Patent US3935931A successfully refreshed from Google Patents.
Patent US4472483A successfully refreshed from Google Patents.
US4472483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically insulating sheet with good heat conductivity
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1982-03-17
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Granted: 1984-09-18
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Expires: 2002-03-17
Abstract
Abstract The invention provides an electrically insulating spacer sheet of a silicone rubber used as sandwiched between a heat-generating electric or electronic device or unit, e.g. power transistor, and a heat radiator capable of dissipating the heat with improved heat conductivity. Different from conventional ones, the inventive spacer sheet has coating layers on both surfaces formed of a non-volatile flowable or deformable silicone material so that the condition of adhesive contacting can be greatly improved and the resistance against thermal flow across the spacer sheet can be decreased very much.
Inventors
- 👤 Noboru Shimamoto
- 👤 Tokio Sekiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:10
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
59 words
An electrically insulating spacer sheet for heat conduction which comprises a sheet of a cured silicone rubber and a coating layer on each of the surfaces thereof formed of a non-volatile silicone material flowable under external force selected from the group consisting of silicone fluids having a boiling point not lower than 200° C., silicone greases and gum-like silicones.
Claim 2
Dependent Claim
59 words
An electrically insulating spacer sheet for heat conduction which comprises a sheet of a cured silicone rubber and a coating layer on each of the surfaces thereof formed of a non-volatile silicone material flowable under external force selected from the group consisting of silicone fluids having a boiling point not lower than 200° C., silicone greases and gum-like silicones.
Claim 3
Dependent Claim
28 words
The electrically insulating spacer sheet for heat conduction as claimed in claim 1 wherein the coating layer has a thickness in the range from 0.1 to 100 μm.
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) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |