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EP0239901A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Conductive copper paste composition

Assignee: Tatsuta Electric Wire and Cable Co Ltd
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Filing: 1987-03-23
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Granted: —
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Expires: 2007-03-23
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Abstract

Abstract A conductive copper paste composition adapted to yield a highly conductive film receptive to solders without pretreatment is disclosed. This conductive paste comprises a copper metal powder, a resin component including a thermosetting resin, and an assortment of additives. In use, the paste is applied to an insulation substrate to a predetermined circuit pattern and cured in situ . Soldering can then be performed directly on the cured circuit. This contributes not only to the conductivity of the circuit but dispenses with the activation treatment and electroless plating or electroplating that have heretofore been essential prior to soldering. The invention, therefore, results in a substantial curtailment of production process and a proportional econimic advantage. In addition, this conductive paste can be used in such applications as electrode and through-hole connections, formation of electromagnetic and electrostatic shield layers, and so on in the manufacture and assembly of electronic components and circuits.

Inventors

  • 👤 Kazumasa Eguchi
  • 👤 Fumio Nakatani
  • 👤 Shinichi Wakita
  • 👤 Hisatoshi Murakami
  • 👤 Tsunehiko Midorigaokadanchi 32-204 Terada

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 23:16
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/14; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/0083; H01B1/20; H01B1/22; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 33 words
A conductive copper paste composition comprising a copper metal powder, a resin component including a thermosetting resin, a fatty acid or a metal salt thereof, a metal chelating agent and a soldering accelerator.
Claim 2
Dependent Claim 33 words
A conductive copper paste composition comprising a copper metal powder, a resin component including a thermosetting resin, a fatty acid or a metal salt thereof, a metal chelating agent and a soldering accelerator.
Claim 3
Dependent Claim 71 words
A conductive copper paste composition according to Claim 1 which comprises 100 weight parts of a mixture of 85 to 95 weight percent of said copper metal powder and 15 to 5 weight percent of said resin component, 1 to 8 weight parts of said fatty acid or metal salt thereof, 1 to 50 weight parts of said metal chelating agent, and 0.1 to 2.5 weight parts of said soldering accelerator.
Claim 4
Dependent Claim 22 words
A conductive copper paste composition according to Claim 1 or 2 wherein said resin component is exclusively composed of said thermosetting resin.
Claim 5
Dependent Claim 38 words
A conductive copper paste composition according to Claim 1 or 2 wherein said resin component consists of 2 to 30 weight percent of a metal surface activator resin and 98 to 70 weight percent of said thermosetting resin.
Claim 6
Dependent Claim 48 words
A conductive copper paste composition according to Claim 1 or 2 wherein said resin component consists of 2 to 30 weight percent of a metal surface activator resin, 5 to 50 weight percent of a granular phenolic resin and 93 to 20 weight percent of said thermosetting resin.
Claim 7
Dependent Claim 36 words
A conductive copper paste composition comprising a copper metal powder, a resin component including a metal surface activator resin and a thermosetting resin, a fatty acid or a metal salt thereof, and a metal chelating agent.
Claim 8
Dependent Claim 36 words
A conductive copper paste composition comprising a copper metal powder, a resin component including a metal surface activator resin and a thermosetting resin, a fatty acid or a metal salt thereof, and a metal chelating agent.
Claim 9
Dependent Claim 62 words
A conductive copper paste composition according to Claim 6 which comprises 100 weight parts of a mixture of 85 to 95 weight percent of said copper metal powder and 15 to 5 weight percent of said resin component, 1 to 8 weight parts of said fatty acid or metal salt thereof, and 1 to 50 weight parts of said metal chelating agent.
Claim 10
Dependent Claim 38 words
A conductive copper paste composition according to Claim 6 or 7 wherein said resin component consists of 2 to 30 weight percent of said metal surface activator resin and 98 to 70 weight percent of said thermosetting resin.
Claim 11
Dependent Claim 46 words
A conductive copper paste composition according to Claim 6 or 7 wherein said resin component consists of 2 to 30 weight percent of p-tert-butylphenol resin, 2 to 30 weight percent of said metal surface activator resin and 96 to 40 weight percent of said thermosetting resin.

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