US4028723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling device for heat generation member
Assignee: Mitsubishi Electric Corp
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Filing: 1975-02-24
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Granted: 1977-06-07
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Expires: 1995-02-24
Abstract
Abstract Within a refrigerant two planar semiconductor elements are sandwiched between two cooling member while another cooling member is interposed between the elements. The interposed cooling member includes three through holes vertically running through it and each of the outermost cooling members includes three grooves vertically extending throughout that surface remote from the semiconductor elements. An axial hole may be provided on each of the cooling members.
Inventors
- 👤 Yoshiro Shikano
- 👤 Yasuhiro Ueoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:06
CPC Classifications
H; H10; H10W; H10W90/00; H10W40/00; H10W40/70; H10W40/73
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
A cooling device comprising: a plurality of planar semiconductor elements having a pair of flat surfaces on opposite sides thereof; a plurality of planar cooling members having a pair of flat surfaces on opposite sides therof, each planar cooling member positioned between and abutting the flat surfaces of a pair of said semiconductor elements, and each planar cooling member having a plurality of parallel, vertical first passageways therein between the circumference thereof and at least one second passageway therethrough between said two opposite flat surfaces transverse to and through at least one of said first passagewys and opening against the surface of at least one of said semiconductors abutting said cooling member; and an electrically insulative refrigerant liquid completely surrounding said semiconductor elements and said cooling members and filling said first and second passageways in said cooling member, said refrigerant liquid having a boiling point less than the rated temperature of said semiconductor element.
Claim 2
Dependent Claim
154 words
A cooling device comprising: a plurality of planar semiconductor elements having a pair of flat surfaces on opposite sides thereof; a plurality of planar cooling members having a pair of flat surfaces on opposite sides therof, each planar cooling member positioned between and abutting the flat surfaces of a pair of said semiconductor elements, and each planar cooling member having a plurality of parallel, vertical first passageways therein between the circumference thereof and at least one second passageway therethrough between said two opposite flat surfaces transverse to and through at least one of said first passagewys and opening against the surface of at least one of said semiconductors abutting said cooling member; and an electrically insulative refrigerant liquid completely surrounding said semiconductor elements and said cooling members and filling said first and second passageways in said cooling member, said refrigerant liquid having a boiling point less than the rated temperature of said semiconductor element.
Claim 3
Dependent Claim
27 words
A cooling device as claimed in claim 1 wherein said first passageways are vertical, parallel holes passing through the perimeter of and completely through said cooling member.
Claim 4
Dependent Claim
33 words
A cooling device as claimed in claim 1 wherein said first passageways are a plurality of vertical, parallel grooves running completely across at least one of said flat surfaces of said cooling member.
Claim 5
Dependent Claim
29 words
A cooling device as claimed in claim 1 wherein said first passageways are a plurality of parallel, vertical grooves running completely across both flat surfaces of said cooling member.
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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |