US5213864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone encapsulant
Assignee: Nokia Bell Labs
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Filing: 1991-12-05
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Granted: 1993-05-25
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Expires: 2011-12-05
Abstract
Abstract An electronic device encapsulant comprises polydimethyldiphenylmethylphenylsiloxane in which the mole ratio of the sum of the methyl-phenyl and diphenyl groups to the dimethyl groups is in the range of ten to forty percent. The normal bi-functional hydride terminations are replaced with tri-functional or tetra-functional hydride terminations.
Inventors
- 👤 Ching-Ping Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:12
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C; C08; C08G; C08G77/00; C08G77/04; H10; H10W; H10W74/00; H10W74/40; H10W74/47; H10W74/476; H10W72/00; H10W72/50; H10W72/531; H10W72/536; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/239; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
An article of manufacture comprising: an electronic device encapsulated by a material including a silicone resin, wherein: the silicone resin is a siloxane containing dimethyl, diphenyl, and methyl-phenyl constituents, the mole ratio of the sum of the methyl-phenyl and diphenyl constituents to the dimethyl constituents being in the range of ten or forty percent; a first portion of the siloxane comprises molecules that are vinyl terminated, and a second portion of the siloxane comprises molecules that are hydride terminated; two to ten percent of the siloxane has hydride terminations selected form the group consisting of tri-functional hydride terminations and tetra-functional hydride terminations; and the resin contains a platinum catalyst to aid in cross-linking thereof.
Claim 2
Dependent Claim
114 words
An article of manufacture comprising: an electronic device encapsulated by a material including a silicone resin, wherein: the silicone resin is a siloxane containing dimethyl, diphenyl, and methyl-phenyl constituents, the mole ratio of the sum of the methyl-phenyl and diphenyl constituents to the dimethyl constituents being in the range of ten or forty percent; a first portion of the siloxane comprises molecules that are vinyl terminated, and a second portion of the siloxane comprises molecules that are hydride terminated; two to ten percent of the siloxane has hydride terminations selected form the group consisting of tri-functional hydride terminations and tetra-functional hydride terminations; and the resin contains a platinum catalyst to aid in cross-linking thereof.
Claim 3
Dependent Claim
20 words
The article of claim 1 wherein: the encapsulation is substantially undamaged by exposure to temperatures of less than -40° C.
Claim 4
Dependent Claim
78 words
An article of manufacture comprising: an electronic device encapsulated by a material including a silicone resin, wherein the silicone resin comprises a siloxane having the molecular from ##STR4## where R 1 -R 2 is a dimethyl constituent, R 3 -R 4 is a diphenyl constituent, R 5 -R 6 is a methyl-phenyl constituent, and the mole ratio of the sum of methyl-phenyl and diphenyl constituents to the dimethyl constituent is in the range of ten to forty percent.
Claim 5
Dependent Claim
78 words
An article of manufacture comprising: an electronic device encapsulated by a material including a silicone resin, wherein the silicone resin comprises a siloxane having the molecular from ##STR4## where R 1 -R 2 is a dimethyl constituent, R 3 -R 4 is a diphenyl constituent, R 5 -R 6 is a methyl-phenyl constituent, and the mole ratio of the sum of methyl-phenyl and diphenyl constituents to the dimethyl constituent is in the range of ten to forty percent.
Claim 6
Dependent Claim
22 words
The article of claim 3 wherein: the resin comprises a platinum catalyst, and the siloxane has vinyl and hydride functional molecular terminations.
Claim 7
Dependent Claim
14 words
The article of claim 4 wherein: that siloxane not hydride terminated is vinyl terminated.
Claim 8
Dependent Claim
29 words
The article of claim 5 wherein: two to ten percent of the siloxane has molecular terminations selected from the group consisting of tri-functional hydride terminations and tetra-functional hydride terminations.
Claim 9
Dependent Claim
18 words
An article of manufacture comprising an electronic device encapsulated by a silicone resin, wherein: the resin is polydimethyldiphenylmethylphenylsiloxane.
Claim 10
Dependent Claim
18 words
An article of manufacture comprising an electronic device encapsulated by a silicone resin, wherein: the resin is polydimethyldiphenylmethylphenylsiloxane.
Claim 11
Dependent Claim
38 words
The article of claim 7 wherein: two to ten percent of the resin molecules have molecular terminations selected from the group consisting of tri-functional and tetra-functional hydride terminations, and the remainder of the resin molecules have vinyl terminations.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |