JP2703756B2 - 混成集積回路基板上に薄膜および厚膜抵抗を同時に形成する方法 - Google Patents
混成集積回路基板上に薄膜および厚膜抵抗を同時に形成する方法Info
- Publication number
- JP2703756B2 JP2703756B2 JP8331291A JP33129196A JP2703756B2 JP 2703756 B2 JP2703756 B2 JP 2703756B2 JP 8331291 A JP8331291 A JP 8331291A JP 33129196 A JP33129196 A JP 33129196A JP 2703756 B2 JP2703756 B2 JP 2703756B2
- Authority
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- Japan
- Prior art keywords
- layer
- forming
- substrate
- photosensitive agent
- thin film
- Prior art date
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- 239000010408 film Substances 0.000 title claims description 37
- 239000000758 substrate Substances 0.000 title claims description 34
- 239000010409 thin film Substances 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 29
- 239000010949 copper Substances 0.000 claims description 24
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 12
- 239000010936 titanium Substances 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010931 gold Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 5
- 229910052715 tantalum Inorganic materials 0.000 claims description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 238000009713 electroplating Methods 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 238000007650 screen-printing Methods 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims 2
- 238000000151 deposition Methods 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010397 one-hybrid screening Methods 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/20—Resistors
- H01L28/24—Resistors with an active material comprising a refractory, transition or noble metal, metal compound or metal alloy, e.g. silicides, oxides, nitrides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/84—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being other than a semiconductor body, e.g. being an insulating body
- H01L21/86—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being other than a semiconductor body, e.g. being an insulating body the insulating body being sapphire, e.g. silicon on sapphire structure, i.e. SOS
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/13—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body combined with thin-film or thick-film passive components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/167—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed resistors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
- H05K1/092—Dispersed materials, e.g. conductive pastes or inks
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0302—Properties and characteristics in general
- H05K2201/0317—Thin film conductor layer; Thin film passive component
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0388—Other aspects of conductors
- H05K2201/0391—Using different types of conductors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/03—Metal processing
- H05K2203/0361—Stripping a part of an upper metal layer to expose a lower metal layer, e.g. by etching or using a laser
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/14—Related to the order of processing steps
- H05K2203/1461—Applying or finishing the circuit pattern after another process, e.g. after filling of vias with conductive paste, after making printed resistors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus 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
- H05K3/108—Apparatus 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 semi-additive methods; masks therefor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/388—Improvement of the adhesion between the insulating substrate and the metal by the use of a metallic or inorganic thin film adhesion layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S148/00—Metal treatment
- Y10S148/136—Resistors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
- Manufacturing Of Printed Wiring (AREA)
Description
抵抗を形成する方法に関し、特に混成集積回路(Hybrid
Integrated Circuit) 基板上に、両抵抗の長所を利用す
るために薄膜抵抗および厚膜抵抗を同時に形成する方法
に関する。
導線および抵抗が要求されるパターンに形成されて構成
される。このような混成集積回路の基板上に抵抗を形成
する方法として従来の方法は、図5aに示す通り、アル
ミナ基板1上に一種類の厚膜抵抗2のみを形成したり、
または図5bに示すようにアルミナ基板1上に一種類の
薄膜抵抗3のみを形成するものであるため、一つの基板
上に薄膜抵抗が有する高安定性および高信頼性の長所お
よび厚膜抵抗が有する高出力性の長所を同時に有するよ
り高い効率の混成集積回路を提供することができなかっ
た。本発明に関する混成集積回路の設計および制作に関
する一般的な技術内容に関しては、ROYDN D.JONES 著
『Hybrid Circuit Design and Manufacture』(198
2年)に紹介されている。
の基板上に薄膜抵抗が有する高安定性および高信頼性の
長所および厚膜抵抗が有する高出力性の長所を同時に有
するより高い効率の混成集積回路を提供することにあ
る。
に、混成集積回路基板上に薄膜および厚膜抵抗を同時に
形成する本発明の方法は、アルミナ基板1を準備する工
程と;前記基板1上に厚膜抵抗ペーストを設計されたパ
ターンでスクリーン印刷した後、乾燥、成形して厚膜抵
抗2を形成する工程と;前記厚膜抵抗2上に抵抗保護用
のペーストを塗布した後、乾燥、成形して厚膜抵抗保護
膜4を形成する工程と;前記基板上に薄膜抵抗形成用T
a層と伝導線形成用Ti層、Pd層、Cu層(Cu1)
を順次蒸着形成する工程と;前記Cu層(Cu1)上に
陰性感光剤層5を塗布形成する工程と;前記陰性感光剤
層5のうち、伝導線を形成する部位以外を紫外線に露光
させた後、現像し、陰性感光剤層5の未露光の部位を除
去する工程と;前記陰性感光剤層の除去により露出した
Cu層(Cu1)上に、更にCu層(Cu2)、Ni
層、Au層を順次電気めっき形成して伝導線を完成する
工程と;前記陰性感光剤層5の露光部位を除去する工程
と;前記Cu層(Cu2)、Ni層、Au層により伝導
線が形成された部位以外のTi層、Pd層、Cu層(C
u1)をエッチング除去する工程と;前記基板上に形成
された層上に陽性感光剤層6を塗布形成する工程と;前
記陽性感光剤層6のうち、薄膜抵抗を形成する部位以外
を紫外線に露光させて現像後除去する工程と;前記陽性
感光剤層6の除去により露出したTa層をエッチング除
去し、残余のTa層を薄膜抵抗と成す工程と;そして、
前記陽性感光剤層6の未露光部位を除去する工程とから
なる。
に基づいてより詳しく説明する。図1は本発明の方法に
より、必要な抵抗および伝導線などが形成された混成集
積回路基板の断面図を表わしたもので、図示される通り
本発明の方法は、混成集積回路基板1上に厚膜抵抗2と
薄膜抵抗3を同時に形成するものである。
び薄膜抵抗3を同時に形成するための本発明方法により
製造された前記図1に示す混成集積回路基板の製造工程
を示す図であり、基板1および同基板1上の形成構造物
の断面形状を用いて製造工程を順次図示したものであ
る。この工程図に基づいて本発明方法を詳細に説明する
と、先ず混成集積回路用の基板1を準備する(S1)。
る厚膜抵抗ペースト(thick film resistor paste) をエ
マルジョンメッシュ(emulsion mesh)を用いて設計され
たパターンでスクリーン印刷(screen print)した後、乾
燥、成形して厚膜抵抗2を形成する(S2)。
ー成分の抵抗保護膜ペーストを塗布した後、乾燥、成形
して厚膜抵抗保護膜4を形成する(S3)。ここで厚膜
抵抗2上に保護膜4を形成する理由は、前記厚膜抵抗2
は高出力性を有するが、大気に長時間露出すると、その
抵抗特性が変化しやすいためである。
lm resistor)形成用のTa層と、伝導線(conductor) 形
成用のTi層、Pd層、Cu層(Cu1)を金属蒸着(s
puttering)法で順次形成する(S4)。
光剤(negative photo resist) を塗布して陰性感光剤層
5を形成する(S5)。
スクを設置し、前記陰性感光剤層5のうち、伝導線形成
部位以外の部位を紫外線に露光させた後現像し、陰性感
光剤層5の未露光の部位を除去する(S6)。
露出したCu層(Cu1)の上に、更にCu層(Cu
2)、Ni層、Au層を順次電気めっき形成して伝導線
を形成する(S7)。
除去する(S8)。
Au層により伝導線が形成された部位以外のTi層、P
d層、Cu層(Cu1)をエッチングして除去する(S
9)。
ive photo resist) を塗布して陽性感光剤層6を形成す
る(S10)。
を素材とする薄膜抵抗形成部位以外の部位を紫外線に露
光して現像した後除去する(S11)。
露出したTaの部位をエッチングにより除去して他の残
存したTa層により薄膜抵抗3を形成する(S12)。
抵抗表面に残っている未露光部位を除去して所望の薄膜
抵抗3および厚膜抵抗2が共に形成された混成集積回路
基板1を得る。
の混成集積回路基板上に薄膜抵抗が有する高安定性およ
び高信頼性の長所および厚膜抵抗が有する高出力性の長
所を同時に有するより高い効率の混成集積回路を提供す
ることができた。
形態を通じて図示説明したが、本発明の技術的範囲は、
前記実施の形態に記載のもののみに制限されるものでは
なく、本発明の技術的範囲内において他の修正、変更な
どは実施に応じて適宜任意である。
の方法による基板の断面図である。
成される過程中、S1〜S5における基板断面図を以て
順次図示した工程図である。
成される過程中、S6〜S9における基板断面図を以て
順次図示した工程図である。
成される過程中、S10〜S13における基板断面図を
以て順次図示した工程図である。
抗のみが形成されたもの、(b)は、薄膜抵抗のみが形
成されたものを示す。
Claims (1)
- 【請求項1】 アルミナ基板を準備する工程と;前記基
板上に厚膜抵抗ペーストを設計されたパターンでスクリ
ーン印刷した後、乾燥、成形して厚膜抵抗を形成する工
程と;前記厚膜抵抗上に抵抗保護用のペーストを塗布し
た後、乾燥、成形して厚膜抵抗保護膜を形成する工程
と;前記基板上に薄膜抵抗形成用タンタル(Ta)層と
伝導線形成用チタン(Ti)層、パラジウム(Pd)
層、銅(Cu)層を順次蒸着形成する工程と;前記銅
(Cu)層上に陰性感光剤層を塗布形成する工程と;前
記陰性感光剤層のうち、伝導線を形成する部位以外を紫
外線に露光させた後、現像し、陰性感光剤層の未露光の
部位を除去する工程と;前記陰性感光剤層の除去により
露出した銅(Cu)層上に、更に銅(Cu)層、ニッケ
ル(Ni)層、金(Au)層を順次電気めっき形成して
伝導線を完成する工程と;前記陰性感光剤層の露光部位
を除去する工程と;前記銅(Cu)層、ニッケル(N
i)層、金(Au)層により伝導線が形成された部位以
外のチタン(Ti)層、パラジウム(Pd)層、銅(C
u)層をエッチング除去する工程と;前記基板上に形成
された層上に陽性感光剤層を塗布形成する工程と;前記
陽性感光剤層のうち、薄膜抵抗を形成する部位以外を紫
外線に露光させて現像後除去する工程と;前記陽性感光
剤層の除去により露出したタンタル(Ta)層をエッチ
ング除去し、残余のタンタル(Ta)層を薄膜抵抗と成
す工程と;そして、 前記陽性感光剤層の未露光部位を除去して所望の薄膜お
よび厚膜抵抗が共に形成された基板を得る工程とからな
ることを特徴とする混成集積回路基板上に薄膜および厚
膜抵抗を同時に形成する方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950050134A KR0162967B1 (ko) | 1995-12-14 | 1995-12-14 | 알루미나 기판 상에 박/후막 저항을 동시에 제조하는 방법 |
KR95-50134 | 1995-12-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09199820A JPH09199820A (ja) | 1997-07-31 |
JP2703756B2 true JP2703756B2 (ja) | 1998-01-26 |
Family
ID=19440251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8331291A Expired - Fee Related JP2703756B2 (ja) | 1995-12-14 | 1996-12-11 | 混成集積回路基板上に薄膜および厚膜抵抗を同時に形成する方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US5723359A (ja) |
JP (1) | JP2703756B2 (ja) |
KR (1) | KR0162967B1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1082882B1 (en) * | 1999-03-17 | 2007-10-31 | Motorola, Inc. | Method of manufacturing resistors |
US20040192039A1 (en) * | 2003-03-27 | 2004-09-30 | E Touch Corporation | Method of fabricating a multi-layer circuit structure having embedded polymer resistors |
US20040187297A1 (en) * | 2003-03-27 | 2004-09-30 | E Touch Corporation | Method of fabricating a polymer resistor in an interconnection via |
CN105826231B (zh) * | 2016-05-18 | 2019-01-18 | 中国电子科技集团公司第四十一研究所 | 在介质基片同一平面上集成两种方阻薄膜电路的图形电镀方法 |
CN114188300A (zh) * | 2021-12-03 | 2022-03-15 | 武汉利之达科技股份有限公司 | 一种薄膜厚膜混合集成陶瓷基板及其制备方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5055164A (en) * | 1990-03-26 | 1991-10-08 | Shipley Company Inc. | Electrodepositable photoresists for manufacture of hybrid circuit boards |
US5468672A (en) * | 1993-06-29 | 1995-11-21 | Raytheon Company | Thin film resistor and method of fabrication |
US5420063A (en) * | 1994-04-11 | 1995-05-30 | National Semiconductor Corporation | Method of producing a resistor in an integrated circuit |
-
1995
- 1995-12-14 KR KR1019950050134A patent/KR0162967B1/ko not_active IP Right Cessation
-
1996
- 1996-12-11 JP JP8331291A patent/JP2703756B2/ja not_active Expired - Fee Related
- 1996-12-11 US US08/764,697 patent/US5723359A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US5723359A (en) | 1998-03-03 |
KR0162967B1 (ko) | 1999-02-01 |
KR970052227A (ko) | 1997-07-29 |
JPH09199820A (ja) | 1997-07-31 |
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