US5195299A
Expired / Lapsed
US
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Method of reducing moisture content of hermetic packages containing semiconductor devices
Assignee: Henkel Corp
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Filing: 1992-02-28
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Granted: 1993-03-23
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Expires: 2012-02-28
Abstract
Abstract Described is a method of reducing the moisture content in a hermetic package containing a semiconductor device by including a small amount of cyanate ester within the package.
Inventors
- 👤 My N. Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:03
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/40; H10W76/42; H10W76/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A method of reducing the water moisture content in a hermetic package containing a semiconductor device comprising incorporating within said package a small but effective amount of cyanate ester, reacting said cyanate ester with water to produce an imidocarbonic acid which molecularly rearranges upon formation into a stable carbamate molecular structure, exposing said package to an elevated temperature in the range of about 100° C. to 400° C. whereby said carbamate further reacts with water to produce carbon dioxide.
Claim 2
Independent Claim
79 words
A method of reducing the water moisture content in a hermetic package containing a semiconductor device comprising incorporating within said package a small but effective amount of cyanate ester, reacting said cyanate ester with water to produce an imidocarbonic acid which molecularly rearranges upon formation into a stable carbamate molecular structure, exposing said package to an elevated temperature in the range of about 100° C. to 400° C. whereby said carbamate further reacts with water to produce carbon dioxide.
Claim 3
Independent Claim
23 words
A method according to claim wherein said cyanate ester is incorporated within the package in the form of a cyanate ester-containing adhesive formulation.
Claim 4
Independent Claim
34 words
A method according to claim wherein said package includes a lid and said cyanate ester is incorporated within the package by applying the same to the backside of the package lid prior to sealing.
References Cited (Backward Citations)
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US3586926A
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US4280885A
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US4375498A
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US5150195A
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US5114003A
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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) | 1996-03-22 | 1996-09-21 | 1997-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-22 | 2000-09-21 | 2001-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-22 | 2004-09-21 | 2005-03-23 | $7700.00 | Window Closed / Lapsed |