Browse Prior Art Database

High Conductivity Fibrous Heat Sink

IP.com Disclosure Number: IPCOM000116353D
Original Publication Date: 1995-Sep-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Bruhn, PH: AUTHOR [+4]

Abstract

This invention describes a compact method of dissipating high heat loads by means of high thermal conductivity unidirectional graphite fibers or graphite fibers coated with copper which are readily manufacturable.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

High Conductivity Fibrous Heat Sink

      This invention describes a compact method of dissipating high
heat loads by means of high thermal conductivity unidirectional
graphite fibers or graphite fibers coated with copper which are
readily manufacturable.

      The thermal conductivity of such fibers is in the range of 400
- 850 W/mK.  The fibers could be press-fitted into a base with holes
or could be soldered/brazed into a copper base.  The final product
would then look like a tooth-brush, in the sense that a cluster of
fibers could be emerging out of a single hole as shown in Fig. 1.

      Another configuration of this invention is shown in Fig. 2
with fibers g out and fixed to two plates maintained at a desirable
distance.  The fluid can flow through across the fibers or can be
used in impingement mode.  The fibers can be staggered or inline as
shown in Fig. 3.

      In an air-cooling application on a 55x55 mm base, it is
estimated that a high density fibrous heat sink can enhance heat
transfer performance by as much as 100 percent compared with one of
the best commercially extruded aluminum heat sinks in the same heat
sink volume.  The heat sink structure may be used in conjunction with
any other fluid such as water or fluorinerts.