US3717523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of gas-tight sealing of semiconductor components
Assignee: Siemens AG
•
Filing: 1971-08-23
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Granted: 1973-02-20
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Expires: 1991-08-23
Abstract
Abstract For a gas-tight sealing of a semiconductor in a metal housing, the housing is preheated. An annular tablet of epoxide resin is then placed on the housing. While the housing slowly cools off, the tablet melts and seals the component by fusion.
Inventors
- 👤 H Dunsche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:39
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C66/00; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/5346; B29C66/61; B29C66/612; B29C66/70; B29C66/71; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49908; Y10T29/49936
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A method of gas-tight sealing of a semiconductor component in a cup-shaped metal housing which functions as an electric lead for a semiconductor system housed therein and which has an upper rim and an upper open portion covered by a cover of insulating material in pressure-contact with the housing, the semiconductor system having another electric lead passing through the cover of the housing, said method comprising heating the housing; and placing a substantially annular tablet of homogenous synthetic material on the upper rim of the housing whereby the tablet melts due to the preheating of the housing and fuses to fill the part of the housing which projects above the cover and seals the housing gas-tight.
Claim 2
Independent Claim
116 words
A method of gas-tight sealing of a semiconductor component in a cup-shaped metal housing which functions as an electric lead for a semiconductor system housed therein and which has an upper rim and an upper open portion covered by a cover of insulating material in pressure-contact with the housing, the semiconductor system having another electric lead passing through the cover of the housing, said method comprising heating the housing; and placing a substantially annular tablet of homogenous synthetic material on the upper rim of the housing whereby the tablet melts due to the preheating of the housing and fuses to fill the part of the housing which projects above the cover and seals the housing gas-tight.
Claim 3
Dependent Claim
18 words
A method of gas-tight sealing as claimed in claim 1, further comprising regulating the cooling of the housing.
Claim 4
Dependent Claim
17 words
A method of gas-tight sealing as claimed in claim 1, wherein the tablet comprises an epoxide resin.
Claim 5
Dependent Claim
38 words
A method of gas-tight sealing as claimed in claim 1, further comprising coating the upper area of the housing up to the cover with a varnish which improves the adherence of the melted synthetic material to the housing.
Claim 6
Dependent Claim
26 words
A method of gas-tight sealing as claimed in claim 1, further comprising hardening the melted synthetic material by heating the housing at 150*C for 1 hour.
References Cited (Backward Citations)
US3474302A
Cited
US3585715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |