WO1985005242A1 - Electrically conductive circuit board and a method of producing the same - Google Patents

Electrically conductive circuit board and a method of producing the same Download PDF

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Publication number
WO1985005242A1
WO1985005242A1 PCT/JP1985/000235 JP8500235W WO8505242A1 WO 1985005242 A1 WO1985005242 A1 WO 1985005242A1 JP 8500235 W JP8500235 W JP 8500235W WO 8505242 A1 WO8505242 A1 WO 8505242A1
Authority
WO
WIPO (PCT)
Prior art keywords
resin film
circuit board
metal foil
conductive circuit
layer
Prior art date
Application number
PCT/JP1985/000235
Other languages
French (fr)
Japanese (ja)
Inventor
Atsushi Nishino
Yoshihiro Watanabe
Masaki Ikeda
Masahiro Hiraka
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP59086415A external-priority patent/JPS60229390A/en
Priority claimed from JP59141901A external-priority patent/JPS6120395A/en
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to KR1019850700351A priority Critical patent/KR900006976B1/en
Publication of WO1985005242A1 publication Critical patent/WO1985005242A1/en

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/03Use of materials for the substrate
    • H05K1/05Insulated conductive substrates, e.g. insulated metal substrate
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/03Use of materials for the substrate
    • H05K1/05Insulated conductive substrates, e.g. insulated metal substrate
    • H05K1/053Insulated conductive substrates, e.g. insulated metal substrate the metal substrate being covered by an inorganic insulating layer
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/10Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/20Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by affixing prefabricated conductor pattern
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/03Use of materials for the substrate
    • H05K1/0306Inorganic insulating substrates, e.g. ceramic, glass
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/01Tools for processing; Objects used during processing
    • H05K2203/0147Carriers and holders
    • H05K2203/0156Temporary polymeric carrier or foil, e.g. for processing or transferring

Definitions

  • the present invention relates to a conductive circuit board used for various electronic devices, particularly to a conductive circuit board having a high-precision conductive circuit and withstanding a relatively large current, and a method for manufacturing the same.
  • a typical circuit board that is commercially available is a board that uses X-nor resin and 10-glass epoxy resin-containing epoxy resin. These substrates are disadvantageous in that they have poor heat dissipation.
  • An integrated circuit that incorporates a resistor or power transistor designed to carry a large current generates a large amount of heat. Resistor, transistor
  • Metallic substrates include those coated with epoxy resin and those with a hood layer.
  • the E 0 base plate has high mechanical strength and excellent heat resistance and heat dissipation. Also, because of the electromagnetic shielding effect, it is considered to be effective as a circuit board for high power.
  • a method of forming a circuit using a hood substrate is to form a paste by mixing powders of Au, Ag, Pt, and Cu with a binder, and screen-print the paste. This is a method of forming a circuit by heat treatment. This • Circuits that use high-speed pastes have high electrical resistance and large circuit resistance errors, so circuits that carry large or small currents may cause problems such as circuit heating and malfunction.
  • the hood substrate is used as a high-density, high-precision circuit base.
  • a conductive circuit board according to the present invention includes a substrate having a glassy coating layer on a surface thereof, and a conductive circuit pattern welded to the surface of the glassy layer.
  • a metal plate having a hole covering layer is preferable, but a substrate in which a glassy layer is formed on a ceramic substrate such as aluminum or beryllia may be used. it can.
  • the method of manufacturing the conductive circuit board of the present invention is roughly classified into two methods.
  • One of them is to place a metal foil forming a circuit pattern on the surface of the glass layer of the substrate having the glass layer on the surface, and to soften the glass which forms the glass layer. And fusing the metal foil to the glass layer by heating to a desired temperature.
  • the above heating atmosphere is non-oxidizing when using a metal foil that is easily oxidized such as copper.
  • An active gas atmosphere can be used, but it is convenient to use an atmosphere of one type of gas or a mixture of two or more types selected from the group consisting of nitrogen, argon and hydrogen.
  • Another method of manufacturing a conductive circuit board is to use a glass surface.
  • a conductive circuit pattern supported by a resin film having low heat shrinkage and high flammability is provided on the surface of the glass layer of a substrate having five layers, and the resin film is heated by heating. And a method of softening a glass constituting the glass layer and welding the conductive circuit pattern to the glass layer.
  • one side of a metal foil is coated with the resin film, and then the metal foil is touched to a predetermined circuit pattern. And a method in which one surface of a metal foil is coated with the resin film, and then a metal foil integrated with the resin film is punched into a predetermined circuit pattern.
  • the circuit pattern is not particularly deformed on the substrate, especially in the case of a circuit pattern including a fine portion. O It is advantageous to fix to
  • FIG. 1 is a longitudinal sectional view showing an example of the conductive circuit board of the present invention
  • FIG. 2 is a view showing the manufacturing process thereof
  • FIGS. 3 and 4 are plan views showing examples of the circuit pattern. .
  • FIG. 1 shows a configuration example of a conductive circuit board of the present invention.
  • 1 is a metal substrate 5 and 2 is a vitreous layer covering its surface •.
  • Reference numeral 3 denotes a metal foil welded to the surface of the mouth layer 2 and has a predetermined pattern.
  • FIG. 2 shows a process for obtaining the above-mentioned conductive circuit board.
  • 3a is a metal foil, and 4 is a resin film coated on one side thereof. This tree
  • the oil film 4 has a small deformation due to heat, in particular, a small heat shrinkage, and is highly flammable.
  • a solution obtained by dissolving the resin in an appropriate solvent is applied to the surface of the metal foil 3a, or is adhered to a uniform thickness by screen printing.
  • the metal foil. 3 having a conductive circuit having a predetermined pattern by to edge quenching the metal foil 3 a.
  • the metal foil 3 integrated with the resin film 4 is placed on the hole layer 2, and a heat treatment is performed at a temperature at which the glass constituting the hole layer 2 softens.
  • the metal foil 3 is brought into contact with the mouth layer 2 prior to the heat treatment.
  • the resin film 4 may be brought into contact with the mouth layer 2.
  • the hood layer was formed on both sides of metal plate 1,
  • the method shown in FIG. 2 is particularly advantageous for forming a complicated buttery circuit as shown in FIG.
  • Substrate examples of the metal plate include aluminum plate, aluminum steel plate, low carbon steel plate, steel plate for steel, stainless steel plate, nickel chrome steel plate, nickel chrome steel plate Aluminum steel sheets are used.
  • the glass layer covering the substrate is required to have excellent electrical insulation. Therefore, the glass frit constituting the glassy layer is preferably a low-altitude glass having excellent electric ecstasy.
  • Table 1 shows glass compositions suitable for application to metal plates and glass compositions used in the following examples.
  • Table 2 shows examples of slip compositions for forming the glassy layer. Unlike the slip composition for forming a general glassy layer, an organic solvent is used as a solvent and ethyl cellulose is used as a stabilizer. This is commonly used This is because the addition of clay or sodium nitrite degrades the electrical insulation of the vitreous layer.
  • the organic solvent used for the slip may be, besides benzyl alcohol, isophorone, cyclohexanol, canolebitone, ethyl alcohol, or the like. Further, as a stabilizer, soluble in organic solvents, it is the this using a small amount of thickener for oxidative combustion in 1 5 ⁇ 3 5 o ° c . In order to further enhance the electrical insulation ⁇ vitreous layer, it can be used as the S ⁇ 0 2, A 2 0 3 , MgO, Zr0 2 and mil additive compounds containing these.
  • a vitreous layer (open layer) on a metal substrate
  • the firing temperature is suitably 8O O to 850 ° C, but if the time is short, the temperature can be raised, and if firing for a long time, the temperature can be lowered.
  • the thickness of the mouth opening layer is preferably from 100 to 300 uw from the viewpoint of surface state and electrical insulation.
  • the method of manufacturing the HO mouth substrate by the spray method was described.
  • the glass composition shown in Table 1 was converted into a micro force busel, and the powder was subjected to the electrostatic glazing method and the electrophoretic glazing method.
  • the ceramic used in the present invention is most preferably an aluminum substrate.
  • One side of the aluminum substrate is coated with a glass layer.
  • the glass material used here is different from the glass composition shown in Table 1 above. However, a glass composition that matches the expansion coefficient of lumina must be selected. Table 3 shows suitable glass compositions.
  • the above-mentioned glass frit is synthesized into paste-like ink using an oil agent (Ski Geooil), screen-printed, dried, and fired.
  • the film thickness at this time is preferably set to 50 to 100 oo im.
  • (C) Resin Film The role of the resin film used in the present invention is to fix the metal foil forming the circuit pattern, and after the circuit pattern of the metal foil covered with the resin film is set on the substrate Is removed by firing. Therefore, the resin film used here is highly flammable and has a glassy layer and • Must not adversely affect metal foil.
  • Acrylic resin and vinyl chloride resin are examples. Polyacrylic acid esters and polyacrylic acid esters are used as acrylic resins. A copolymer of butyl chloride and acrylate is also used.
  • These resins have low heat shrinkage and are highly flammable compared to those commonly used as materials for printed circuit boards, such as polyester-polyimide or epoxy resins. Can be formed on a substrate with high accuracy.
  • the above resin is dissolved in a suitable solvent to adjust the viscosity, and coated on a metal foil by spraying or printing, or laminated with a metal foil using a film of these resins.
  • Strips made of simple metals such as copper, aluminum, iron, nickel, chromium, zinc, and the like, or alloys thereof are preferred. If copper is used as an example of a single metal, the rolled copper ribbon is preferred as the electrolytic copper ribbon because of its high cost. In the present invention, even if a rolled ribbon is used, the adhesive strength is much higher than each of the conventional printed circuit boards. Therefore, it is not necessary to use an electrolytic copper ribbon for the purpose of improving the bonding strength. Examples of alloys include SUS 3 O 4, 3 16, 430,
  • the thickness of the rolled ribbon is preferably in the range of 2 O to 2 OO iw, particularly preferably in the range of 20 to ⁇ 2.0 ixm.
  • the rolling thickness exceeds 2 OOiw, the glass layer is easily cracked5 due to the tension and elasticity of the ribbon, and the ribbon is separated. In the following ribbons Workability is worsened.
  • the temperature must be higher than the softening point of the glass frit constituting the vitreous layer.
  • the atmosphere during heating is preferably a non-oxidizing atmosphere.
  • copper foil is heated in air, one or more the degree at 00-200, the surface is oxidized, irregular occurs in the resistor, also Ru poor hung with of the electronic component.
  • an atmosphere having oxygen necessary for removing the resin film by combustion it is needless to say that it is necessary to use an atmosphere having oxygen necessary for removing the resin film by combustion.
  • Stainless steel SUS430 and an aluminum substrate are used as the substrate on which the glass layer is formed. Both the size 1 1 OX 1 1 O mm, a thickness of 0.8 discussions 0
  • the second table of the scan Li Tsu urchin by the thickness of the flop is about 1 5 O ⁇ , and SPRAY on both sides, after drying 8 2 O ° C 1
  • a ⁇ substrate was obtained.
  • the glass shown in Table 3 was pasted into a paste shape using a squid geo-oil, applied by screen printing so that the film thickness became approximately SOiW, and dried. Thereafter, it was baked at SOO ° C for 1 O minute.
  • the copper foil pattern coated with acrylic resin is in close contact with the glassy layer), there is no unburned resin, the oxide film is large on the surface of the copper foil, and the glass There was no abnormality in the stratum.
  • the polyester film and the polyimide film of the comparative examples a part of the copper foil did not adhere to the glass layer, and the copper foil and the glass layer surface did not adhere. Unburned material remains] 5, cracks were found in the glassy layer.
  • Example 1 to form a glass electrolyte layer stainless steel SUS 4 3 ⁇
  • an electric furnace by placing the same accession Li Le resins coated copper foil pattern as that used in this Example 1 Then, while flowing the same nitrogen-hydrogen mixed gas as in Example 1 , each was heated at 80 ° C., 7 ° C., 20 ° C., 4 ° C., and 760 ° C. for 1 hour each. Bake for O minutes.
  • the vitreous layer and the copper foil are bonded and ⁇ Cured at 720 ° C, T4O ° C, and 760 ° C, the copper foil was welded to the glassy layer, and especially baked at 760 ° C had good adhesion. It was stronger than others.
  • the resin-coated pattern was placed on the substrate having the glass layer, and the slips shown in Table 2 were applied thereon as a protective layer. Firing was performed at a temperature of 80 ° C. in an electric furnace through which nitrogen gas was passed.
  • the solution of the acrylic resin used in Example 1 was screen-printed on 5 O ⁇ -thick rolled copper foil, dried with, and then etched. Formed.
  • Example 1 E - is placed in the mouth substrate, in an electric furnace that was circulated a mixed gas of nitrogen and hydrogen in the same manner as in Example 1, at SOO It was baked at a temperature for 5 minutes to obtain an electronic camera hood circuit board.
  • This circuit board has extremely stable circuit resistance.] 9 In addition, no circuit errors occurred for large currents or small currents.
  • the present invention it is possible to obtain a high-precision, high-density circuit board that is excellent in heat dissipation and strength, withstands a very small current, and can withstand a large current.
  • the use of a metal substrate has a shield effect against electric and magnetic fields. Therefore, it is useful for various electronic devices including electronic cameras.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Insulated Metal Substrates For Printed Circuits (AREA)
  • Laminated Bodies (AREA)

Abstract

Electrically conductive circuit board in which a metal foil forming a circuit pattern is melted onto a vitreous layer which covers the board so as to adhere thereto. Further disclosed herein is a method of producing an electrically conductive circuit board, wherein a metal foil forming a circuit pattern and a combustible resin film supporting the metal foil are placed on the vitreous layer, then heated at a temperature to soften the glass which constitutes the vitreous layer, the resin film is removed by burning, and the metal foil is melted onto the vitreous layer so as to adhere to it. Compared with the conventional counterparts which use a resin board, the circuit board of the invention exhibits excellent heat dissipation characteristics and strength, as well as increased precision and density.

Description

• 明 細 書  • Specification
発明の名称  Title of invention
導電回路基板およびその製造法  Conductive circuit board and method of manufacturing the same
技術分野  Technical field
5 本発明は、 各種の電子機器に用いられる導電回路基板、 特に、 高精度の導電回路を有し、 比較的大電流に耐える導電回路基板 及びその製造法に関する。  5 The present invention relates to a conductive circuit board used for various electronic devices, particularly to a conductive circuit board having a high-precision conductive circuit and withstanding a relatively large current, and a method for manufacturing the same.
背景技術  Background art
従来、 市販されている代表的 回路基板は、 フ X ノ ー ル樹脂、 l O ガ ラス繊維入 ]9 エポキシ樹脂を用いたものである。 これらの基 板は、 熱放散性が悪いものが大きる欠点とるっている。 大電流 を流すよ うに設計された抵抗体や電力用 ト ラン ジスタを組み込 んだ集積回路では、 発熱量が大きいため、 その熱によ って、 コ ンデンサ どの熱に弱い周辺の部品や、 抵抗体 , ト ラ ンジス タ Conventionally, a typical circuit board that is commercially available is a board that uses X-nor resin and 10-glass epoxy resin-containing epoxy resin. These substrates are disadvantageous in that they have poor heat dissipation. An integrated circuit that incorporates a resistor or power transistor designed to carry a large current generates a large amount of heat. Resistor, transistor
1 5 自身を破損させることがある。 また、 破損に至ら までも、 それら部品の電気特性を大き く変化させる不都合が生じる。 1 5 May damage itself. In addition, there is the inconvenience that the electrical characteristics of those components change significantly even before they are damaged.
最近では、 基材と して金属板を用いたものが脚光を浴び始め ている。 金属基板を用いたものと しては、 エポキシ樹脂で被覆 したもの、 ホー口層を設けたもの どがある。 特に、 ホ— 口基 0 板は、 機械的強度 強く、 耐熱性や熱放散性に優れてお i?、 ま た、 電磁シ ール ド効果があることから、 大電力用の回路基板と して有効とされている。  Recently, those using metal plates as the base material have begun to attract attention. Metallic substrates include those coated with epoxy resin and those with a hood layer. In particular, the E 0 base plate has high mechanical strength and excellent heat resistance and heat dissipation. Also, because of the electromagnetic shielding effect, it is considered to be effective as a circuit board for high power.
しかし、 ホー口基板を用いた回路の形成法は、 Au , A g , P t, ' C u 等の粉末を結合剤と混合してペース ト状にし、 これをスク 5 リ ー ン印刷し、 熱処理して回路を形成する方法である。 このよ • う ペース トを用いた回路は、 電気抵抗が高く、 かつ回路抵抗 誤差も大きいことから、 大電流や微小電流を通電する回路では、 回路の発熱や誤動作等の問題が生じる。 However, a method of forming a circuit using a hood substrate is to form a paste by mixing powders of Au, Ag, Pt, and Cu with a binder, and screen-print the paste. This is a method of forming a circuit by heat treatment. This • Circuits that use high-speed pastes have high electrical resistance and large circuit resistance errors, so circuits that carry large or small currents may cause problems such as circuit heating and malfunction.
上記のように、 ホ ー口基板を高密度 , 高精度の回路用基 に As described above, the hood substrate is used as a high-density, high-precision circuit base.
5 応用した 要請があるが、 回路形成に問題があるため、 実用化 されていな 。 5 There is a demand for application, but it has not been put into practical use due to problems in circuit formation.
発明の開示  Disclosure of the invention
本発明は、 以上に鑑み、 比較的大電流の通電が可能 ¾高精度 の導電回路を有する回路基板を提供することを目的とする。 i o 本発明はまた、 高精度の導電バタ一ンを形成する金属箔をそ のパターンを変形させることる く 、 基板上に固定して回路基板 を得る方法を提供することを目的とする。  In view of the above, an object of the present invention is to provide a circuit board having a high-precision conductive circuit capable of conducting a relatively large current. Another object of the present invention is to provide a method for obtaining a circuit board by fixing a metal foil forming a high-precision conductive pattern on a board without deforming its pattern.
本発明の導電回路基板は、 表面にガ ラス質被覆層を有する基 板と、 前記ガラス質層の表面に溶着されて、 導電回路パターン A conductive circuit board according to the present invention includes a substrate having a glassy coating layer on a surface thereof, and a conductive circuit pattern welded to the surface of the glassy layer.
1 5 を形成して る金属箔とから構成される。 And 15 of the metal foil.
ここで、 前記の基板としては、 ホ— 口被覆層を有する金属板 が好ま しいが、 アル ミ ナ , ベリ リアなどのセラ ミ ック基板にガ ラ ス質層を形成したものを用いることができる。  Here, as the substrate, a metal plate having a hole covering layer is preferable, but a substrate in which a glassy layer is formed on a ceramic substrate such as aluminum or beryllia may be used. it can.
本発明の導電回路基板を製造する方法を大別すると 2つある。  The method of manufacturing the conductive circuit board of the present invention is roughly classified into two methods.
20 その 1 つは、 表面にガラ ス質層を有する基板の前記ガ ラス質層 表面に、 回路パターンを形成している金属箔を設置し、 前記ガ ラス質層を檮成するガラ スの軟化する温度に加熱して前記金属 箔をガ ラス質層に溶着する方法である。 前記の加熱する雰囲気 は、 銅のよ うに酸化されやすい金属箔を用いる場合は、 非酸化 20 One of them is to place a metal foil forming a circuit pattern on the surface of the glass layer of the substrate having the glass layer on the surface, and to soften the glass which forms the glass layer. And fusing the metal foil to the glass layer by heating to a desired temperature. The above heating atmosphere is non-oxidizing when using a metal foil that is easily oxidized such as copper.
25 性雰囲気であるのがよい。 非酸化性雰囲気と しては、 各種の不 • 活性ガス雰囲気を利用できるが、 窒素 , アル ゴ ン及び水素よ ]? る群から選んだ 1 種のガス又は 2種以上の混合ガス雰囲気を 用いるのが便利である。 It is good to have a 25-sex atmosphere. Various non-oxidizing atmospheres • An active gas atmosphere can be used, but it is convenient to use an atmosphere of one type of gas or a mixture of two or more types selected from the group consisting of nitrogen, argon and hydrogen.
. 導電回路基板を製造する方法の他の 1 つは、 表面にガ ラ ス質 Another method of manufacturing a conductive circuit board is to use a glass surface.
5 層を有する基板の前記ガ ラス質層の表面に、 熱収縮が小さくか つ燃焼性に富む樹脂膜に支持された導電回路パタ —ンを設置し、 加熱によ U前記樹脂膜を燃焼させて除去するとともに、 前記ガ ラス質層を構成するガ ラスを軟化させて前記導電回路パタ ー ン を前記ガ ラ ス質層に溶着する方法である。 A conductive circuit pattern supported by a resin film having low heat shrinkage and high flammability is provided on the surface of the glass layer of a substrate having five layers, and the resin film is heated by heating. And a method of softening a glass constituting the glass layer and welding the conductive circuit pattern to the glass layer.
i o ここで、 前記樹脂膜に支持された回路パタ ー ンを形成するに は、 金属箔の片面に前記樹脂膜を被覆した後、 前記金属箔をヱ ツ チ ングして所定の回路パタ ー ンに形成する方法と、 金属箔の 片面に前記樹脂膜を被覆した後この樹脂膜と一体の金属箔を打 ち抜き加工によ i9所定の回路パタ ー ンにする方法とがある。 前Here, in order to form a circuit pattern supported by the resin film, one side of a metal foil is coated with the resin film, and then the metal foil is touched to a predetermined circuit pattern. And a method in which one surface of a metal foil is coated with the resin film, and then a metal foil integrated with the resin film is punched into a predetermined circuit pattern. Previous
1 5 者の方法では、 樹脂膜は完全 シー ト の形態を維持しているの で、 特に微細る部分を含む回路パタ ーンの場合に 回路パタ ー ンの形状を変形させることな く基板上に固定するのに有利であ る o In the method of (15), since the resin film maintains the form of the complete sheet, the circuit pattern is not particularly deformed on the substrate, especially in the case of a circuit pattern including a fine portion. O It is advantageous to fix to
図面の簡単な説明 BRIEF DESCRIPTION OF THE FIGURES
0 第 1 図は本発明の導電回路基板の例を示す縦断面図、 第 2図 はその製造工程を示す図、 第 3図及び第 4図は回路パタ ーンの 例を示す平面図である。  FIG. 1 is a longitudinal sectional view showing an example of the conductive circuit board of the present invention, FIG. 2 is a view showing the manufacturing process thereof, and FIGS. 3 and 4 are plan views showing examples of the circuit pattern. .
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
第 1 図は本発明の導電回路基板の構成例を示す。 1 は金属基 5 板、 2はその表面を被覆するガラス質層、 この例ではホー口層 • である。 3はホ—口層 2の表面に溶着された金属箔で、 所定の パターンを有するものである。 FIG. 1 shows a configuration example of a conductive circuit board of the present invention. 1 is a metal substrate 5 and 2 is a vitreous layer covering its surface •. Reference numeral 3 denotes a metal foil welded to the surface of the mouth layer 2 and has a predetermined pattern.
第 2図は上記の導電回路基板を得る工程を示している。 3 a は金属箔であ 、4はその片面に被覆した樹脂膜である。 この樹FIG. 2 shows a process for obtaining the above-mentioned conductive circuit board. 3a is a metal foil, and 4 is a resin film coated on one side thereof. This tree
5 脂膜 4は熱による変形、 特に熱収縮が小さく、 しかも燃焼性に 富むものである。 この樹脂膜 4の形成方法と しては、 樹脂を適 当な溶剤に溶かした溶液を金属箔 3 aの表面に塗布するか、 ス ク リ —ン印刷によ 一様の厚さに付着させ、 乾燥する方法と、 あらかじめ形成した樹脂膜を、 燃焼によ 除去可能る結着剤に i o よ つて金属箔に接着する方法とがある。 5 The oil film 4 has a small deformation due to heat, in particular, a small heat shrinkage, and is highly flammable. As a method for forming the resin film 4, a solution obtained by dissolving the resin in an appropriate solvent is applied to the surface of the metal foil 3a, or is adhered to a uniform thickness by screen printing. There is a method of drying, and a method of bonding a resin film formed in advance to a metal foil by using a binder that can be removed by combustion.
次に、 金属箔 3 aをエッ チングすることによ 所定のパター ンの導電回路を有する金属箔.3にする。 樹脂膜 4 と一体の金属 箔 3を上記のホ— 口層 2の上に設置し、 ホー口層 2を構成する ガラスの軟化する温度で熱処理をする。 この熱処理によ j?樹脂Then, the metal foil. 3 having a conductive circuit having a predetermined pattern by to edge quenching the metal foil 3 a. The metal foil 3 integrated with the resin film 4 is placed on the hole layer 2, and a heat treatment is performed at a temperature at which the glass constituting the hole layer 2 softens. By this heat treatment
1 5 膜 4は燃焼によ ]?除去され 金属箔 3はホー口層 2に溶着され 1 5 Membrane 4 is removed by combustion]? Metal foil 3 is welded to hood 2
o  o
第 2図の例では、 熱処理に先立つて金属箔 3がホ—口層 2と 接するよ うにしたが、 樹脂膜 4がホ一口層 2 と接するようにし ても よい。 また、 ホー口層は金属板 1 の両面に形成したが、 片 In the example of FIG. 2, the metal foil 3 is brought into contact with the mouth layer 2 prior to the heat treatment. However, the resin film 4 may be brought into contact with the mouth layer 2. The hood layer was formed on both sides of metal plate 1,
20 面にのみ形成しても よい。 It may be formed only on 20 surfaces.
第 2図に示した方法は、 特に第 3図に示すよ うな複雑なバタ —ンの回路を形成するのに有利である。  The method shown in FIG. 2 is particularly advantageous for forming a complicated buttery circuit as shown in FIG.
次に、 本発明の導電回路基板の製造に用いられる材料につい て説明する。  Next, materials used for manufacturing the conductive circuit board of the present invention will be described.
25 (a) 基 板 金属板と しては、 アル ミ ニ ウ ム板 , アル ミ ナ ィ ズ ド鋼板 , 低 炭素鋼板 , ホ — 口用鋼板 , ステ ン レス鋼板 , ニ ッ ケルク ロ ム鋼 板 , ニ ッ ケルク ロ ム アル ミ鋼板などが用いられる。 25 (a) Substrate Examples of the metal plate include aluminum plate, aluminum steel plate, low carbon steel plate, steel plate for steel, stainless steel plate, nickel chrome steel plate, nickel chrome steel plate Aluminum steel sheets are used.
—方、 セ ラ ミ ッ ク板と しては、 アル ミ ナ , ベ リ リアなどが用 いられる力 大きな基板の作成が困難であ!)、 機械的 ¾ ス ト レ スで破壤しゃすいので、 使用が限定される。  —On the other hand, it is difficult to make a large board that can use aluminum, veleria, etc. as a ceramic board! ), Mechanical ¾ Stress is limited due to the stress and the soil.
(¾ ガ ラス質層  (¾ Glass layer
基板に被覆するガ ラ ス質層は、 電気絶縁性に優れていること が要求される。 従ってガ ラス質層を構成するガ ラ ス フ リ ッ トは、 電気絶緑性の優れた低アル力 リ ガ ラスが好ま し 。 第 1 表は、 金属板に適用するのに適したガ ラ ス組成と、 以下の実施例で用 いるガ ラス組成とを示している。 The glass layer covering the substrate is required to have excellent electrical insulation. Therefore, the glass frit constituting the glassy layer is preferably a low-altitude glass having excellent electric ecstasy. Table 1 shows glass compositions suitable for application to metal plates and glass compositions used in the following examples.
(重量^ ) (Weight ^)
Figure imgf000007_0001
Figure imgf000007_0001
また、 第 2表は、 ガラ ス質層を形成するためのス リ ッ プ組成の 例を示している。 通常の一般ガ ラ ス質層を形成するときのス リ ツプ組成とは異 、 溶媒として有機溶剤を用い、 安定剤とし てェチルセル ロ ー スを用いている。 これは、 通常用いられてい る粘土や亜硝酸ソ一ダ等を添加すると、 ガラス質層の電気絶緣 性が劣化するためである。 Table 2 shows examples of slip compositions for forming the glassy layer. Unlike the slip composition for forming a general glassy layer, an organic solvent is used as a solvent and ethyl cellulose is used as a stabilizer. This is commonly used This is because the addition of clay or sodium nitrite degrades the electrical insulation of the vitreous layer.
第 2 表 フ リ ッ ト 1 OO直量部  Table 2 Flit 1 OO direct part
有機溶剤 (ベンジノレアルコール) 50 " コロイ ド安定斉 [](ェチノ Hs/½i—ス ) 2 η  Organic solvent (benzinole alcohol) 50 "Colloidal stability [] (Etino Hs / ½i—s) 2 η
なお、 ス リ ッ プに用いる有機溶剤はベ ン ジルアル コ ー ルの他 に 、 イ ソ ホ ロ ン , シク ロへキサノ 一 ノレ , カノレ ビ ト ーノレ , ェチレ ン グ リ コー ル等でも よい。 また、 安定剤と しては、 有機溶剤に 可溶で、 1 5 ο〜 3 5 o °cで酸化燃焼する増粘剤を少量用いる こ とができる。 また、 ガラス質層の電気絶緣性をさらに高める ために、 S ί02 , A 203,MgO , Zr02 やこれらを含む化合物 をミ ル添加剤と して用いることも できる。 The organic solvent used for the slip may be, besides benzyl alcohol, isophorone, cyclohexanol, canolebitone, ethyl alcohol, or the like. Further, as a stabilizer, soluble in organic solvents, it is the this using a small amount of thickener for oxidative combustion in 1 5 ο~ 3 5 o ° c . In order to further enhance the electrical insulation緣性vitreous layer, it can be used as the S ί0 2, A 2 0 3 , MgO, Zr0 2 and mil additive compounds containing these.
金属基板にガラス質層 ( ホ一 口層 ) を形成するに際しては、 第 2表のよ うるス リ ップを調合し、 ボールミル等で混合して、 スブレーガン等で金属基板に塗布する。 その後乾漦して焼成す る。 焼成温度は、 8 O O〜8 5 0°Cが適当であるが、 時間が短 い場合は温度を高く し、 長時間かけて焼成する場合は温度を低 くすることができる。 また、 ホー口層の膜厚は、 表面状態ゃ電 気絶緣性から 1 0 0 ~ 3 0 0 uw が好ま しい。  When forming a vitreous layer (open layer) on a metal substrate, mix the slips shown in Table 2 and mix them with a ball mill or the like, and apply them to the metal substrate with a spray gun or the like. Thereafter, it is dried and fired. The firing temperature is suitably 8O O to 850 ° C, but if the time is short, the temperature can be raised, and if firing for a long time, the temperature can be lowered. Further, the thickness of the mouth opening layer is preferably from 100 to 300 uw from the viewpoint of surface state and electrical insulation.
ここでは、 スプレー法によるホー口基板の製造法について記 述したが、 第 1 表のガラス組成のものをマイ クロ力ブセル化し て粉体静電施釉方法や電気泳動施釉方法によ つても ホ— 口基板 を製造するこ とができ る。 次にセ ラ ミ ックにガラ ス質層を被覆する場合について述べる。 本発明に用いられるセ ラ ミ ックは、 アル ミ ナ基板が最も適し ている。 アル ミ ナ基板の片面にガ ラ ス質層を被覆する。 ここで 用いられるガラ ス質は前記第 1 表のガラ ス組成とは異な ] 、 了 ルミ ナの膨張係数に合ったガラ ス組成を選択し ¾ければ らる い。 適したガラ ス組成を第 3表に示す。 Here, the method of manufacturing the HO mouth substrate by the spray method was described. However, the glass composition shown in Table 1 was converted into a micro force busel, and the powder was subjected to the electrostatic glazing method and the electrophoretic glazing method. Mouth board Can be manufactured. Next, the case of coating the glass with a glass layer will be described. The ceramic used in the present invention is most preferably an aluminum substrate. One side of the aluminum substrate is coated with a glass layer. The glass material used here is different from the glass composition shown in Table 1 above. However, a glass composition that matches the expansion coefficient of lumina must be selected. Table 3 shows suitable glass compositions.
第 3 表  Table 3
(重量^ )  (Weight ^)
Figure imgf000009_0001
ガラス質層を形成する場合は、 上記ガラスフ リ ッ ト を油剤 (ス キ一 ジオイ ル ) でペー ス ト状ィ ンキに合成してスク リ ー ン印刷 し、 乾燥後、焼成する。 このときの膜厚は 5 0 ~ 1 O O i m にす るのが好ま しい。
Figure imgf000009_0001
When forming a vitreous layer, the above-mentioned glass frit is synthesized into paste-like ink using an oil agent (Ski Geooil), screen-printed, dried, and fired. The film thickness at this time is preferably set to 50 to 100 oo im.
(C) 樹脂膜 本発明に用いる樹脂膜の役割は、 回路パターンを形成する金 属箔の固定に用いるも ので、 樹脂膜を被 Sした金属箔の回路パ タ一ンを基板へ設置した後は、 焼成に よ つて除去される。 従つ て、 ここに用いる樹脂膜は、 燃焼性に富み、 かつガラ ス質層や • 金属箔に悪影響を及ぼさ ¾い も のでなければならない。 ァク リ ル樹脂 ,塩化ビニル樹脂がその例である。 ァク リル樹脂として は、 ポリ メ タ ク リ ル酸エステルやポ リ ァク リ ル酸エステルを用 いる。 また塩化ビュルとァクリル酸エステルの共重合体も用い られる ο (C) Resin Film The role of the resin film used in the present invention is to fix the metal foil forming the circuit pattern, and after the circuit pattern of the metal foil covered with the resin film is set on the substrate Is removed by firing. Therefore, the resin film used here is highly flammable and has a glassy layer and • Must not adversely affect metal foil. Acrylic resin and vinyl chloride resin are examples. Polyacrylic acid esters and polyacrylic acid esters are used as acrylic resins. A copolymer of butyl chloride and acrylate is also used.
これらの樹脂は、 ポリ エステルゃポリイ ミ ドあるいはエポキ シ 樹脂といった通常プリ ン ト基板の材料に用いられているものに 比べ、 熱収縮が小さ 燃焼性に富んでいるので、 金属箔の回路 パタ ー ンを高精度に、 基板上へ形成させることができる。  These resins have low heat shrinkage and are highly flammable compared to those commonly used as materials for printed circuit boards, such as polyester-polyimide or epoxy resins. Can be formed on a substrate with high accuracy.
上記の樹脂を、 適当を溶剤に溶解して粘度を調整し、 スプ レ 一または印刷法で金属箔に被覆するか、 あるいは、 これら樹脂 の膜を用いて金属箔とラ ミ ネ ー トする。  The above resin is dissolved in a suitable solvent to adjust the viscosity, and coated on a metal foil by spraying or printing, or laminated with a metal foil using a film of these resins.
(d) 金属箔  (d) Metal foil
銅 , アル ミ ニ ウ ム ,鉄 , ニ ッ ケル , ク ロ ム ,亜鉛等の単体金5 属またはこれらの合金から ¾る薄帯が好ま しい。 単体金属とし て銅を例示すれば、 薄帯として電解銅薄帯はコ ス ト高と ¾るた め圧延銅薄帯が好ま しい。 本発明では圧延薄帯を甩いても従来 のブリ ン ト基板のぞれよ はるかに接着強度が大とるるので、 接合強度改善の目的で電解銅薄帯を用いる必要はない。 また合0 金の例と して、 ステン レス鋼の SUS 3 O 4 , 3 1 6 , 430 ,  Strips made of simple metals such as copper, aluminum, iron, nickel, chromium, zinc, and the like, or alloys thereof are preferred. If copper is used as an example of a single metal, the rolled copper ribbon is preferred as the electrolytic copper ribbon because of its high cost. In the present invention, even if a rolled ribbon is used, the adhesive strength is much higher than each of the conventional printed circuit boards. Therefore, it is not necessary to use an electrolytic copper ribbon for the purpose of improving the bonding strength. Examples of alloys include SUS 3 O 4, 3 16, 430,
4 4 4や、 Ni— Cr 合金、 Cu— P合金等の圧延薄帯が用いられ る。 また圧延薄帯の厚さは、 2 O 〜 2 O O iw 、 特に 2 0〜 Λ 2. 0 ixm の範囲が好ま しい。 圧延薄帝が 2 O O iw 以上にる ると薄帯の有する張力や弾性によ ]?、 ガラス質層に亀裂が生じ5 やすく 、 薄帯が剝離してしま う。 また 以下の薄帯では 作業性が逆に悪く なる。 Rolled strips of 444, Ni-Cr alloy, Cu-P alloy, etc. are used. Further, the thickness of the rolled ribbon is preferably in the range of 2 O to 2 OO iw, particularly preferably in the range of 20 to Λ 2.0 ixm. When the rolling thickness exceeds 2 OOiw, the glass layer is easily cracked5 due to the tension and elasticity of the ribbon, and the ribbon is separated. In the following ribbons Workability is worsened.
次に、 回路パ タ ー ンを形成する金属箔をガラ ス質層に溶着す ると きの条件について説明する。  Next, the conditions for welding the metal foil forming the circuit pattern to the glass layer will be described.
まず、 温度は、 ガラス質層を構成するガラ スフ リ ッ ト の軟化 点よ 高く しなければる らるい。 加熱時の雰囲気は非酸化性雰 囲気が好ま しい。 殊に銅箔は空気中で加熱すると、 1 00〜200 で程度以上では、 表面が酸化され、 抵抗に不揃いが生じ、 また 電子部品のハ ング付け性が悪く る。 しか し、 金属箔を支持す る樹脂膜を用いる場合は、 これを燃焼によ 除去するのに必要 酸素を有する雰囲気で ¾ければ ¾ら ¾いこ とはい う までも な い o First, the temperature must be higher than the softening point of the glass frit constituting the vitreous layer. The atmosphere during heating is preferably a non-oxidizing atmosphere. When particular copper foil is heated in air, one or more the degree at 00-200, the surface is oxidized, irregular occurs in the resistor, also Ru poor hung with of the electronic component. However, when a resin film that supports the metal foil is used, it is needless to say that it is necessary to use an atmosphere having oxygen necessary for removing the resin film by combustion.
以下、 本発明の好ま しい実施例の説明をするが、 本発明はこ れらの実施例に限定される ものでは ¾い。  Hereinafter, preferred embodiments of the present invention will be described, but the present invention is not limited to these embodiments.
実施例 1 . Example 1
ガ ラス質層を形成する基板と してステン レス鋼 S U S 4 3 0 とアル ミ ナ基板を用いる。 いずれも大き さは 1 1 O X 1 1 O mm, 厚さは 0.8議である 0 Stainless steel SUS430 and an aluminum substrate are used as the substrate on which the glass layer is formed. Both the size 1 1 OX 1 1 O mm, a thickness of 0.8 discussions 0
ステ ンレス鋼はサン ドブラス ト処理を施した後、 第2表のス リ ッ プを膜厚が約 1 5 O μΐη となる よ うに、 両面にス プレーし、 乾燥後 8 2 O °Cで 1 O分間焼成してホー π基板を得た。 また、 アル ミ ナ基板の片面には、 第 3表のガラ スをスキー ジオイ ルで ペース ト状にしたものをスク リ ーン印刷によ 膜厚が約 SO iW となるよ うに塗布 し、 乾燥後 S O O°Cで 1 O分間焼成した。 After stainless steel subjected to the San Doburasu preparative process, the second table of the scan Li Tsu urchin by the thickness of the flop is about 1 5 O μΐη, and SPRAY on both sides, after drying 8 2 O ° C 1 By baking for O minutes, a π substrate was obtained. On one side of the aluminum substrate, the glass shown in Table 3 was pasted into a paste shape using a squid geo-oil, applied by screen printing so that the film thickness became approximately SOiW, and dried. Thereafter, it was baked at SOO ° C for 1 O minute.
—方、 厚さ 5 O jam の電解銅箔の片面に、 三菱レー ヨ ン㈱よ ) L R — 7 5 8 Nの名で販売されているァク リ ル樹脂の有機溶 • 剤溶液を口 一ルコ ーターによ ] 9膜厚が3 O i に ¾るよ うに塗 布し、 1 O 0 Cで乾燥して樹脂膜を形成した。 比較例と して、 市販の銅張ボ リ エステルフ ィ ルム及び銅張ポリ イ ミ ドフ ィ ルム を用いる。 — On one side of a 5 O jam thick electrolytic copper foil, Mitsubishi Rayon Co., Ltd.) LR — Organic solution of acrylic resin sold under the name 758 N • The agent solution was applied by a mouth coater.] 9 A film thickness of 3 O i was applied and dried at 1 O 0 C to form a resin film. As a comparative example, commercially available copper-clad polyester film and copper-clad polyimide film are used.
5 これら 3種の銅箔をエ ッ チ ング して、 長さが 1 O O醒で幅が 5 Etch these three types of copper foil to make the length 1 O O
0.3龍 , 1 .0匪 , 2.0匪の 3本の回路部分を 1 O mm間隔に形成 した。 これらの銅箔パタ一ンを有する澍脂フィルムを銅箔側が ガラス質層と接するよ うに、 上記の基板上にのせて半密閉の電 気炉内へ揷入し、 電気炉内へ体積比で 9 5 %の窒素と 5 %の水 !O 素を混合したガスを流しながら、 7 8 0 Cの温度で 1 O分間熱 処理した。 ¾お、 このときの電気炉内の酸素濃度は 2 〜 3 %で <2>つた o Three circuit parts of 0.3 dragon, 1.0 marauder and 2.0 marauder were formed at 1 Omm interval. The resin film having these copper foil patterns is placed on the above-mentioned substrate so that the copper foil side is in contact with the vitreous layer, and inserted into a semi-closed electric furnace. while flowing 95% nitrogen and 5% water! it was mixed with O-containing gas, and 1 O min heat treatment at a temperature of 7 8 0 C. ¾ At this time, the oxygen concentration in the electric furnace was 2-3%, and <2> o
その結杲、 アク リ ル樹脂で被覆した銅箔パター ンは、 ガラス 質層に密着してお )、 樹脂の未燃澳物もる く、 銅箔の表面に酸 化膜は ¾ く 、 ガラス質層にも異常はなかった。 一方、 比較例の ポリ エステルフ イ ルム , ポリ ィ ミ ドフ イ ル ムを用いたものは、 銅箔の一部がガラ ス質層と溶着せず、 また銅箔の表面やガラ ス 質層表面に未燃焼物が残] 5 、 ガラ ス質層に亀裂が生じていた。 実施例 2 . As a result, the copper foil pattern coated with acrylic resin is in close contact with the glassy layer), there is no unburned resin, the oxide film is large on the surface of the copper foil, and the glass There was no abnormality in the stratum. On the other hand, in the case of using the polyester film and the polyimide film of the comparative examples, a part of the copper foil did not adhere to the glass layer, and the copper foil and the glass layer surface did not adhere. Unburned material remains] 5, cracks were found in the glassy layer. Example 2.
0 実施例1 と同様な方法でステンレス鋼 S U S 4 3 〇に ガラ ス 質層を形成し、 これに実施例 1 で用いたものと同じアク リ ル樹 脂被覆銅箔パター ンをのせて電気炉に入れ、 実施例 1 と同様の 窒素一水素混合ガスを流し がら、 ら 8 O ¾ , 7 O o°C , 20°C, ァ 4 O °C , 7 6 0°Cの各温度で各 1 O分間焼成した。 6 8 0"C, 25 7 O 0°Cで焼成したものはガラス質層と銅箔が接着されるかつ † o 7 2 0 °C , T 4 O °C , 7 6 0 °Cで焼成したも のはガラ ス質 層に銅箔が溶着され、 特に 7 6 0 ¾で焼成したも のは密着性が 他のものに比べ強かった。 0 Example 1 to form a glass electrolyte layer stainless steel SUS 4 3 〇 In a similar manner, an electric furnace by placing the same accession Li Le resins coated copper foil pattern as that used in this Example 1 Then, while flowing the same nitrogen-hydrogen mixed gas as in Example 1 , each was heated at 80 ° C., 7 ° C., 20 ° C., 4 ° C., and 760 ° C. for 1 hour each. Bake for O minutes. When fired at 680 ° C, 25 7 O 0 ° C, the vitreous layer and the copper foil are bonded and † Cured at 720 ° C, T4O ° C, and 760 ° C, the copper foil was welded to the glassy layer, and especially baked at 760 ° C had good adhesion. It was stronger than others.
実施例 3  Example 3
ガラス質層を形成させる基材と して厚さ O.Smmの S P P鋼板 を用い、 前処理を施した後、 第2表のス リ ッ プを膜厚が約 15〇 t に ¾る よ う に両面に塗布し、 乾燥後 8 2 0 °Cで 1 O分間焼 成した o Using a SPP steel sheet with a thickness of O.Smm as the base material on which the vitreous layer is formed, apply the pretreatment, and then apply the slip shown in Table 2 to a film thickness of about 15 t. Applied on both sides, dried and baked for 10 minutes at 820 ° C o
次に、 厚さ 6 O ^ のステ ンレス鋼 S U S 4 3 0の片面に、 塩化ビニルとァク リル酸ェチルの共重合樹脂の溶液をロ ー ルコ —ターによ 膜厚が 3 O xm になるよ う に塗布 し、 1 O 0°Cで 乾燥させた。 このステ ン レス鋼をエ ッ チングして第 4図のパタ ―ンを形成させた。 Next, a solution of a copolymer resin of vinyl chloride and ethyl acrylate was roll-coated on one surface of a stainless steel SUS430 having a thickness of 6 O ^ to a thickness of 3 Oxm using a roll coater. And dried at 1 0 ° C. This stainless steel was etched to form the pattern shown in Fig. 4 .
次に前記ガ ラ ス質層を有した基板上に上記樹脂被覆されたパ ター ンを設置し、 さらにその上に保護層と して第 2表のス リ ッ プを塗布 し、 乾燥後、 窒素ガスを流通させた電気炉で 8 O 0 °C の温度で焼成した。  Next, the resin-coated pattern was placed on the substrate having the glass layer, and the slips shown in Table 2 were applied thereon as a protective layer. Firing was performed at a temperature of 80 ° C. in an electric furnace through which nitrogen gas was passed.
その結果、 ガラス質層およびステンレス鋼箔パター ンと も変 化はな く 、 両者の密着 した回路基板が得られた。  As a result, there was no change in the vitreous layer and the stainless steel foil pattern, and a circuit board in which both were in close contact was obtained.
実施例 4 Example 4
5 O μτη 厚の圧延銅箔に、 実施例 1 で用いたァク リ ル樹脂の 溶液をスク リ ー ン印刷 し、 で乾燥した後、 エ ッ チ ング によ ]?第 3図の回路パタ ーンを形成させた。  The solution of the acrylic resin used in Example 1 was screen-printed on 5 Oμτη-thick rolled copper foil, dried with, and then etched. Formed.
これを、 実施例 1 のホ— 口基板に設置し、 実施例 1 と同様に 窒素と水素の混合ガスを流通させている電気炉で、 S O Oでの 温度で5分間焼成し、 電子カメラ用ホー口回路基板を得た。 この回路基板は、 極めて回路抵抗の安定したものであ ]9、 ま た、 大電流に対しても、 微小電流に対しても回路誤差を生じる ことがなかった。 This, of Example 1 E - is placed in the mouth substrate, in an electric furnace that was circulated a mixed gas of nitrogen and hydrogen in the same manner as in Example 1, at SOO It was baked at a temperature for 5 minutes to obtain an electronic camera hood circuit board. This circuit board has extremely stable circuit resistance.] 9 In addition, no circuit errors occurred for large currents or small currents.
産業上の利用可能性 Industrial applicability
本発明によれば、 熱放散性や強度に優れ、 微小電流はも とよ ]9大電流にも耐え、 しかも高精度 ,高密度の回路基板が得られ る。 また、 金属基板を用いることによ 、 電界や 磁界 に対し ても シー ル ド効果を有する。 従って電子カメラを始め、 各種の 電子機器に有用である。  According to the present invention, it is possible to obtain a high-precision, high-density circuit board that is excellent in heat dissipation and strength, withstands a very small current, and can withstand a large current. In addition, the use of a metal substrate has a shield effect against electric and magnetic fields. Therefore, it is useful for various electronic devices including electronic cameras.

Claims

• 請 求 の 範 囲 • The scope of the claims
1 . 表面にガラ ス質層を有する基板と、 前記ガラス質層表面に 溶着されて、 回路パター ンを形成している金属箔とからなる導 電回路基板。  1. A conductive circuit board comprising a substrate having a glassy layer on the surface and a metal foil welded to the surface of the glassy layer to form a circuit pattern.
2 . 請求の範囲第 1 項において、 前記基板が金属板である導電 回路基板。  2. The conductive circuit board according to claim 1, wherein the board is a metal plate.
3 . 請求の範囲第 1 項において、 前記基板がセラ ミ ック基板で ある導電回路基板。  3. The conductive circuit board according to claim 1, wherein the board is a ceramic board.
4 . 表面にガラ ス質層を有する基板の前記ガラ ス質層表面に、 回路パター ンを形成している金属箔を設匱し、 前記ガラ ス質層 を構成するガラ スの軟化する温度に加熱して前記金属箔をガラ ス質層に溶着する ことを特徵とする導電回路基板の製造 i¾ o 4. A metal foil forming a circuit pattern is provided on the surface of the glass layer of the substrate having the glass layer on the surface, and the temperature is set to a temperature at which the glass constituting the glass layer softens. Manufacturing a conductive circuit board characterized in that the metal foil is welded to the glass layer by heating.
5 . 請求の範囲第 4項において、 前記基板が金属.板である導電 回路基板の製造法。 5. The method according to claim 4, wherein the substrate is a metal plate.
6 . 請求の範囲第 4項に いて、 前記基板がセ ラ ミ ッ ク基板で ある導電回路基板の製造法。  6. The method for manufacturing a conductive circuit board according to claim 4, wherein the board is a ceramic board.
マ . 請求の範囲第 4項において、 前記加熱工程を非酸化性雰囲 気下で行う導電回路基板の製造法。  5. The method for manufacturing a conductive circuit board according to claim 4, wherein the heating step is performed in a non-oxidizing atmosphere.
8 . 請求の範囲第 7項において、 非酸化性雰囲気が窒素 , アル ゴン及び水素よ j? る群から選んだ 1 種のガス又は 2種以上の 混合ガス雰囲気である導電回路基板の製造法。  8. The method for manufacturing a conductive circuit board according to claim 7, wherein the non-oxidizing atmosphere is an atmosphere of one kind of gas selected from the group consisting of nitrogen, argon and hydrogen or a mixed gas of two or more kinds.
9 . 表面にガラス質層を有する基板の前記ガラ ス質層の表面に、 熱収縮が小さ く かつ燃焼性に富む樹脂膜に支持された導電回路 パター ンを設置し、 加熱によ 前記樹脂膜を燃焼させて除去す る と ともに、 前記ガラ ス質層を構成するガラ スを軟化させて前 • 記導電回路パターンを前記ガラス質層に溶着することを特徵と する導電回路基板の製造法。 9. A conductive circuit pattern supported by a resin film having low heat shrinkage and high flammability is provided on the surface of the glass layer of the substrate having a glass layer on the surface, and the resin film is formed by heating. Is removed by burning, and the glass constituting the glassy layer is softened and • A method for manufacturing a conductive circuit board, which comprises welding the conductive circuit pattern to the vitreous layer.
10. 請求の範囲第 9項において、 前記樹脂膜に支持された回路 パターンを形成する工程が、 金属箔の片面に前記樹脂膜を被覆 5 する工程と、 前記金属箔をエッ チングして所定の回路パター ン に形成する工程とからなる導電回路基板の製造法。  10. In claim 9, the step of forming a circuit pattern supported by the resin film comprises: a step of coating the resin film on one surface of a metal foil; and etching the metal foil by a predetermined method. A method for manufacturing a conductive circuit board, comprising the steps of forming a circuit pattern.
11 - 請求の範囲第 9項において、 前記樹脂膜に支持された回路 パター ンを形成する工程が、 金属箔の片面に前記樹脂膜を被覆 する工程と、 この樹脂膜と一体の金属箔を打ち抜いて所定の回0 路パター ンに形成する工程とからなる導電回路基板の製造法。  11-The method according to claim 9, wherein the step of forming a circuit pattern supported by the resin film includes: a step of coating the resin film on one surface of a metal foil; and punching a metal foil integral with the resin film. Forming a predetermined circuit pattern by using the method.
12. 請求の範囲第 9項において、 前記基板が金属板である導電 回路基板の製造法。  12. The method according to claim 9, wherein the substrate is a metal plate.
13. 請求の範囲第 9項において、 前記基板がセラミック基板であ る導電回路基板の製造法。 13. The method according to claim 9, wherein the substrate is a ceramic substrate.
5 14. 金属箔の片面に、 熱収縮が小さ ぐ、 かつ燃焼性に富む树脂 膜を形成する工程と、 前記金属箔をエ ッ チングして所定の回路 パターンにする工程と、 前記金属箔を前記樹脂膜とともに基板の ホー口被覆層の表面に設置し、 加熱処理によ 前記樹脂膜を燃 焼除去するとともに、 前記ホー口層を檮成しているガラスを軟0 化させて、 前記金属箔をホー口層に溶着するこ とを特徵とする 導電回路基板の製造法。 5 14. A step of forming a resin film having low heat shrinkage and high flammability on one side of the metal foil; a step of etching the metal foil to form a predetermined circuit pattern; The resin film is installed on the surface of the hood coating layer of the substrate together with the resin film, and the resin film is burned and removed by heat treatment, and the glass that forms the hood port layer is softened to form the metal. A method for manufacturing a conductive circuit board, which is characterized in that foil is welded to a hood layer.
5 Five
PCT/JP1985/000235 1984-04-27 1985-04-25 Electrically conductive circuit board and a method of producing the same WO1985005242A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019850700351A KR900006976B1 (en) 1984-04-27 1985-04-25 Electrically condcutive circuit board and method of producing the same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP59/86415 1984-04-27
JP59086415A JPS60229390A (en) 1984-04-27 1984-04-27 Method of producing porcelain circuit board
JP59141901A JPS6120395A (en) 1984-07-09 1984-07-09 Method of producing porcelain circuit board
JP59/141901 1984-07-09

Publications (1)

Publication Number Publication Date
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Country Link
KR (1) KR900006976B1 (en)
WO (1) WO1985005242A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS561798B2 (en) * 1974-07-18 1981-01-16
JPS57109392A (en) * 1980-12-26 1982-07-07 Suwa Seikosha Kk Circuit mounting substrate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS561798B2 (en) * 1974-07-18 1981-01-16
JPS57109392A (en) * 1980-12-26 1982-07-07 Suwa Seikosha Kk Circuit mounting substrate

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KR860700085A (en) 1986-01-31
KR900006976B1 (en) 1990-09-25

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