US3828848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel diamond particle particularly for use in heat sinks
Assignee: De Beers Industrial Diamond Division Pty Ltd
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Filing: 1972-07-21
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Granted: 1974-08-13
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Expires: 1992-07-21
Abstract
Abstract The invention provides a rounded diamond particle, which is preferably of the Type IIa, truncated by a single planar surface or by a planar surface at each of opposed poles. These particles find particular use in heat sinks for electronic devices, the heat sink consisting of a body of a metal of good heat conductivity such as copper and a truncated diamond particle in thermal contact with the body such that a planar surface is presented away from the body and thus able to make thermal contact with an electronic device.
Inventors
- 👤 Joseph Lambert Maria Custers
- 👤 Frederick Anton Raal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:12
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/02; H; H10; H10W; H10W40/00; H10W40/20; H10W40/25; H10W40/254
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
46 words
A heat sink comprising a body of a metal of good heat conductivity, and a spheroidal diamond particle truncated by a single planar surface and in thermal contact with the body such that the planar surface is adapted to make thermal contact with an electronic device.
Claim 2
Dependent Claim
46 words
A heat sink comprising a body of a metal of good heat conductivity, and a spheroidal diamond particle truncated by a single planar surface and in thermal contact with the body such that the planar surface is adapted to make thermal contact with an electronic device.
Claim 3
Dependent Claim
15 words
A heat sink according to claim 1 wherein the diamond is of the Type IIa.
Claim 4
Dependent Claim
12 words
A heat sink according to claim 1 wherein the surface is polished.
Claim 5
Dependent Claim
53 words
A heat sink comprising a body of a metal of good heat conductivity and a spheroidal diamond particle of the Type IIa truncated by a single planar, polished surface, the particle being located in a recess in the surface of the body such that the planar surface is presented away from the body.
Claim 6
Dependent Claim
53 words
A heat sink comprising a body of a metal of good heat conductivity and a spheroidal diamond particle of the Type IIa truncated by a single planar, polished surface, the particle being located in a recess in the surface of the body such that the planar surface is presented away from the body.
Claim 7
Dependent Claim
15 words
A heat sink according to claim 4 wherein the metal of the body is copper.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |