US3728584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor device mounting adapter
Assignee: Motors Liquidation Co
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Filing: 1971-06-21
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Granted: 1973-04-17
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Expires: 1991-06-21
Abstract
Abstract An adapter assembly is described for electrically insulating a stud mount semiconductor device from its supporting heat sink while maintaining good thermal communication between them. An externally and internally threaded boron nitride tubular adapter is threaded into a heat sink recess. The semiconductor device stud is threaded into the adapter.
Inventors
- 👤 R Kuhlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:48
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/611; H10W40/20; H10W40/231; H10W40/235
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
An assembly comprising a high power semiconductor diode package having a metal base member with a threaded mounting stud projecting from it in which said base member serves as an electrical connection for a semiconductor diode wafer in said package, an electrically conductive cooling member having a threaded recess, a generally tubular boron nitride element having internal and external thread means, said boron nitride element being threaded within said recess, an external shoulder on one end of said tubular element clamped against said cooling member, said package stud threaded within said boron nitride element from said one end, an electrically and thermally conductive washer around said stud and clamped between said package base and said one end of said boron nitride element, and a radially projecting tang on said washer for making a low resistance electrical connection to said package base.
Claim 2
Dependent Claim
141 words
An assembly comprising a high power semiconductor diode package having a metal base member with a threaded mounting stud projecting from it in which said base member serves as an electrical connection for a semiconductor diode wafer in said package, an electrically conductive cooling member having a threaded recess, a generally tubular boron nitride element having internal and external thread means, said boron nitride element being threaded within said recess, an external shoulder on one end of said tubular element clamped against said cooling member, said package stud threaded within said boron nitride element from said one end, an electrically and thermally conductive washer around said stud and clamped between said package base and said one end of said boron nitride element, and a radially projecting tang on said washer for making a low resistance electrical connection to said package base.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |