Browse Prior Art Database

Thermal Interface Compound With Diamond-like Carbon

IP.com Disclosure Number: IPCOM000121308D
Original Publication Date: 1991-Aug-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 1 page(s) / 37K

Publishing Venue

IBM

Related People

Anschel, M: AUTHOR [+5]

Abstract

This article envisages a new thermal interface compound (or thermal paste) with improved thermal, electrical and stability (non-bleeding) characteristics by using diamond-like carbon (DLC) particles suspended in a liquid.

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Thermal Interface Compound With Diamond-like Carbon

      This article envisages a new thermal interface compound
(or thermal paste) with improved thermal, electrical and stability
(non-bleeding) characteristics by using diamond-like carbon (DLC)
particles suspended in a liquid.

      Thermal paste (or grease) is typically a dispersion of ceramic
or metallic solids in a liquid.  Prior art [1,2] contains
descriptions of different formulations and choices for the solid
fillers (shape, size, etc.) and liquid.

      The thermal conductivity of the filler particles is reflected
in the thermal conductivity of the paste when the distance between
the filler particles is decreased through an increase in the solid
concentration or otherwise promoting close approach of the particles.
In such cases, it is beneficial to use fillers of high thermal
conductivity.

      Diamond-like carbon (DLC) combines the desirable properties of
the high thermal conductivity of the metals with the low specific
gravity of carbon to yield a thermal paste with improved thermal and
non-bleeding characteristics.  In addition, DLC is also electrically
insulating for applications requiring electrical isolation.

      The diamond-like carbon particles may be used singly or in
combination with other thermal fillers, such as metal or ceramic
particles. The ceramic fillers may be oxides, carbides or nitrides.
Diamond powders may also be used. The liquid carrier may be a
silicone oil (poly...