Patent US4483389A successfully refreshed from Google Patents.
US4483389A
Expired / Lapsed
US
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Telescoping thermal conduction element for semiconductor devices
Assignee: International Business Machines Corp
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Filing: 1982-03-10
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Granted: 1984-11-20
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Expires: 2002-03-10
Abstract
Abstract A telescoping heat exchange element for conducting heat in a semiconductor package from a device to a spaced heat sink having a first cup-shaped member, a second cup-shaped member positioned in telescoping slidable relation with the first member, and a means to provide a firm sliding contact between the first and second members.
Inventors
- 👤 Demetrios Balderes
- 👤 Joseph L. Horvath
- 👤 Lewis D. Lipschutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:12
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/70; H10W40/77; H10W40/774; H10W72/00; H10W72/071; H10W72/072; H10W72/07251; H10W72/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
127 words
A compliant telescoping heat exchange element for conducting heat in a semiconductor package from a semiconductor device to a spaced heat sink comprising a first cup-shaped member formed of heat conductive metal provided with a flat bottom surface adapted to be placed in contact with a surface of said semiconductor device, and an annular wall, a second cup-shaped member formed of heat conductive metal provided with a flat bottom surface adapted to be placed in contact with a surface of said heat sink, and an annular resilient slotted wall juxtaposed in telescoping slidable relation to said wall of said first cup-shaped member, means to provide a firm sliding contact between said wall of said first cup-shaped member and the resilient slotted wall of said second cup-shaped member.
Claim 2
Dependent Claim
127 words
A compliant telescoping heat exchange element for conducting heat in a semiconductor package from a semiconductor device to a spaced heat sink comprising a first cup-shaped member formed of heat conductive metal provided with a flat bottom surface adapted to be placed in contact with a surface of said semiconductor device, and an annular wall, a second cup-shaped member formed of heat conductive metal provided with a flat bottom surface adapted to be placed in contact with a surface of said heat sink, and an annular resilient slotted wall juxtaposed in telescoping slidable relation to said wall of said first cup-shaped member, means to provide a firm sliding contact between said wall of said first cup-shaped member and the resilient slotted wall of said second cup-shaped member.
Claim 3
Dependent Claim
45 words
The heat exchange element of claim 1 wherein said means to provide firm sliding contact is comprised of an outward flaring of said wall of said second cup-shaped member, said outwardly flared wall maintained under stress by the said wall of said first cup-shaped member.
Claim 4
Dependent Claim
39 words
The heat exchange element of claim 2 wherein said wall of said first cup-shaped member is substantially perpendicular to said bottom surface, whereby an area contact is obtained between said walls of said first and said second cup-shaped members.
Claim 5
Dependent Claim
19 words
The heat exchange element of claim 3 wherein said bottom surfaces of said cup-shaped members are rectangular or square.
Claim 6
Dependent Claim
17 words
The heat exchange element of claim 3 wherein said bottom surfaces of said cup-shaped members are circular.
Claim 7
Dependent Claim
28 words
The heat exchange element of claim 3 wherein said heat conductive metal of said cup-shaped members is selected from a metal consisting of copper, silver and alloys thereof.
Claim 8
Dependent Claim
89 words
The heat exchange element of claim 1 wherein said means to provide firm sliding contact between said walls of said first cup-shaped member and the wall of said second cup-shaped member is comprised of an outwardly flared arcuate end portion on said wall of said second cup-shaped member, an inwardly directed arcuate end portion on said wall of said first cup-shaped member, said flared arcuate end portion and said inwardly directed arcuate surface maintaining sliding contact and also providing a force to bias said cup-shaped members in extended relation.
Claim 9
Dependent Claim
17 words
The heat exchange element of claim 7 wherein said wall of said first cup-shaped member is slotted.
Claim 10
Dependent Claim
24 words
The heat exchange element of claim 8 wherein said bottom surfaces of said first and said second cup shaped members are square or rectangular.
Claim 11
Dependent Claim
21 words
The heat exchange element of claim 1 which further includes a spring means to bias said cup-shaped members in extensible relation.
Claim 12
Dependent Claim
26 words
The heat exchange element of claim 10 which further includes interlocking corner tabs on said walls of said cup-shaped members that prevents separation of said members.
Claim 13
Dependent Claim
57 words
The heat exchange element of claim 1 wherein the annular wall of said first cup-shaped member and the annular wall of said second cup-shaped member are straight, and the inside dimensions of said first cup-shaped member correspond to the outside dimensions of said second cup-shaped member, said members when in telescoping relationship have an area wall contact.
References Cited (Backward Citations)
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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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |