# US 7,613,004 B2 · Heat sink with heat dissipating fins and method of manufacturing heat sink

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- Number: US 7,613,004 B2
- Document ID: US7613004B2
- Status: Granted
- Kind: B2
- Application number: 10/803,582
- Filed: 2004-03-17
- Published: 2004-09-30
- Granted: 2009-11-03
- Earliest claimed: 2003-03-31
- Assignees: Furukawa Electric Co., Ltd.
- Inventors: Chiyoshi Sasaki
- Web page: https://patentgrep.com/patent/US7613004B2

## CPC

- H10W 40/43: by flowing gases, e.g. forced air cooling
- F28F 3/02: Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence)
- H05K 7/2039: {characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00)}
- H05K 9/0026: {integrally formed from metal sheet}
- H10W 40/037: {Assembling together parts thereof}
- F28D 15/0266: {with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers (F28D15/043 takes precedence)}
- Y10T 29/4935: Heat exchanger or boiler making
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A heat sink comprising: a heat dissipating portion comprising a plurality of metal fins each having a heat receiving portion and a heat dissipating portion having elasticity; a fin fixing member to transfix said plurality of metal fins; a metal plate having a plurality of slits into which said respective heat dissipating portions are inserted and press-connected thereto with use of said elasticity; and a joining portion to join said metal plate and said heat dissipating portions which are inserted into said respective slits and fixed thereto.

## Claims

### Claim 1

A heat sink comprising:
a plurality of plate-like metal fins comprising a heat receiving portion and a heat dissipating elastic portion, said fins being linear or bent along a specific configuration;
a fin fixing member to transfix said plurality of metal fins;
a metal shield plate having a plurality of slits including linear and/or curved portions into which said respective fins are inserted along said slits, and press-connected to said fins by forming a first concave portion on a top side of said metal shield plate, a second concave portion on a bottom side of said metal shield plate, and an enlarged portion at the edge of said metal shield plate, wherein said first concave portion is aligned with said second concave portion at a given position on the metal shield plate; and
a deformed portion of said metal shield plate being fixed with said heat dissipating portions which are inserted into said respective slits and fixed thereto;
wherein each of said slits has a substantially same width corresponding to a thickness of said fins such that said slits are substantially filled by said fins.

### Claim 2 (depends on 1)

The heat sink as claimed in claim 1, wherein each of said slits extends toward respective one end portion of said metal shield plate in a longitudinal direction with remaining portions parallel with each other.

### Claim 3 (depends on 1)

The heat sink as claimed in claim 1, wherein each of said slits spreads toward respective both end portions of said metal shield plate in a longitudinal direction with center portions parallel with each other.

### Claim 4 (depends on 1)

The heat sink as claimed in claim 1, wherein each of said slits is parallel with each other in a longitudinal direction.

### Claim 5 (depends on 1)

The heat sink as claimed in claim 1, wherein each of said heat receiving port ion and said heat dissipating port ion of said fins constitutes a rectangular flat plate portion.

### Claim 6 (depends on 1)

The heat sink as claimed in claim 1, wherein said plurality of fins are placed in parallel in such a manner that respective heat receiving port ions of said fins form a single heat receiving face as a whole.

### Claim 7 (depends on 1)

The heat sink as claimed in claim 1, wherein said fin fixing member comprises a heat pipe.