US5204025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive paste composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1991-04-08
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Granted: 1993-04-20
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Expires: 2011-04-08
Abstract
Abstract A conductive paste composition is described, which comprises an epoxy resin having a diglycidylamino group, a resol type phenol curing agent, and copper powder. The paste composition exhibits excellent moisture resistance and adhesion and provides a cured film of high conductivity level.
Inventors
- 👤 Kimiko Yamada
- 👤 Katuyosi Yada
- 👤 Hiromu Inoue
- 👤 Yousui Nemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:13
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/28; C08G59/32; C08G59/3227; C08K; C08K3/00; C08K3/02; C08K3/08; C08L; C08L63/00; H01; H01B; H01B1/00; H01B1/20; H01B1/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
A conductive paste composition comprising an epoxy resin having a diglycidylamino group represented by the formula: ##STR2## a resol phenol curing agent, and copper powder, with said epoxy resin being present in a proportion of at least 80% by weight based on the total epoxy resins, said resol phenol curing agent being a resol phenol containing an amino group which is obtained by condensation of phenol and formaldehyde in the presence of ammonia, hexamethylenetetramine or a tertiary amine and being present at an equivalent ratio of from 0.5 to 1.5 to the total epoxy resins and said copper powder being present in an amount of from 100 to 800% by weight of the total amount of the total epoxy resins and the resol phenol curing agent.
Claim 2
Dependent Claim
126 words
A conductive paste composition comprising an epoxy resin having a diglycidylamino group represented by the formula: ##STR2## a resol phenol curing agent, and copper powder, with said epoxy resin being present in a proportion of at least 80% by weight based on the total epoxy resins, said resol phenol curing agent being a resol phenol containing an amino group which is obtained by condensation of phenol and formaldehyde in the presence of ammonia, hexamethylenetetramine or a tertiary amine and being present at an equivalent ratio of from 0.5 to 1.5 to the total epoxy resins and said copper powder being present in an amount of from 100 to 800% by weight of the total amount of the total epoxy resins and the resol phenol curing agent.
Claim 3
Dependent Claim
35 words
A conductive paste composition as claimed in claim 1, wherein said epoxy resin is selected from the group consisting of glycidyl derivatives of aromatic amines, glycidyl derivatives of alicyclic diamines, and glycidyl derivatives of aminophenols.
Claim 4
Dependent Claim
17 words
A conductive paste composition as claimed in claim 1, wherein said copper powder is electrolytic copper powder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |