US4576224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond heatsink assemblies
Assignee: Plessey Overseas Ltd
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Filing: 1984-09-17
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Granted: 1986-03-18
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Expires: 2004-09-17
Abstract
Abstract A diamond heatsink for semiconductor devices comprises a stud into which the diamond is pressed. The stud is held by friction in the end of a hollow split cylindrical holder. The holder is clamped in a base or wall member by a locknut which is screwed into the base or wall member and urges two half-conical collets into contact with the holder. The holder is also mounted by a screw thread in the locknut to allow the position of the semiconductor device to be adjusted.
Inventors
- 👤 Ralph M. Eaton
- 👤 Michael W. Geen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/611; H10W40/20; H10W40/25; H10W40/254; H10W40/231; H10W40/233
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
189 words
A diamond heatsink assembly comprising: (a) a mounting member including an outer surface in which is positioned a diamond; (b) a holder member for holding said mounting member; (c) a clamping member for securing said mouning member and said holder member, said clamping member being of split frusto-conical shape and including a base surface and a bore in which said mounting member and said holder member are inserted; (d) a locking member; and (E) a base member including (i) a recess of corresponding shape to that of said clamping member and (ii) first and second openings on respective sides of said recess, said first opening receiving said mounting member and said second opening receiving said locking member, said locking member axially movably positioned within said base member and adjacent said base surface of said clamping member for forcing said clamping member against said recess to clamp said clamping member against said holder member and to clamp said holder member against said mounting member to prevent rotation of said mounting member and to retain said mounting member with its outer surface substantially planar with a surface of said base member.
Claim 2
Dependent Claim
189 words
A diamond heatsink assembly comprising: (a) a mounting member including an outer surface in which is positioned a diamond; (b) a holder member for holding said mounting member; (c) a clamping member for securing said mouning member and said holder member, said clamping member being of split frusto-conical shape and including a base surface and a bore in which said mounting member and said holder member are inserted; (d) a locking member; and (E) a base member including (i) a recess of corresponding shape to that of said clamping member and (ii) first and second openings on respective sides of said recess, said first opening receiving said mounting member and said second opening receiving said locking member, said locking member axially movably positioned within said base member and adjacent said base surface of said clamping member for forcing said clamping member against said recess to clamp said clamping member against said holder member and to clamp said holder member against said mounting member to prevent rotation of said mounting member and to retain said mounting member with its outer surface substantially planar with a surface of said base member.
Claim 3
Dependent Claim
15 words
A diamond heatsink assembly as claimed in claim 10 wherein the mounting member is cylindrical.
Claim 4
Dependent Claim
85 words
A diamond heatsink assembly as claimed in claim 1 wherein the holder member has first and second ends and comprises an elongate hollow cylinder having a plurality of slots in a wall thereof, said slots extending longitudinally from an outer end to an inner end of said cylinder to a position intermediate the ends of the holder member to form a split end and provide additional resilience in the wall of the cylinder at the outer end thereof in which said mounting member is held.
Claim 5
Dependent Claim
70 words
A diamond heatsink assembly as claimed in claim 3 wherein the holder member includes a threaded member to be threaded onto a correponding member on a base which communicates with a conical hole which receives the heatsink assembly, thus tightening of the threaded member urges the clamping member into contact with the sides of the conical hole to clamp the split end of the holder member around the mounting member.
Claim 6
Dependent Claim
50 words
A diamond heatsink assembly as claimed in claim 4 wherein the holder member is threadedly mounted in the locking member; the holder member, the mounting member and an electronic device mounted on the mounting member can be rotated relative to the base member by loosening and tightening the holder member.
Claim 7
Dependent Claim
19 words
A diamond heatsink assembly as claimed in claim 1 wherein the clamping member includes a longitudinally split frusto-conical member.
Claim 8
Dependent Claim
20 words
A diamond heatsink assembly as claimed in claim 1 wherein the clamping member includes a plurality of part frusto-conical collets.
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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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |