EP0219692A2
Expired / Lapsed
EP
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Method for producing heat sink and heat sink thus produced
Assignee: Toshiba Corp
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Filing: 1986-09-17
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Granted: —
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Expires: 2006-09-17
Abstract
Abstract In a heat sink (1) for semiconductor elements and the like, a pipe (12) made of a heat-conductive material such as copper, aluminum and the like is bent at a middle portion (15) thereof and wound such that a forward flow passage (13) and a return flow passage (14) for a liquid coolant are both formed into a spiral shape with the bent portion held at the center of the spiral.
Inventors
- 👤 Hiroo Ikegame
- 👤 Shigeo Nonaka
- 👤 Takuro Ito
- 👤 Toshiaki Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/40; H10W40/47; F; F28; F28D; F28D7/00; F28D7/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A method for producing a heat sink comprising the steps of preparing a pipe made of a heat conductive material, bending said pipe at a middle portion thereof into a loop form in such a manner that two portions of the pipe provided on both sides of said middle portion extend side by side in one direction from said bent middle portion, and winding the entirety of thus bent pipe into a spiral shape with the bent middle portion held at the center, said both side portions extending side by side outwardly to be formed into a forward flow passage and a return flow passage of a liquid coolant circulating therethrough.
Claim 2
Independent Claim
111 words
A method for producing a heat sink comprising the steps of preparing a pipe made of a heat conductive material, bending said pipe at a middle portion thereof into a loop form in such a manner that two portions of the pipe provided on both sides of said middle portion extend side by side in one direction from said bent middle portion, and winding the entirety of thus bent pipe into a spiral shape with the bent middle portion held at the center, said both side portions extending side by side outwardly to be formed into a forward flow passage and a return flow passage of a liquid coolant circulating therethrough.
Claim 3
Dependent Claim
78 words
A heat sink for cooling stacked means consisting of a pipe made of a heat conductive material comprising a forward flow passage for a liquid coolant, a return flow passage for a liquid coolant, and a middle portion formed at substantially a central portion of said forward flow passage and said return flow passage, said middle portion being bent and wound so that said forward and return flow passages are formed into spirals starting from said middle portion.
Claim 4
Dependent Claim
78 words
A heat sink for cooling stacked means consisting of a pipe made of a heat conductive material comprising a forward flow passage for a liquid coolant, a return flow passage for a liquid coolant, and a middle portion formed at substantially a central portion of said forward flow passage and said return flow passage, said middle portion being bent and wound so that said forward and return flow passages are formed into spirals starting from said middle portion.
Claim 5
Dependent Claim
16 words
The heat sink according to claim 2 wherein said pipe is formed into a rectangular cross-section.
Claim 6
Dependent Claim
44 words
The heat sink according to claim 3 wherein said pipe having a rectangular cross-section is formed such that the thickness of walls of said pipe extending perpendicular to said pad is made larger than that of walls extending in parallel with the heat sink.
Claim 7
Dependent Claim
14 words
The heat sink according to claim 2 wherein said stacked means are semiconductor elements.
Claim 8
Dependent Claim
25 words
The heat sink according to claim 2 wherein said middle portion of said pipe is bent into a loop having a predetermined radius of curvature.
Claim 9
Dependent Claim
45 words
The heat sink according to claim 2 wherein a thermocouple element is provided in a void portion formed at the center of said heat sink, while lead wires connected to said element are extended to be inserted between said two side portions of said pipe.
Claim 10
Dependent Claim
34 words
The heat sink according to claim 2 wherein a bare metal wire is inserted between said two side portions of said pipe wound side by side for providing a terminal of said stacked means.
Claim 11
Dependent Claim
30 words
The heat sink assembly according to claim 2 wherein a pair of heat sinks are combined to be arranged side by side in a plane and connected together in series.
References Cited (Backward Citations)
No citation records indexed.
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