Patent US5250600A successfully refreshed from Google Patents.
US5250600A
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Low temperature flexible die attach adhesive and articles using same
Assignee: Henkel Corp
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Filing: 1992-05-28
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Granted: 1993-10-05
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Expires: 2012-05-28
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
- 👤 Yuan Y. Chien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:17
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; G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/077; G06K19/07745; 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: 18
Claim 1
Independent Claim
40 words
A flexible adhesive formulation comprising the reaction product of a cyanate ester-containing material and at least one flexibilizer from the group of polyhydroxyl polymer compounds within at least one of the following formula: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.n --OH and/or HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.n --OH.
Claim 2
Dependent Claim
40 words
A flexible adhesive formulation comprising the reaction product of a cyanate ester-containing material and at least one flexibilizer from the group of polyhydroxyl polymer compounds within at least one of the following formula: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.n --OH and/or HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.n --OH.
Claim 3
Dependent Claim
32 words
A flexible adhesive formulation according to claim 1 wherein said polyhydroxyl polymer has a molecular weight in the range of about 200 to about 5000 and contains at least two hydroxy groups.
Claim 4
Dependent Claim
25 words
A flexible adhesive formulation according to claim 2 wherein said polyhydroxyl polymer compound is one from the group consisting of polyhydroxyl polyesters and polyhydroxyl polyethers.
Claim 5
Dependent Claim
18 words
A flexible adhesive formulation according to claim 1 having a viscosity of about 5 to about 50 poise.
Claim 6
Dependent Claim
41 words
A flexible adhesive formulation according to claim 1 further comprising silver flake and/or powder in an amount sufficient to function as a curing catalyst and to enable said adhesive to be cured in not greater than 5 minutes at 200° C.
Claim 7
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 8
Dependent Claim
15 words
A flexible adhesive formulation according to claim 5 comprising up to 90 wt. % silver.
Claim 9
Dependent Claim
18 words
A flexible adhesive formulation according to claim 6 wherein said filler comprises 60 to 90 wt. % silver.
Claim 10
Dependent Claim
69 words
A flexible adhesive formulation comprising the reaction produce of 6 to 24 wt. % modifier and 4 to 16 wt. % cyanate ester, 0.01 to 0.06 wt. %, metal-containing curing catalyst, 0.5 to 2 wt. % alkylphenol and up to 90 wt. % silver flake and/or powder, said modifier comprising a polyhydroxyl polymer compound within at least one of the following formula: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.m --OH and/or HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.m --OH.
Claim 11
Dependent Claim
69 words
A flexible adhesive formulation comprising the reaction produce of 6 to 24 wt. % modifier and 4 to 16 wt. % cyanate ester, 0.01 to 0.06 wt. %, metal-containing curing catalyst, 0.5 to 2 wt. % alkylphenol and up to 90 wt. % silver flake and/or powder, said modifier comprising a polyhydroxyl polymer compound within at least one of the following formula: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.m --OH and/or HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.m --OH.
Claim 12
Dependent Claim
42 words
A low viscosity flexible adhesive formulation comprising, in wt. %, 2-22% cyanate ester, 8-32% polyhydroxyl polymer compound, 0.01-0.06% metal-curing catalyst, up to 4% of an additive for thixotropic behavior control, 0.5 to 2% alkylphenol and up to 90% silver flake and/or powder.
Claim 13
Dependent Claim
42 words
A low viscosity flexible adhesive formulation comprising, in wt. %, 2-22% cyanate ester, 8-32% polyhydroxyl polymer compound, 0.01-0.06% metal-curing catalyst, up to 4% of an additive for thixotropic behavior control, 0.5 to 2% alkylphenol and up to 90% silver flake and/or powder.
Claim 14
Dependent Claim
30 words
A flexible adhesive formulation according to claim 9 wherein said modifier comprises a polyhydroxyl polymer within at least one of the following formulae: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.m --OH and/or HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.m --OH.
Claim 15
Dependent Claim
25 words
A flexible adhesive formulation according to claim 11 wherein said polyhydroxyl polymer compound is one from the group consisting of polyhydroxyl polyesters and polyhydroxyl polyethers.
Claim 16
Dependent Claim
29 words
A flexible adhesive formulation according to claim 10 wherein said polyhydroxyl polymer compound is within at least one of the following formulae: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.m --OH and/or HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.m --OH.
Claim 17
Dependent Claim
25 words
A flexible adhesive formulation according to claim 13 wherein said polyhydroxyl polymer compound is one from the group consisting of polyhydroxyl polyesters and polyhydroxyl polyethers.
Claim 18
Dependent Claim
17 words
A flexible adhesive formulation according to claim 10 wherein said additive comprises amorphous fume silica or clay.
References Cited (Backward Citations)
US4552690A
Cited
US5150195A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-10-04 | 1997-04-05 | 1997-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-04 | 2001-04-05 | 2001-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-04 | 2005-04-05 | 2005-10-05 | $7700.00 | Window Closed / Lapsed |