US6057402A
Expired / Lapsed
US
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Long and short-chain cycloaliphatic epoxy resins with cyanate ester
Assignee: Henkel IP and Holding GmbH
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Filing: 1998-08-12
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Granted: 2000-05-02
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Expires: 2018-08-12
Abstract
Abstract Compositions having high moisture resistance and flexibility comprise an organic component and a filler. The organic component comprises a long-chain cycloaliphatic epoxy resin, a short-chain cycloaliphatic epoxy resin, a cyanate ester, and a Lewis acid catalyst. Preferably the organic component further comprises a Bronsted acid co-catalyst and/or a flexibilizing modifier. The compositions are useful in various semiconductor applications, including as die attach adhesives, underfills, encapsulants, via fills, prepreg binders, polymer solder masks and polymer bumps on flip chip or BGA assemblies.
Inventors
- 👤 Xiao-Qi Zhou
- 👤 Henry Wevick
- 👤 Nancy E. Iwamoto
- 👤 Shao Wei Li
- 👤 Alan Grieve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:27
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/40; H10W74/47; C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24; C08G59/32; C08G59/38; C08G59/40; C08G59/4007; C08G59/4014; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655; C08L; C08L63/00; G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; H10W72/00; H10W72/20; H10W74/01; H10W74/012; H10W74/10; H10W74/15
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
45 words
A composition comprising an organic component and a filler, wherein the organic component comprises: at least one long-chain cycloaliphatic epoxy resin, at least one short-chain cycloaliphatic epoxy resin, at least one cyanate ester; at least one Lewis acid catalyst; and at least one flexibilizing modifier.
Claim 2
Dependent Claim
45 words
A composition comprising an organic component and a filler, wherein the organic component comprises: at least one long-chain cycloaliphatic epoxy resin, at least one short-chain cycloaliphatic epoxy resin, at least one cyanate ester; at least one Lewis acid catalyst; and at least one flexibilizing modifier.
Claim 3
Dependent Claim
29 words
A composition according to claim 1, wherein said at least one flexibilizing modifier is selected from the group consisting of functionalized flexible long-chain epoxies and long-chain functionalized double-bonded compounds.
Claim 4
Dependent Claim
29 words
A composition according to claim 1, wherein said at least one flexibilizing modifier is selected from the group consisting of epoxy-terminated siloxanes, epoxidized polybutadiene, epoxidized oils, acrylates, and rubbers.
Claim 5
Dependent Claim
29 words
A composition according to claim 1, wherein said at least one flexibilizing modifier is selected from the group consisting of epoxidized methyl linseedate, urethane acrylates, and methacrylated polybutadiene acrylonitrile.
Claim 6
Dependent Claim
39 words
A composition according to claim 1, wherein said at least one flexibilizing modifier is present in the composition in an amount ranging from about 5% to about 25% by weight based on the total weight of the organic component.
Claim 7
Dependent Claim
39 words
A composition according to claim 1, wherein said at least one flexibilizing modifier is present in the composition in an amount ranging from about 16% to about 20% by weight based on the total weight of the organic component.
Claim 8
Dependent Claim
51 words
A composition comprising an organic component and a filler, wherein the organic component comprises: at least one long-chain cycloaliphatic epoxy resin, at least one short-chain cycloaliphatic epoxy resin, at least one cyanate ester, at least one Lewis acid catalyst, at least one Bronsted acid co-catalyst, and at least one flexibilizing modifier.
Claim 9
Dependent Claim
51 words
A composition comprising an organic component and a filler, wherein the organic component comprises: at least one long-chain cycloaliphatic epoxy resin, at least one short-chain cycloaliphatic epoxy resin, at least one cyanate ester, at least one Lewis acid catalyst, at least one Bronsted acid co-catalyst, and at least one flexibilizing modifier.
Claim 10
Dependent Claim
20 words
A composition according to claim 7, wherein said at least one Bronsted acid co-catalyst is a weak Bronsted acid catalyst.
Claim 11
Dependent Claim
27 words
A composition according to claim 7, wherein said at least one Bronsted acid co-catalyst is selected from the group consisting of phenol-based molecules, diketonates, diesters, and ketoesters.
Claim 12
Dependent Claim
41 words
A composition according to claim 7, wherein said at least one Bronsted acid co-catalyst is selected from the group consisting of catechol, dibenzoylmethane, 4-nitrosophenol, tert-butylphenol, 2,3-dimethoxyphenol, 2,6-dimethyl-4-nitrophenol, bisphenolA, 4-(4-nitrophenylazo)catechol, 4-methylcatechol, ethoxylated nonylphenol acrylate, nonylphenol, benzoylacetone, dibenzoylmethane, ethyl malonate, and ethyl acetoacetate.
Claim 13
Dependent Claim
40 words
A composition according to claim 7, wherein said at least one Bronsted acid co-catalyst is present in the composition in an amount ranging from about 0.3% to about 0.8% by weight based on the total weight of the organic component.
Claim 14
Dependent Claim
29 words
A composition according to claim 7, wherein said at least one flexibilizing modifier is selected from the group consisting of functionalized flexible long-chain epoxies and long-chain functionalized double-bonded compounds.
Claim 15
Dependent Claim
29 words
A composition according to claim 7, wherein said at least one flexibilizing modifier is selected from the group consisting of epoxy-terminated siloxanes, epoxidized polybutadiene, epoxidized oils, acrylates, and rubbers.
Claim 16
Dependent Claim
29 words
A composition according to claim 7, wherein said at least one flexibilizing modifier is selected from the group consisting of epoxidized methyl linseedate, urethane acrylates, and methacrylated polybutadiene acrylonitrile.
Claim 17
Dependent Claim
39 words
A composition according to claim 7, wherein said at least one flexibilizing modifier is present in the composition in an amount ranging from about 5% to about 25% by weight based on the total weight of the organic component.
Claim 18
Dependent Claim
39 words
A composition according to claim 7, wherein said at least one flexibilizing modifier is present in the composition in an amount ranging from about 16% to about 20% by weight based on the total weight of the organic component.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2003-05-02 | 2003-11-01 | 2004-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-02 | 2007-11-01 | 2008-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-02 | 2011-11-01 | 2012-05-02 | $7700.00 | Window Closed / Lapsed |