US3629672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor device having an improved heat sink arrangement
Assignee: US Philips Corp
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Filing: 1970-02-25
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Granted: 1971-12-21
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Expires: 1990-02-25
Abstract
Abstract A semiconductor device comprising a metal cooling plate on which a semiconductor body is arranged, a number of conductors electrically connected to the semiconductor body and protruding from a synthetic resin envelope. The cooling plate is located on an outer side of the envelope, and opening being provided in the cooling plate and in the envelope for passing a fastening bolt, while the part of the opening located above the cooling plate is formed by a pressure-resistant metal ring.
Inventors
- 👤 Peter Wilhelmus Maria Va Water
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:53
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/10; H10W74/111; H10W74/114; H10W40/00; H10W40/70; H10W40/77; H10W40/778; H10W72/00; H10W72/50; H10W72/541; H10W72/5449; H10W90/00; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
18 words
A semiconductor device as claimed in claim 1, wherein the pressure resistant apertured member is an annular member.
Claim 2
Dependent Claim
37 words
A semiconductor device as claimed in claim 2, wherein the annular member and the cooling plate form separate metal parts, the annular member engaging the cooling plate by a head face and being fastened thereto by solder.
Claim 3
Dependent Claim
57 words
A semiconductor device as claimed in claim 3, wherein the cooling plate is provided around its aperture with a chamber having a bottom wall which is inclined, one end of the annular member fitting in said chamber and the head face located at said end bearing on the highest area of the bottom wall of the chamber.
Claim 4
Dependent Claim
28 words
A semiconductor device as claimed in claim 3, wherein the annular member is provided with a projecting ridge at least on its head face engaging the cooling plate.
Claim 5
Dependent Claim
31 words
A semiconductor device as claimed in claim 2, wherein the annular member is integral with the cooling plate and is obtained from the material of the cooling plate by plastic deformation.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |