集合体の製造方法による場合、前記配線基板集合体を分割して形成した配線基板であって、セラミックからなる本体の側面に形成され、当該本体の表面から裏面に連なる複数の凹部と、かかる凹部内で且つ平面視にて当該凹部の略中央部に形成された導体層、上記本体の表面に形成され、上記導体層と接続する端子と、を備え、かかる端子の上記側面に沿った長さは、上記凹部の長手方向の長さよりも短い、配線基板が得られる In the case of the method for manufacturing a wiring board assembly as described above, a wiring board formed by dividing the wiring board assembly, which is formed on the side surface of the main body made of ceramic, and is connected to the back surface from the front surface of the main body. A recess formed in the recess and in a substantially central portion of the recess in plan view, and a terminal formed on the surface of the main body and connected to the conductor layer. A wiring board is obtained in which the length along the side surface is shorter than the length of the concave portion in the longitudinal direction .

前記のような配線基板では、その側面に形成される複数の導体層同士およびこれら毎に接続された端子同士が互いに短絡しない配線基板となり得る。更に、配線基板の表面に搭載した素子等と配線基板の配線パターンとを導通することができる。しかも、凹部内の中央部に導体層を形成したので、その基板をマザーボード上に固着する半田のメニスカスの確認も容易となり得る。
尚、上記側面には2つの側面が隣接するコーナ部も含まれる。
また、上記凹部を平面視にて略半円形、略半楕円形、略半長円形、またはこれらの大小を組み合せた形状を呈するものとすることにより、導体層を形成するためのインクが滲んで広がらないため、短絡することなく各凹部内の中央部に導体層を容易に形成し得る。この場合、各凹部内に複数の導体層を併設しても良い。
The wiring board as described above, can be a wiring substrate on which a plurality of conductor layers to each other and the terminals are connected to each of these being formed on its side surface is not shorted together. Furthermore, the elements mounted on the surface of the wiring board can be electrically connected to the wiring pattern of the wiring board. In addition, since the conductor layer is formed at the central portion in the recess, it is possible to easily confirm the meniscus of the solder that fixes the substrate on the mother board.
The side surface includes a corner portion where two side surfaces are adjacent to each other.
Further, when the concave portion has a substantially semicircular shape, a substantially semi-elliptical shape, a substantially semi-elliptical shape, or a combination of these sizes in plan view, the ink for forming the conductor layer is blurred. Since it does not spread, a conductor layer can be easily formed in the central part in each recess without short-circuiting. In this case, a plurality of conductor layers may be provided in each recess.

以下において本発明を実施するための最良の形態を図面と共に説明する。
図1A〜図1Bは、本発明により得られる1形態の配線基板集合体1に関する。
図1Aは、この集合体1の平面図を示し、アルミナ等のセラミックからなる板状の本体2内に分割溝4によって上下左右に4つに区分された基板部分6を同一平面上に有する。図示で水平方向の分割溝4上に沿って長円形の貫通孔5が複数個穿設され、各貫通孔5の中央部の上縁に各基板部分6の上面7に形成された素子用の端子8の一部が接続されている。尚、各基板部分6には図示しない複数の配線パターンが形成されている。
図1Bに示すように、各貫通孔5内の一対の長手面における平面視で中央部には略垂直に導体層10が形成され、且つその上端で上記端子8の一部と導通している。また、導体層10は各基板部分6内の配線パターンの何れかとも導通している。尚、断面V形の分割溝4は本体2の上下両面の同じ位置に形成されているが、少なくとも一方の面にのみ形成しても良い。
The best mode for carrying out the present invention will be described below with reference to the drawings.
1A to 1B relate to one form of wiring board assembly 1 obtained by the present invention.
FIG. 1A shows a plan view of the assembly 1, and a plate-like main body 2 made of ceramic such as alumina has substrate portions 6 divided into four parts vertically and horizontally by dividing grooves 4 on the same plane. In the drawing, a plurality of oval through holes 5 are formed along the horizontal dividing grooves 4, and the element is formed on the upper surface 7 of each substrate portion 6 at the upper edge of the central portion of each through hole 5. A part of the terminal 8 is connected. Each substrate portion 6 is formed with a plurality of wiring patterns (not shown).
As shown in FIG. 1B, a conductor layer 10 is formed substantially vertically in the center portion in a plan view of a pair of longitudinal surfaces in each through hole 5 and is electrically connected to a part of the terminal 8 at the upper end thereof. . Further, the conductor layer 10 is electrically connected to any of the wiring patterns in each substrate portion 6. The dividing groove 4 having a V-shaped cross section is formed at the same position on both the upper and lower surfaces of the main body 2, but may be formed only on at least one surface.

係る配線基板集合体1によれば、基板部分6の各導体層10は貫通孔5内の左右両側部分5aで分割溝4に沿って隣接する導体層10と絶縁されると共に、貫通孔5を挟んで隣接する基板部分6の対向する導体層10とも絶縁されている。
従って、係る集合体1の状態において、各基板部分6の上面7の中央に図示しない素子を搭載し、これと上記素子用の端子8を半田付けして導通すると、各基板部分6の配線パターンとも導通でき、上記素子を含めた各基板部分6の電気的特性を測定することが可能となる。このため、配線基板毎に分割する前に検査が集合体1上で可能となるので、検査工程の効率を高めることもできる。
しかも、各分割溝4に沿って本体2を分割して得られる各配線基板の側面における導体層10同士間の絶縁性も確保される。
According to the wiring board assembly 1, each conductor layer 10 of the substrate portion 6 is insulated from the adjacent conductor layer 10 along the dividing groove 4 by the left and right side portions 5 a in the through hole 5, and the through hole 5 The opposing conductor layers 10 of the substrate portions 6 adjacent to each other are also insulated.
Accordingly, in the state of the assembly 1, an element (not shown) is mounted at the center of the upper surface 7 of each substrate portion 6, and when this is soldered to the element terminal 8, the wiring pattern of each substrate portion 6 is obtained. The electrical characteristics of each substrate portion 6 including the above elements can be measured. For this reason, since the inspection can be performed on the assembly 1 before dividing each wiring board, the efficiency of the inspection process can be increased.
In addition, insulation between the conductor layers 10 on the side surface of each wiring board obtained by dividing the main body 2 along each dividing groove 4 is also ensured.

尚、貫通孔5の形状は上記長円形に限らず、例えば図1Cのように横長の上記長円形の上下辺における中央部を更に略半長円形に凹ませた貫通孔5b、図1Dのように横長の長円形の上下辺における中央部を更に略半円形に凹ませた貫通孔5c、又は図1Eのように横長の楕円形の上下辺における中央部を更に略半円形に凹ませた貫通孔5dとすることもできる。
これらのように、貫通孔5の中央部を略半長円形、又は略半円形に更に凹ませると、後述するように貫通孔5の中央部に導体層10となるメタライズをマスクを介して部分的に形成する際、注入するメタライズインクが濡れ広がるのを防止でき、該インクを一層容易に貫通孔5の中央部に塗布することができる。
また、図1Cの貫通孔5bの図示で下辺に示すように、複数の導体層10を互いに絶縁して併設することもできる。
The shape of the through hole 5 is not limited to the oval shape. For example, as shown in FIG. 1C, the center portion of the upper and lower sides of the horizontally long oval shape is further recessed into a substantially semi-oval shape, as shown in FIG. 1D. A through hole 5c in which the central part of the upper and lower sides of a horizontally long oval is further recessed in a substantially semicircular shape, or a through hole in which the center part of the horizontally long oval upper and lower sides is further recessed in a substantially semicircular shape as shown in FIG. It can also be the hole 5d.
As described above, when the central portion of the through-hole 5 is further recessed into a substantially semi-oval shape or a substantially semi-circular shape, the metallization that becomes the conductor layer 10 is partly provided through the mask in the central portion of the through-hole 5 as will be described later. Therefore, the metallized ink to be injected can be prevented from getting wet and spread, and the ink can be applied to the central portion of the through hole 5 more easily.
Further, as shown in the lower side in the illustration of the through hole 5b in FIG. 1C, the plurality of conductor layers 10 can be insulated and provided side by side.

図2Aおよび図2Bは、本発明により得られる異なる形態の配線基板集合体11に関する。
図2Aは、この集合体11の平面図を示し、前記同様のセラミックからなる板状の本体12内に分割溝14によって4つに区分された基板部分16を同一平面上に有する。図示で水平方向の分割溝14に沿って長円形の貫通孔15が等間隔に複数個穿設され、各貫通孔15の上縁には各基板部分16の上面17に形成された素子用の端子18の一部が繋がっている。また、各貫通孔15,15間には分割溝14を遮る丸い通し孔19が貫通されている。尚、各基板部分16も図示しない複数の配線パターンを有している。
2A and 2B relate to different forms of wiring board assemblies 11 obtained by the present invention .
FIG. 2A shows a plan view of the assembly 11, and the substrate portion 16 divided into four by the dividing grooves 14 is provided on the same plane in the plate-like main body 12 made of the same ceramic as described above. In the figure, a plurality of oval through holes 15 are formed at equal intervals along the horizontal dividing grooves 14, and the upper edge of each through hole 15 is for an element formed on the upper surface 17 of each substrate portion 16. A part of the terminal 18 is connected. A round through hole 19 that blocks the dividing groove 14 is passed between the through holes 15 and 15. Each substrate portion 16 also has a plurality of wiring patterns (not shown).

図2Bに示すように、各貫通孔15内の一対の長手面における平面視で中央部には垂直に導体層20が形成され、且つその上端で上記端子18の一部と導通している。尚、導体層20は各基板部分56の配線パターンとも導通している。
係る配線基板集合体11によれば、各基板部分16の導体層20は貫通孔15内の左右両側部分15a及び貫通孔15間の各通し孔19によって互いに絶縁され、且つ各貫通孔15を挟んで隣接する基板部分16の対向する導体層20とも互いに絶縁されている。
As shown in FIG. 2B, a conductor layer 20 is vertically formed in the center portion in a plan view of a pair of long surfaces in each through hole 15 and is electrically connected to a part of the terminal 18 at the upper end thereof. The conductor layer 20 is also electrically connected to the wiring pattern of each substrate portion 56.
According to the wiring board assembly 11, the conductor layer 20 of each board portion 16 is insulated from each other by the left and right side portions 15 a in the through hole 15 and the through holes 19 between the through holes 15, and sandwiches the through holes 15. The opposing conductor layers 20 of the adjacent substrate portions 16 are also insulated from each other.

従って、係る集合体11の状態のままで、各基板部分16の上面17中央に搭載した素子と該素子用の端子18を半田付けして導通すると、各基板部分16の配線パターンとも導通でき、上記素子を含めた各基板部分16の電気的特性を測定することができる。このため、配線基板毎に分割する前の集合体11上で検査が確実に行えるので、検査工程の効率を高めることもできる。
しかも、各分割溝14に沿って本体12を分割して得られる配線基板の側面における導体層20同士間の絶縁性も確保される。
Therefore, when the element mounted on the center of the upper surface 17 of each substrate portion 16 and the terminal 18 for the element are soldered and conducted in the state of the aggregate 11, the wiring pattern of each substrate portion 16 can be conducted. The electrical characteristics of each substrate portion 16 including the element can be measured. For this reason, since the inspection can be reliably performed on the assembly 11 before being divided for each wiring board, the efficiency of the inspection process can be increased.
In addition, insulation between the conductor layers 20 on the side surface of the wiring board obtained by dividing the main body 12 along each dividing groove 14 is also ensured.

次に、本発明による前記配線基板集合体11の製造方法について、図3A〜図3Fにより説明する。
図3A及び図3aは、主にアルミナからなり、前記本体12を形成するためのグリーンシート21の断面と部分平面図を示す。
次に、図3B及び図3bに示すように、各グリーンシート21の前記分割溝14が追って形成される分割予定線(仮想線)に沿って、複数の長円形を呈する貫通孔15と丸い通し孔19とがプレスによって交互に打ち抜かれる。
更に、各グリーンシート21の上面に、タングステン(W)やモリブデン(Mo)等の高融点金属からなる導電ペーストがスクリーン印刷により所定のパターンに倣って塗布される。
Next, a method for manufacturing the wiring board assembly 11 according to the present invention will be described with reference to FIGS. 3A to 3F.
3A and 3A are a cross-sectional view and a partial plan view of a green sheet 21 mainly made of alumina and used to form the main body 12.
Next, as shown in FIGS. 3B and 3B, a plurality of oval-shaped through holes 15 and round through holes are formed along the planned dividing lines (virtual lines) formed along the dividing grooves 14 of the green sheets 21. The holes 19 are alternately punched by a press.
Furthermore, a conductive paste made of a refractory metal such as tungsten (W) or molybdenum (Mo) is applied to the upper surface of each green sheet 21 by screen printing following a predetermined pattern.

また、図3C及び図3Dに示すように、各シート21の各貫通孔15の開口部には図中の破線で示す吸引孔22を有するマスク23が接触され、W又はMo等からなるメタライズインクを注入する。係るインクは反対側の開口部からの負圧によって吸引され、図示のように貫通孔15内の長手面の中央部に下地メタライズ24を形成する。尚、該メタライズ24は、シート21の上面にも形成される。
次いで、図3Eに示すように、各グリーンシート21を上記貫通孔15と通し孔19が互いに連通するように積層し積層体26とする。この際、貫通孔15内の各下地メタライズ24同士も上下に接続される。
Further, as shown in FIGS. 3C and 3D, a mask 23 having a suction hole 22 indicated by a broken line in the drawing is brought into contact with the opening of each through hole 15 of each sheet 21, and metallized ink made of W or Mo or the like. Inject. The ink is sucked by the negative pressure from the opening on the opposite side, and forms a base metallization 24 at the center of the longitudinal surface in the through hole 15 as shown. The metallization 24 is also formed on the upper surface of the sheet 21.
Next, as shown in FIG. 3E, the green sheets 21 are laminated so that the through holes 15 and the through holes 19 communicate with each other to form a laminated body 26. At this time, the base metallizations 24 in the through holes 15 are also connected to each other in the vertical direction.

更に、図3F及び図3fに示すように、上記積層体26における上下端のグリーンシート21に、前記分割予定線に沿って断面V形の分割溝14を形成する。尚、分割溝14は、予め個別のグリーンシート21に形成しておいても良い。
係るシート21の積層体26を上下方向に加圧しつつ、約1500℃に所定時間に渉り加熱・保持して焼成し、前記図2に示すセラミックの本体12とする。同時に、前記導電ペーストは配線パターンや素子用の端子18となる。また、下地メタライズ24は下地層となる。
次いで、各貫通孔15内の下地層に対し、マスクを介して活性化処理した上、メッキ用触媒核の付着を行う。上記活性化処理は界面活性剤を付着させ、メッキ用触媒核の付着を確保するために施す。上記メッキ用触媒核はPd(パラジウム)であり、所謂キャタリストとアクセレーティング処理により付着される。
Further, as shown in FIGS. 3F and 3f, the dividing grooves 14 having a V-shaped cross section are formed in the green sheets 21 at the upper and lower ends of the laminate 26 along the planned dividing line. The dividing grooves 14 may be formed in advance on the individual green sheets 21.
The laminated body 26 of the sheet 21 is heated and held at about 1500 ° C. for a predetermined time while being pressed in the vertical direction, and fired to obtain the ceramic body 12 shown in FIG. At the same time, the conductive paste becomes a wiring pattern or an element terminal 18. The base metallization 24 becomes a base layer.
Next, the base layer in each through-hole 15 is activated through a mask, and then a catalyst core for plating is attached. The activation treatment is performed to adhere a surfactant and ensure adhesion of the catalyst core for plating. The plating catalyst nucleus is Pd (palladium), and is deposited by a so-called catalyst and an acceleration treatment.

この際、上記Pd触媒核は、狭い分割溝14内(特に底の部分)に残留しても通し孔19内には残留しない。また、Pd触媒核は貫通孔15内においても処理液と共に流下する。最後に各下地層に対し無電解Ni及びAuメッキを行う。
このメッキは上記Pd触媒核が付着する部分にのみ形成されるので、各下地層及び分割溝14内にメッキが析出しても、左右両側部分15aや通し孔19には上記Ni及びAuメッキが析出しない。この結果、導体層20が相互に絶縁された配線基板集合体11を得ることができる。
At this time, the Pd catalyst nucleus does not remain in the through hole 19 even if it remains in the narrow dividing groove 14 (particularly the bottom portion). Further, the Pd catalyst nucleus also flows down with the treatment liquid in the through hole 15. Finally, electroless Ni and Au plating is performed on each underlayer.
Since this plating is formed only on the portion where the Pd catalyst nucleus adheres, even if the plating is deposited in each of the underlayers and the division grooves 14, the left and right side portions 15a and the through holes 19 are not covered with the Ni and Au plating. It does not precipitate. As a result, the wiring board assembly 11 in which the conductor layers 20 are insulated from each other can be obtained.

尚、係る集合体11を各分割溝14に沿って破断し分割することにより、複数の配線基板が得られる。
また、上記各グリーンシート21に貫通孔15を打ち抜き且つ上記通し孔19の形成を省略して、同様の各工程を施すことにより、図1A及び図1Bの配線基板集合体1を製造でき、且つこの集合体1を分割することによっても、複数の配線基板が得られる。
A plurality of wiring boards can be obtained by breaking and dividing the aggregate 11 along the dividing grooves 14.
Further, by punching the through holes 15 in the respective green sheets 21 and omitting the formation of the through holes 19, and performing the same processes, the wiring board assembly 1 of FIGS. 1A and 1B can be manufactured, and A plurality of wiring boards can also be obtained by dividing the assembly 1.

次に、前記集合体1を分割して得られた配線基板31について説明する。
図4Aは、本発明の配線基板31の平面図を示す。この基板31はアルミナ等のセラミックからなる板状の本体32と、この本体32の上面(表面)33に形成した複数の素子用の端子34を有する。
図4Bにも示すように、上記本体32の側面36には本体32に対し半長円形に凹んだ複数の凹部38が設けられ、この凹部38の平面視で中央部に端子となる導体層40が略垂直に形成されている。この導体層40はその上端で上記素子用の端子34と導通すると共に、図4Cに示すように、本体12に内蔵される複数の配線パターン35,35とも導通している。
Next, the wiring board 31 obtained by dividing the assembly 1 will be described.
FIG. 4A shows a plan view of the wiring board 31 of the present invention. The substrate 31 has a plate-like main body 32 made of ceramic such as alumina, and a plurality of element terminals 34 formed on the upper surface (surface) 33 of the main body 32.
As shown in FIG. 4B, the side surface 36 of the main body 32 is provided with a plurality of concave portions 38 that are recessed in a semi-oval shape with respect to the main body 32, and the conductor layer 40 that serves as a terminal at the center in the plan view of the concave portion 38. Are formed substantially vertically. The conductor layer 40 is electrically connected to the element terminal 34 at the upper end thereof, and is also electrically connected to a plurality of wiring patterns 35 and 35 built in the main body 12 as shown in FIG. 4C.

上記本体32は、例えば厚さ約0.5mmで、各凹部38の側面36に沿う長さは約1mm、その凹みは約0.3mm、各導体層40の幅は約0.3mmである。従って、導体層40の左右には凹部38の両側部分39,39が幅約0.3mmずつ残っている。この凹部38内に部分的に導体層40を形成するには、凹部38自体を側面36に沿って長めにすると共に、前述したように導体層40となる下地メタライズをマスクを介して形成することにより成される。
この配線基板31によれば、凹部38の中央部に導体層40が形成され、その両側部分39,39によって同じ側面36にて隣接する凹部38内の導体層40と確実に絶縁されるので、仮に製造工程で前記図6Dで示した線状のメッキ層86が生じても、導体層40同士間の不用意な短絡を確実に防げ、その誤作動を予防できる。尚、図4Dは、凹部38内に導体層40を併設した状態を示す。
The main body 32 has a thickness of about 0.5 mm, for example, the length along the side surface 36 of each recess 38 is about 1 mm, the recess is about 0.3 mm, and the width of each conductor layer 40 is about 0.3 mm. Therefore, the left and right sides of the conductor layer 40 have both side portions 39, 39 of the recess 38 each having a width of about 0.3 mm. In order to partially form the conductor layer 40 in the recess 38, the recess 38 itself is elongated along the side surface 36, and the base metallization that becomes the conductor layer 40 is formed through the mask as described above. It is made by.
According to this wiring board 31, the conductor layer 40 is formed at the center of the recess 38, and is reliably insulated from the conductor layer 40 in the recess 38 adjacent on the same side surface 36 by both side portions 39, 39. Even if the linear plating layer 86 shown in FIG. 6D occurs in the manufacturing process, an inadvertent short circuit between the conductor layers 40 can be surely prevented, and the malfunction can be prevented. 4D shows a state in which the conductor layer 40 is provided in the recess 38. FIG.

また、前記集合体11を分割して得られた配線基板51について説明する。
図5Aは、前記集合体11を分割して得た配線基板41の平面図を示す。この基板41は前記と同様なセラミックからなる板状の本体42と、該本体42の上面(表面)43に形成した複数の素子用の端子44を有する。
図5Bにも示すように、上記本体42の側面46には本体42に対し半長円形に凹んだ複数の凹部48が等間隔に設けられ、この凹部48の平面視で中央部に端子となる導体層50が略垂直に形成されている。この導体層50はその上端で上記素子用の端子44と導通すると共に、本体42の図示しない配線パターンの何れかと導通している。しかも、各導体層50同士間の側面46には半円形の垂直な溝部49が上面43から下面(裏面)に連なって設けられている。
The wiring board 51 obtained by dividing the assembly 11 will be described.
FIG. 5A shows a plan view of a wiring board 41 obtained by dividing the assembly 11. The substrate 41 has a plate-like main body 42 made of the same ceramic as described above, and a plurality of element terminals 44 formed on the upper surface (surface) 43 of the main body 42.
As shown in FIG. 5B, a plurality of concave portions 48 that are recessed in a semi-oval shape with respect to the main body 42 are provided at equal intervals on the side surface 46 of the main body 42. The conductor layer 50 is formed substantially vertically. The conductor layer 50 is electrically connected to the element terminal 44 at the upper end thereof, and is electrically connected to one of the wiring patterns (not shown) of the main body 42. In addition, a semicircular vertical groove 49 is provided on the side surface 46 between the conductor layers 50 so as to continue from the upper surface 43 to the lower surface (back surface).

上記導体層50は、前述したように一対の凹部48,48を形成する前記長円形の貫通孔15内の中央部に前述したようにメタライズインクを負圧にて吸引することで形成され、溝部49もプレスによる打ち抜きによって形成される。
係る配線基板41によれば、導体層50が凹部48の中央部に形成され、且つ凹部48同士間の側面46に溝部49が形成されているので、仮に前記図6(D)の線状のメッキ層86が生じても凹部48の左右両側部分48aと溝部49によって遮断される。従って、導体層50同士間の不用意な短絡を確実に防げ、その誤作動を予防できる。
尚、配線基板41の四隅における円弧49′は基板41が集合体11の状態において隣接する基板部分16とに跨って打抜かれた前記通し孔19の跡を示す。
As described above, the conductor layer 50 is formed by sucking the metallized ink with a negative pressure in the central portion of the oval through-hole 15 forming the pair of recesses 48, as described above. 49 is also formed by punching with a press.
According to the wiring board 41, since the conductor layer 50 is formed in the central portion of the recess 48 and the groove portion 49 is formed in the side surface 46 between the recesses 48, the linear shape shown in FIG. Even if the plated layer 86 is formed, it is blocked by the left and right side portions 48 a of the recess 48 and the groove 49. Therefore, an inadvertent short circuit between the conductor layers 50 can be surely prevented, and the malfunction can be prevented.
Note that arcs 49 ′ at the four corners of the wiring board 41 indicate the traces of the through holes 19 that are punched across the board portions 16 adjacent to each other when the board 41 is in the state of the assembly 11.

本発明は、以上に説明した形態に限定されるものではない。
前記配線基板集合体の貫通孔の前記分割溝に沿うサイズを数種類形成して、比較的長く形成した貫通孔内に複数の導体層を並行して形成したり、前記配線基板の凹部も同様にして各凹部内に単数又は複数の導体層を形成することもできる。
配線基板やその集合体を形成するセラミックには、前記アルミナに限らず、窒化アルミニウム、ガラスセラミック、ムライト等を用いることもできる。
The present invention is not limited to the shape condition described above.
Several sizes of the through holes of the wiring board assembly are formed along the dividing grooves, and a plurality of conductor layers are formed in parallel in the relatively long through holes, and the recesses of the wiring board are similarly formed. It is also possible to form one or more conductor layers in each recess.
The ceramic forming the wiring board and the aggregate thereof is not limited to alumina, and aluminum nitride, glass ceramic, mullite, and the like can also be used.

また、導体層、端子、及び配線パターンの材質も前記WやMoに限らず、CuやCo及びこれらをベースとする合金、Mo−Mn、Ag、Ag−Pd、Ag−Pt等を適用することも可能である。   Also, the material of the conductor layer, terminal, and wiring pattern is not limited to W or Mo, but Cu, Co, alloys based on these, Mo-Mn, Ag, Ag-Pd, Ag-Pt, etc. are applied. Is also possible.

更に、前記配線基板集合体は、上記素子等を各基板部分に搭載し、且つ蓋にて密封する等の組立てを前記検査に先立って行うこともできる。
また、前記配線基板には複数の電子部品や素子を搭載するマルチチップモジュール等の表面実装型配線基板も含まれる。更に、前記水晶振動子の他、トランジスタ、ダイオードやEFT等の素子を搭載することもできる。尚、搭載された素子等は、配線基板上において蓋により密封される。
Furthermore, the wiring board assembly can be assembled prior to the inspection, such as mounting the above elements on each board portion and sealing with a lid.
The wiring board also includes a surface mount wiring board such as a multichip module on which a plurality of electronic components and elements are mounted. Further, in addition to the crystal resonator, elements such as a transistor, a diode, and an EFT can be mounted. The mounted elements and the like are sealed with a lid on the wiring board.

本発明により得られる配線基板集合体の一形態を示す平面図 The top view which shows one form of the wiring board aggregate | assembly obtained by this invention 図1A中の一点鎖線で示す部分Bの部分斜視図。The fragmentary perspective view of the part B shown with the dashed-dotted line in FIG. 1A. 上記集合体に設ける貫通孔の異なる形態を示す部分平面図。The partial top view which shows the form from which the through-hole provided in the said assembly differs. 上記集合体に設ける貫通孔の更に異なる形態を示す部分平面図。The partial top view which shows the further different form of the through-hole provided in the said assembly. 上記集合体に設ける貫通孔の更に別なる形態を示す部分平面図。The partial top view which shows another form of the through-hole provided in the said assembly. 本発明により得られる異なる形態の配線基板集合体を示す平面図。 The top view which shows the wiring board aggregate | assembly of a different form obtained by this invention . 図2A中の一点鎖線部分Bの部分斜視図。The partial perspective view of the dashed-dotted line part B in FIG. 2A. 本発明による配線基板集合体の製造方法の一製造工程を示す概略断面図。 The schematic sectional drawing which shows one manufacturing process of the manufacturing method of the wiring board aggregate | assembly by this invention . 図3Aにおける部分平面図。The partial top view in FIG. 3A. 図3Aに続く製造工程を示す概略断面図。FIG. 3B is a schematic cross-sectional view showing the manufacturing process following FIG. 3A. 図3Bにおける部分平面図。The partial top view in FIG. 3B. 図3Bに続く製造工程を示す概略断面図。FIG. 3B is a schematic cross-sectional view showing the manufacturing process following FIG. 3B. 図3Cの製造工程を示す部分平面図および部分斜視図。FIG. 3C is a partial plan view and a partial perspective view showing the manufacturing process of FIG. 3C. 図3Cに続く製造工程を示す概略断面図。FIG. 3C is a schematic cross-sectional view showing the manufacturing process following FIG. 3C. 図3Eに続く製造工程を示す概略断面図。FIG. 3E is a schematic cross-sectional view showing a manufacturing process following FIG. 3E. 図3Fの製造工程を示す部分斜視図。FIG. 3F is a partial perspective view showing the manufacturing process of FIG. 3F. 前記配線基板集合体を分割して得られた配線基板の一形態を示す平面図。 The top view which shows one form of the wiring board obtained by dividing | segmenting the said wiring board aggregate | assembly . 図4A中の一点鎖線で示す部分Bの部分斜視図。FIG. 4B is a partial perspective view of a portion B indicated by a one-dot chain line in FIG. 4A. 図4B中におけるC−C線の矢視に沿った断面図。Sectional drawing along the arrow of CC line in FIG. 4B. 前記配線基板集合体を分割して得られた異なる形態の配線基板を示す部分斜視図。 The fragmentary perspective view which shows the wiring board of a different form obtained by dividing | segmenting the said wiring board aggregate | assembly . 前記配線基板集合体を分割して得られた更に異なる形態の配線基板を示す平面図。 The top view which shows the wiring board of another form obtained by dividing | segmenting the said wiring board aggregate | assembly . 図5A中の一点鎖線部分Bの部分斜視図。The fragmentary perspective view of the dashed-dotted line part B in FIG. 5A. 従来の配線基板集合体を示す平面図。The top view which shows the conventional wiring board aggregate | assembly. 図6A中の一点鎖線で示す部分Bの部分斜視図。The fragmentary perspective view of the part B shown with the dashed-dotted line in FIG. 6A. 図6B中におけるC−C線の矢視に沿った断面を含む部分斜視図。FIG. 6B is a partial perspective view including a cross section taken along line CC in FIG. 6B. 従来の配線基板の側面を含む部分斜視図。The fragmentary perspective view containing the side surface of the conventional wiring board.

1,11………………………配線基板集合体
4,14………………………分割溝
5,5b〜5d,15………貫通孔
6,16………………………基板部分
10,20,30,40,50……導体層
31,41……………………配線基板
33,43……………………上面(表面)
35……………………………配線パターン
36,46……………………側面
38,48……………………凹部
49……………………………溝部
1, 11 ………………………… Wiring board assembly 4, 14 ……………………… Dividing grooves 5, 5 b to 5 d, 15 ………… Through holes 6, 16 ...... ………… Board part 10,20,30,40,50 …… Conductive layer 31, 41 …………………… Wiring board 33, 43 …………………… Top surface (surface)
35 ……………………………… Wiring pattern 36,46 …………………… Side 38,48 …………………… Recess 49 …………………………… Groove

Claims (1)

配線基板集合体となる複数のグリーンシートにおいて、複数の基板部分を区分する分割溝が追って形成される分割予定線に沿って、該分割予定線と長軸が平行な略長円形または略楕円形の貫通孔を形成する工程と、
上記複数のグリーンシートにおける上記貫通孔毎の内周面で且つ上記分割予定線から離れて対向する複数の基板部分毎の位置に、複数の下地メタライズを形成する工程と、
上記複数のグリーンシートを上記貫通孔が連通し且つ上記下地メタライズが接続するように積層して積層体を形成する工程と、
上記積層体における上記分割予定線に沿って分割溝を形成する工程と、
上記積層体のうち、最表層となるグリーンシートの表面に一部が下地メタライズに接続され且つ上記分割溝に沿った長さが上記貫通孔の長軸よりも短い端子を形成する工程と、
上記積層体を焼成する工程と、
上記焼成により得られたセラミックの本体の上記下地メタライズが焼成された下地層にメッキを施して導体層を形成する工程と、を含む
ことを特徴とする配線基板集合体の製造方法
In a plurality of green sheets to be a wiring board assembly, along the planned dividing line formed by dividing the dividing grooves for dividing the plurality of substrate portions, the divided line and the major axis are substantially oval or substantially elliptical in parallel. Forming a through hole of
Forming a plurality of base metallizations at the positions of the inner peripheral surfaces of the through holes in the plurality of green sheets and the plurality of substrate portions facing away from the division line; and
A step of laminating the plurality of green sheets so that the through holes communicate with each other and the base metallization is connected;
Forming a dividing groove along the planned dividing line in the laminate,
A step of forming a terminal partly connected to the base metallization on the surface of the outermost green sheet of the laminate and having a length along the dividing groove shorter than the major axis of the through hole;
Firing the laminate,
Forming a conductor layer by plating the base layer on which the base metallization of the ceramic body obtained by the firing is fired ,
A method of manufacturing a wiring board assembly.
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