US4768581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system for semiconductor modules
Assignee: International Business Machines Corp
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Filing: 1987-04-06
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Granted: 1988-09-06
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Expires: 2007-04-06
Abstract
Abstract A cooling structure for a semiconductor package wherein the cooling fluid is circulated over the cooling fins over short distances. The fluid flow is separated into multiple flow streams, passed over the fins for short distances and exhausted.
Inventors
- 👤 Charles A. Gotwald
- 👤 Sevgin Oktay
- 👤 Ajay Sharma
- 👤 Vijay Sonnad
- 👤 Arthur R. Zingher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:44
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/40; H10W40/43; Y; Y10; Y10S; Y10S165/00; Y10S165/903
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
124 words
An improved system for cooling electronic elements comprising a base element adapted to receive heat from electronic elements, a plurality of spaced fins mounted on said base element, at least one elongated duct means mounted over said spaced fins, said duct means provided with a pair of flat bottom wall members in engagement with the upper ends of said fins, and an upwardly bulged top wall member joined to the outer edges of said pair of bottom wall members, said duct means having at least one open end, a plenum mounted on said base member for conveying cooling fluid through said system, said system in operation adapted to pass cooling fluid through said plenum, then through said fins and then through said duct means.
Claim 2
Dependent Claim
124 words
An improved system for cooling electronic elements comprising a base element adapted to receive heat from electronic elements, a plurality of spaced fins mounted on said base element, at least one elongated duct means mounted over said spaced fins, said duct means provided with a pair of flat bottom wall members in engagement with the upper ends of said fins, and an upwardly bulged top wall member joined to the outer edges of said pair of bottom wall members, said duct means having at least one open end, a plenum mounted on said base member for conveying cooling fluid through said system, said system in operation adapted to pass cooling fluid through said plenum, then through said fins and then through said duct means.
Claim 3
Dependent Claim
16 words
The system of claim 1 wherein said base element and said fins are formed of Cu.
Claim 4
Dependent Claim
12 words
The system of claim 2 wherein base element is a laminated structure.
Claim 5
Dependent Claim
34 words
The system of claim 3 wherein a plurality of unitary flat elements form both the base element and the fins, and said base element further including flat members sandwiched between said unitary flat elements.
Claim 6
Dependent Claim
20 words
The system of claim 4 which further includes flat spacer elements sandwiched between the upper ends of said flat members.
Claim 7
Dependent Claim
25 words
The system of claim 5 wherein said spacer members and the upper ends of said flat members form said wall members of said duct means.
Claim 8
Dependent Claim
16 words
The system of claim 6 wherein said top wall member has an arcuate cross sectional configuration.
Claim 9
Dependent Claim
21 words
The system of claim 1 wherein said fins are comprised of at least one pair of rows of spaced parallel fins.
Claim 10
Dependent Claim
22 words
The system of claim 1 wherein said fins are multiple pairs of rows of spaced parallel fins mounted on said base member.
Claim 11
Dependent Claim
26 words
The system of claim 1 wherein the ratio of the distance between said fins over the fin thickness is in the range of 0.5 to 4.
Claim 12
Dependent Claim
18 words
The system of claim 10 wherein the thickness of said fins is of the order of 0.25 mm.
Claim 13
Dependent Claim
19 words
The system of claim 1 wherein said duct means is made of a material with a low heat conductivity.
Claim 14
Dependent Claim
18 words
The system of claim 1 wherein said duct means is open at both ends for exhausting cooling fluid.
Claim 15
Dependent Claim
23 words
The system of claim 13 wherein a flow splitting structure is provided in said duct means to direct cooling fluid in opposite directions.
Claim 16
Dependent Claim
33 words
The system of claim 8 wherein a spacing is provided between the ends of said fins and the walls of said plenum, said spacing being in the range of 2 to 5 mm.
Claim 17
Dependent Claim
27 words
The system of claim 15 wherein the spacing of the ends of said fins from the walls of said plenum is on the order of 3 mm.
Claim 18
Dependent Claim
40 words
The system of claim 1 which further includes apertures in the bottom side of said base member, and pistons movably mounted in said aperture for contacting electronic elements, said pistons conducting heat from said electronic elements to said base member.
Claim 19
Independent Claim
100 words
A system for cooling electronic elements comprising: a base element adapted to receive heat from electronic elements, a plurality of fins mounted on said base element, a blower to direct cooling gas downwardly toward said base element, a means to funnel said cooling gas to said fins, a duct means distinct from said funnel means over said fins to convey said cooling gas away from said fins, said system in operation adapted to move cooling gas through said funnel means, then inwardly between said fins, and then exhaust said gas upwardly and transverse to said fins through said duct means.
Claim 20
Independent Claim
100 words
A system for cooling electronic elements comprising: a base element adapted to receive heat from electronic elements, a plurality of fins mounted on said base element, a blower to direct cooling gas downwardly toward said base element, a means to funnel said cooling gas to said fins, a duct means distinct from said funnel means over said fins to convey said cooling gas away from said fins, said system in operation adapted to move cooling gas through said funnel means, then inwardly between said fins, and then exhaust said gas upwardly and transverse to said fins through said duct means.
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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) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |