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Micro heat sink of forced oscillation type for high density heat source like CPU

IP.com Disclosure Number: IPCOM000124549D
Original Publication Date: 2005-Apr-27
Included in the Prior Art Database: 2005-Apr-27
Document File: 3 page(s) / 38K

Publishing Venue

IBM

Abstract

This invention is an idea of a heat sink which has one or more micro channel and a oscillating mechanism for liquid phase operation. It performs like heat pipe and beyond performance of copper heat sink. It can spread heat efficiently, so it can use conventional heat sink in combination for cooling high-power heat chips.

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Micro heat sink of forced oscillation type for high density heat source like CPU

The invention is intended to solve the problem of cooling high-power chips. It can use conventional heat sink in combination, because it works a heat spreader.

Figure 2 shows a current heat sink for CPU. This invention can be used instead of current heat sink. (see figure 2)

The invention is a heat sink which has one or more micro channel and a oscillating mechanism for liquid phase operation.

Figure 1. shows an idea of main structure of it.

The features are as follwings; (see figure 1) 1. Lid for micro channel 2. Unicursal fluid channel which radiate all directions 3. Liquid phase in channel 4. Vibrator for oscillating fluid
The lid(1) and the unicursal channel structure(2.3.) are bonded each other for fluid leakproof including a vibrator(4).

Table 1 shows a efficiency of heat conductivity compared to current heat sink and the invention.

Example 1 and 2 show ideas for oscillating mechanism.

5. CPU die and substrate

1. Lid

Fig.1 Structure

2. Unicursal channel which radiates all directions

3.Liquid phase in channel

4.Vibrator for oscillating fluid

Table 1. Heat conductivity

Material

Example-1 illustlates a voice coil structure of a vibrator for oscillating fluid.

Material

heat conductivity [W /m ・K]

heat conductivity [W /m ・K]

Copper (C1020)

Copper (C1020)

389

389

Oscillating heat sink

Oscillating heat sink

~16000

~16000

1

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