Patent US5489637A successfully refreshed from Google Patents.
US5489637A
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US
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Low temperature flexible die attach adhesive and articles using same
Assignee: Henkel Corp
•
Filing: 1995-02-22
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Granted: 1996-02-06
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Expires: 2015-02-22
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
2026-11-07 05:43
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: 24
Claim 1
Independent Claim
90 words
A method of making a cyanate ester flexible which comprises reacting the cyanate ester with at least one flexibilizer having a glass transition temperature less than about 25° C., and comprising at least one member from the group consisting of compounds containing hydroxyl groups having a molecular weight of about 200 to 5000, compounds containing amine and compounds containing epoxide reactive functional groups, or mixtures thereof, to produce a formulation having a viscosity of about 5 to 50 poise and a radius of curvature of about 1 meter or more.
Claim 2
Independent Claim
90 words
A method of making a cyanate ester flexible which comprises reacting the cyanate ester with at least one flexibilizer having a glass transition temperature less than about 25° C., and comprising at least one member from the group consisting of compounds containing hydroxyl groups having a molecular weight of about 200 to 5000, compounds containing amine and compounds containing epoxide reactive functional groups, or mixtures thereof, to produce a formulation having a viscosity of about 5 to 50 poise and a radius of curvature of about 1 meter or more.
Claim 3
Independent Claim
92 words
A method of making a cyanate ester flexible which comprises reacting the cyanate ester with at least one flexibilizer having a glass transition temperature less than about 25° C. comprising at least one polyhydroxyl polymer compound having a molecular weight of about 200 to about 5000 from the group of polyhydroxyl polymer compounds within at least one of the following formulas: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.n OH, and HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.n --OH to produce a formulation having a viscosity of about 5 to 50 poise and a radius of curvature of about 1 meter or more.
Claim 4
Independent Claim
92 words
A method of making a cyanate ester flexible which comprises reacting the cyanate ester with at least one flexibilizer having a glass transition temperature less than about 25° C. comprising at least one polyhydroxyl polymer compound having a molecular weight of about 200 to about 5000 from the group of polyhydroxyl polymer compounds within at least one of the following formulas: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.n OH, and HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.n --OH to produce a formulation having a viscosity of about 5 to 50 poise and a radius of curvature of about 1 meter or more.
Claim 5
Dependent Claim
23 words
A method according to claim 2 wherein said polyhydroxyl polymer compound is one from the group consisting of polyhydroxyl polyesters and polyhydroxyl polyethers.
Claim 6
Dependent Claim
17 words
A method according to claim 2 wherein said cyanate ester further includes a metal containing co-curing catalyst.
Claim 7
Independent Claim
70 words
A method of rendering a cyanate ester flexible which comprises adding to the cyanate ester at least one polyhydroxyl polymer compound having a glass transition temperature less than about 25° C. and a molecular weight range of about 200 to about 5000 within at least one of the following formulas: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.n --OH and HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.m --OH or mixtures thereof, and grafting such polymer to the cyanate ester molecular structure.
Claim 8
Independent Claim
70 words
A method of rendering a cyanate ester flexible which comprises adding to the cyanate ester at least one polyhydroxyl polymer compound having a glass transition temperature less than about 25° C. and a molecular weight range of about 200 to about 5000 within at least one of the following formulas: HO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.n --OH and HO--(CH.sub.2).sub.m --O--C--O--R--C--O--(CH.sub.2).sub.m --OH or mixtures thereof, and grafting such polymer to the cyanate ester molecular structure.
Claim 9
Dependent Claim
18 words
A method according to claim 1 wherein said cyanate ester is reacted with an amine reactive functional group.
Claim 10
Dependent Claim
18 words
A method according to claim 1 wherein said cyanate ester is reacted with an epoxide reactive functional group.
Claim 11
Dependent Claim
19 words
A method according to claim 1 wherein said method comprises reacting cyanate ester with an amine reactive functional group.
Claim 12
Dependent Claim
19 words
A method according to claim 1 wherein said method comprises reacting cyanate ester with an epoxide reactive functional group.
Claim 13
Independent Claim
78 words
A method of making a cyanate ester flexible which comprises reacting 4 to 16 wt. % cyanate ester with 6 to 24 wt. % of at least one flexibilizer having a glass transition temperature less than about 25° C. containing one reactive functional group from the group of hydroxyl, amine and epoxide reactive functional groups, or mixtures thereof, wherein flexibilizers containing hydroxyl reactive functional groups have a molecular weight in the range of about 200 to about 5000.
Claim 14
Independent Claim
78 words
A method of making a cyanate ester flexible which comprises reacting 4 to 16 wt. % cyanate ester with 6 to 24 wt. % of at least one flexibilizer having a glass transition temperature less than about 25° C. containing one reactive functional group from the group of hydroxyl, amine and epoxide reactive functional groups, or mixtures thereof, wherein flexibilizers containing hydroxyl reactive functional groups have a molecular weight in the range of about 200 to about 5000.
Claim 15
Dependent Claim
32 words
A method according to claim 1 wherein said cyanate ester comprises an adhesive formulation suitable for bonding a semiconductor device to a substrate and further comprises a thermally and/or electrically conductive filler.
Claim 16
Dependent Claim
11 words
A method according to claim 2 wherein said filler comprises silver.
Claim 17
Dependent Claim
15 words
A method according to claim 2 wherein said adhesive formulation further comprises a curing catalyst.
Claim 18
Dependent Claim
14 words
A method according to claim 3 wherein said adhesive formulation further comprises an alkylphenol.
Claim 19
Dependent Claim
32 words
A method according to claim 1 wherein said cyanate ester comprises an adhesive formulation suitable for bonding a semiconductor device to a substrate and further comprises a thermally and/or electrically conductive filler.
Claim 20
Dependent Claim
11 words
A method according to claim 15 wherein said filler comprises silver.
Claim 21
Dependent Claim
15 words
A method according to claim 15 wherein said adhesive formulation further comprises a curing catalyst.
Claim 22
Dependent Claim
32 words
A method according to claim 5 wherein said cyanate ester comprises an adhesive formulation suitable for bonding a semiconductor device to a substrate further comprising adding a thermally and/or electrically conductive filler.
Claim 23
Dependent Claim
11 words
A method according to claim 18 wherein said filler comprises silver.
Claim 24
Dependent Claim
12 words
A method according to claim 18 further comprising adding a curing catalyst.
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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) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |