Patent US5353193A successfully refreshed from Google Patents.
US5353193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High power dissipating packages with matched heatspreader heatsink assemblies
Assignee: LSI Corp
•
Filing: 1993-02-26
•
Granted: 1994-10-04
•
Expires: 2013-02-26
Abstract
Abstract A removable heatsink assembly comprised of a heatsink unit and a heatspreader is provided. The heatsink unit has at least one fin and a coupling collar for radiating heat away from a packaged electronic device. The heatspreader includes a platform attached to an inner collar in thermal contact with the packaged electronic device. The platform has one or more tabs suitable for mating with one or more flanges located on the coupling collar of the heatsink unit. Coupling grooves within the flanges engage the platform of the heatspreader when the flanges are mated with the heatspreader tabs and the heatsink is turned. The heatsink can therefore be quickly and conveniently attached to or removed from the heatspreader. The present invention thus permits a wide variety of different heatsinks to be interchangeably used with a single heatspreader attached to an electronic device package.
Inventors
- 👤 Chok J. Chia
- 👤 Manian Alagaratnam
- 👤 Qwai H. Low
- 👤 Seng-Sooi Lim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:57
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; F; F02; F02F; F02F7/00; H10W40/20; H10W40/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
117 words
A heatsink assembly for radiating heat away from a packaged electronic device comprising: a removable heatsink unit, said unit having at least one fin and a coupling collar; a heatspreader having a platform, at least one tab and an inner collar, said platform being attached to said inner collar and said tab being disposed along the periphery of said platform, said heatspreader adapted to be in thermal contact with the packaged electronic device and adapted to receive a portion of said coupling collar of said heatsink unit within said tab such that when said heatsink unit is turned, said coupling collar removably engages said platform of said heatspreader, thereby removably coupling said heatsink unit to said heatspreader.
Claim 2
Dependent Claim
117 words
A heatsink assembly for radiating heat away from a packaged electronic device comprising: a removable heatsink unit, said unit having at least one fin and a coupling collar; a heatspreader having a platform, at least one tab and an inner collar, said platform being attached to said inner collar and said tab being disposed along the periphery of said platform, said heatspreader adapted to be in thermal contact with the packaged electronic device and adapted to receive a portion of said coupling collar of said heatsink unit within said tab such that when said heatsink unit is turned, said coupling collar removably engages said platform of said heatspreader, thereby removably coupling said heatsink unit to said heatspreader.
Claim 3
Dependent Claim
27 words
The heatsink assembly of claim 1 wherein said portion of said coupling collar of said heatsink unit comprises at least one flange having an inner coupling groove.
Claim 4
Dependent Claim
36 words
The heatsink assembly of claim 2 wherein said flange engages said tab and said inner coupling groove within said flange tightens about said platform as said heatsink unit is turned while said flange engages said tab.
Claim 5
Dependent Claim
43 words
The heatsink assembly of claim 2 wherein said coupling collar includes two of said flanges, each of said flanges having an inner coupling groove, and further wherein said heatspreader includes two tabs, each of said tabs adapted for receiving one of said flanges.
Claim 6
Dependent Claim
31 words
The heatsink assembly of claim 4 wherein said two flanges are arranged on opposite sides of said coupling collar and said two tabs are arranged on opposite sides of said platform.
Claim 7
Dependent Claim
18 words
The heatsink assembly of claim 1 wherein said coupling collar of said heatsink unit is comprised of copper.
Claim 8
Dependent Claim
17 words
The heatsink assembly of claim 1 wherein said inner collar of said heatspreader is comprised of copper.
Claim 9
Dependent Claim
17 words
The heatsink assembly of claim 1 wherein said fin of said heatsink unit is comprised of aluminum.
Claim 10
Dependent Claim
24 words
The heatsink assembly of claim 1 wherein said coupling collar of said heatsink unit and said platform of said heatspreader are circular in shape.
Claim 11
Dependent Claim
15 words
The heatsink assembly of claim 2 wherein said inner coupling groove has a ramp-like surface.
Claim 12
Dependent Claim
20 words
The heatsink assembly of claim 1 wherein a portion of said heatspreader is adapted to be disposed with the package.
Claim 13
Dependent Claim
78 words
A heatsink assembly comprising: a removable heatsink unit, said unit having a coupling collar; a heatspreader having a platform and at least one tab, said tab being disposed along the periphery of said platform, and adapted to receive a portion of said coupling collar of said heatsink unit within said tab such that when said heatsink unit is turned, said coupling collar removably engages said platform of said heatspreader, thereby removably coupling said heatsink unit to said heatspreader.
Claim 14
Dependent Claim
78 words
A heatsink assembly comprising: a removable heatsink unit, said unit having a coupling collar; a heatspreader having a platform and at least one tab, said tab being disposed along the periphery of said platform, and adapted to receive a portion of said coupling collar of said heatsink unit within said tab such that when said heatsink unit is turned, said coupling collar removably engages said platform of said heatspreader, thereby removably coupling said heatsink unit to said heatspreader.
Claim 15
Dependent Claim
27 words
The heatsink assembly of claim 12 wherein said portion of said coupling collar of said heatsink unit comprises at least one flange having an inner coupling groove.
Claim 16
Dependent Claim
36 words
The heatsink assembly of claim 13 wherein said flange engages said tab and said inner coupling groove within said flange tightens about said platform as said heatsink unit is turned while said flange engages said tab.
Claim 17
Dependent Claim
43 words
The heatsink assembly of claim 13 wherein said coupling collar includes two of said flanges, each of said flanges having an inner coupling groove, and further wherein said heatspreader includes two tabs, each of said tabs adapted for receiving one of said flanges.
Claim 18
Dependent Claim
18 words
The heatsink assembly of claim 12 wherein said coupling collar of said heatsink unit is comprised of copper.
Claim 19
Dependent Claim
16 words
The heatsink assembly of claim 12 wherein said platform of said heatspreader is comprised of copper.
Claim 20
Dependent Claim
24 words
The heatsink assembly of claim 12 wherein said coupling collar of said heatsink unit and said platform of said heatspreader are circular in shape.
References Cited (Backward Citations)
US3836825A
Cited
US4345267A
Cited
US4621304A
Cited
US4626960A
Cited
US4729426A
Cited
US4712159A
Cited
US4716494A
Cited
US4897764A
Cited
US5227663A
Cited
US4978638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |