# US 8,542,488 B2 · Cooling apparatus for an IC

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- Number: US 8,542,488 B2
- Document ID: US8542488B2
- Status: Granted
- Kind: B2
- Application number: 13/146,884
- Filed: 2009-01-29
- Published: 2011-12-15
- Granted: 2013-09-24
- Earliest claimed: 2009-01-29
- Assignees: Hewlett-Packard Development Company, L.P.
- Applicants: Eric C. Peterson; Brandon Rubenstein
- Inventors: Eric C. Peterson; Brandon Rubenstein
- Web page: https://patentgrep.com/patent/US8542488B2

## CPC

- G06F 1/20: Cooling means
- H10W 40/47: by flowing liquids, e.g. forced water cooling
- H10W 40/611: {Bolts or screws}
- G06F 2200/201: Cooling arrangements using cooling fluid
- Y10T 29/49002: Electrical device making
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A cooling apparatus is disclosed. The cooling apparatus comprising a printed circuit (PC) board with an integrated circuit (IC) socket mounted onto the top side of the PC board. A mounting frame generally in the shape of a plate, with a first opening passing through the center of the plate, is mounted on the top side of the PC board with the IC socket located inside the first opening. A cold plate is attached to the mounting frame, the cold plate has an opening that passes through the cold plate. The opening in the cold plate is sized to allow an IC to be inserted into the IC socket through the opening. A fluid passageway is formed inside the cold plate. A fluid inlet port and a fluid outlet port are mounted on the cold plate and coupled to a first end and a second end of the fluid passageway, respectively. A heat spreader is removably attached to the top side of the cold plate wherein the bottom side of the heat spreader is configured to contact the top side of an IC when the IC is mounted in the IC socket.

## Claims

### Claim 1

A cooling apparatus, comprising:
a printed circuit (PC) board having a top side and a bottom side;
an integrated circuit (IC) socket mounted onto the top side of the PC board;
a mounting frame generally in the shape of a plate with a first opening passing through the center of the plate, the mounting frame mounted on the top side of the PC board with the IC socket located inside the first opening;
a cold plate attached to the mounting frame, the cold plate having a second opening that passes through the cold plate, the second opening aligned with the first opening in the mounting frame and sized to allow an IC to be inserted into the IC socket through the second opening;
a fluid passageway formed inside the cold plate;
a fluid inlet port and a fluid outlet port mounted on the cold plate and coupled to a first end and a second end of the fluid passageway, respectively;
a heat spreader removably attached to a top side of the cold plate wherein a bottom side of the heat spreader is configured to contact a top side of an IC when the IC is mounted in the IC socket.

### Claim 2 (depends on 1)

The cooling apparatus of claim 1 further comprising:
a bolster plate generally in the shape of a plate, the bolster plate mounted on the bottom side of the PC board underneath the mounting frame.

### Claim 3 (depends on 2)

The cooling apparatus of claim 2, wherein the bolster plate is attached to the mounting frame thereby holding the PC board between the bolster plate and the mounting frame.

### Claim 4 (depends on 1)

The cooling apparatus of claim 1, further comprising:
at least one spring coupled to the mounting frame and acting to force the cold plate towards the mounting frame.

### Claim 5 (depends on 4)

The cooling apparatus of claim 4, further comprising:
at least one shoulder screw attached to the mounting frame wherein the at least one shoulder screw passes through a third opening in the cold plate and wherein the at least one spring is mounted onto the at least one shoulder screw between a shoulder of the shoulder screw and the cold plate thereby forcing the cold plate towards the mounting frame.

### Claim 6 (depends on 1)

The cooling apparatus of claim 1, further comprising:
a fluid supply line attached to the fluid inlet port;
a fluid return line attached to the fluid outlet port;
the fluid supply line and fluid return line attached to a fluid conditioning system that supplies cooling fluid to the fluid supply line and receives heated fluid from the fluid return line.

### Claim 7 (depends on 1)

The cooling apparatus of claim 1, further comprising:
a thermal material located on the bottom side of the heat spreader and configured to contact a top side of an IC when the IC is mounted in the IC socket.

### Claim 8 (depends on 1)

The cooling apparatus of claim 1, further comprising:
an IC mounted in the IC socket.

### Claim 9 (depends on 1)

The cooling apparatus of claim 1, wherein the PC board is mounted in a server.