# US 5,699,853 A · Combined heat sink and sink plate

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- Number: US 5,699,853 A
- Document ID: US5699853A
- Status: Granted
- Kind: A
- Application number: 08/697,806
- Filed: 1996-08-30
- Granted: 1997-12-23
- Earliest claimed: 1996-08-30
- Assignees: International Business Machines Corporation
- Inventors: Gary Franklin Goth; Randall Gail Kemink; John Joseph Loparco; Roger Ray Schmidt
- Web page: https://patentgrep.com/patent/US5699853A

## CPC

- H10W 40/73: for cooling by change of state
- F28D 15/0275: {Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores}
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- 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)

## Abstract

A heat sink with fins that extend between first and second conductive plates is cooperatively combined with one or more heat pipes which act to directly transfer heat to an otherwise relatively inefficiently used portion of the cooling fins.

## Claims

### Claim 1

A heat sink comprising:
a first thermally conductive plate;
a second thermally conductive plate disposed substantially parallel to said first plate;
an array of substantially parallel thermally conductive fins extending between said first and second plates, said fins being in direct thermal contact with said first and second plates; and
at least one heat pipe thermally connecting said first and second plates.

### Claim 2 (depends on 1)

The heat sink of claim 1 in which said heat pipe is U-shaped.

### Claim 3 (depends on 1)

The heat sink of claim 1 in which said at least one heat pipe is inserted into channels in said first and second thermally conductive plates.

### Claim 4 (depends on 1)

The heat sink of claim 1 in which said first thermally conductive plate comprises a material selected from the group consisting of copper and aluminum.

### Claim 5 (depends on 1)

The heat sink of claim 1 in which said second thermally conductive plate comprises a material selected from the group consisting of copper and aluminum.

### Claim 6 (depends on 1)

The heat sink of claim 1 in which there are four heat pipes present.

### Claim 7 (depends on 1)

The heat sink of claim 1 in which said at least one heat pipe is U-shaped and lies substantially in a plane parallel to said fins.

### Claim 8 (depends on 1)

The heat sink of claim 1 in which said at least one heat pipe is U-shaped and lies in a plane substantially perpendicular to said fins.

### Claim 9 (depends on 1)

The heat sink of claim 1 further including additional fins disposed on said at least one heat pipe.

### Claim 10 (depends on 1)

The heat sink of claim 1 in which said at least one heat pipe extends from said first plate to said second plate through said fin array.