Patent US5386000A successfully refreshed from Google Patents.
US5386000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature flexible die attach adhesive and articles using same
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1993-12-03
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Granted: 1995-01-31
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Expires: 2013-12-03
Abstract
Abstract Described is a flexible adhesive formulation for bonding a semiconductor device to a flexible substrate and a flexible card containing a semiconductor device which can be processed in a computer.
Inventors
- 👤 My N. Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:03
CPC Classifications
C; C07; C07C; C07C261/00; C07C261/02; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08K; C08K5/00; C08K5/0008; C08K5/0016; C09; C09J; C09J179/00; C09J179/04; H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H10; H10W; H10W20/00; H10W20/40; H10W40/00; H10W40/20; H10W40/25; H10W40/251; H10W70/00; H10W70/60; H10W70/699; H10W72/00; H10W72/071; H10W72/073; H10W72/07331; H10W72/07337; H10W72/30; H10W72/321; H10W72/325; H10W72/351; H10W72/352; H10W72/353; H10W72/354
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A flexible adhesive formulation having a ROC value of about 1 meter or above comprising the reaction product of a cyanate ester-containing material and at least one flexibilizer miscible with cyanate ester in the uncured state selected from the group consisting of elastomeric and thermoplastic modifiers selected from the group consisting of hydroxyl, amine, and epoxide reactive functional group containing compounds and mixtures thereof, said cyanate ester comprising a least 15 wt. % of the mixture to be reacted and said flexibilizer having a glass transition temperature less than about 25° C.
Claim 2
Dependent Claim
92 words
A flexible adhesive formulation having a ROC value of about 1 meter or above comprising the reaction product of a cyanate ester-containing material and at least one flexibilizer miscible with cyanate ester in the uncured state selected from the group consisting of elastomeric and thermoplastic modifiers selected from the group consisting of hydroxyl, amine, and epoxide reactive functional group containing compounds and mixtures thereof, said cyanate ester comprising a least 15 wt. % of the mixture to be reacted and said flexibilizer having a glass transition temperature less than about 25° C.
Claim 3
Dependent Claim
36 words
A flexible adhesive formulation according to claim 1 further comprising silver in an amount sufficient to function as a curing catalyst and to render said adhesive curable in not greater than 5 minutes at 200° C.
Claim 4
Dependent Claim
23 words
A flexible adhesive formulation according to claim 1 further comprising an alkylphenol, a metal-containing curing catalyst and an electrically and/or thermally conductive filler.
Claim 5
Dependent Claim
25 words
A flexible adhesive formulation according to claim 3 wherein said filler comprises silver in an amount of 60 to 90 wt. % of the formulation.
Claim 6
Dependent Claim
30 words
A flexible adhesive formulation according to claim 3 comprising 0.01 to 0.06 wt. % metal curing catalyst, 0.5 to 2 wt. % alkylphenol and up to 90 wt. % silver.
Claim 7
Dependent Claim
15 words
A flexible adhesive formulation according to claim 5 comprising 4 to 20 wt. % silver.
Claim 8
Dependent Claim
16 words
A flexible adhesive formulation according to claim 1 further comprising an electrically and/or thermally conductive filler.
Claim 9
Dependent Claim
15 words
A flexible adhesive formulation according to claim 7 comprising 60 to 90 wt. % silver.
Claim 10
Dependent Claim
16 words
A flexible adhesive formulation according to claim 1 further comprising up to 90 wt. % silver.
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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) | 1998-01-30 | 1998-08-01 | 1999-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-30 | 2002-08-01 | 2003-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-30 | 2006-08-01 | 2007-01-31 | $7700.00 | Window Closed / Lapsed |