THREE PHASE COMPOSITE MATERIAL WITH HIGH THERMAL CONDUCTIVITY AND ITS PRODUCTION

The present invention is concerned with high thermal conductivity materials for use as heat dissipaters in microelectronic and optoelectronic devices and power generators and the principle object is to develop a composite material with high thermal performance and low cost for use as heat dissipater...

Full description

Saved in:
Bibliographic Details
Main Authors PRIETO ALFONZO, RICHARD, LOUIS CERECEDA, ENRIQUE, NARCISO ROMERO, FRANCISCO, JAVIER, MOLINA JORDA, JOSE, MIGUEL
Format Patent
LanguageEnglish
French
German
Published 09.12.2009
Subjects
ALLOYS
ARTIFICIAL STONE
BASIC ELECTRIC ELEMENTS
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SEMICONDUCTOR DEVICES
SLAG
TREATMENT OF ALLOYS OR NON-FERROUS METALS
TREATMENT OF NATURAL STONE
Online AccessGet full text

Cover

More Information
Summary:The present invention is concerned with high thermal conductivity materials for use as heat dissipaters in microelectronic and optoelectronic devices and power generators and the principle object is to develop a composite material with high thermal performance and low cost for use as heat dissipaters in semiconductor devices, and to develop a process for producing said material. More specifically, the materials as per the invention have thermal conductivity above 200 Wm -1 K -1 and a thermal expansion coefficient in the interval 2 to 10x10 -6 K -1 (measured in the temperature interval 20 to 300°C, in at least two directions). The composite material is constituted in three steps: 1) a step principally formed by graphite flakes (step A); 2) a second step (step B) involving particles or fibers of a flake separating material, chosen from a ceramic material (which preferably is chosen from SiC, BN, AIN, TiB 2 and diamond) and carbon fibers, having high thermal performance in at least one direction; and finally, 3) a third step (step C) formed by a metal alloy. Although the three steps must have good thermal properties, step A (graphite flakes) is the principal source of the properties of the subject material of this invention. Step B acts as separator of the layers of step A by facilitating the infiltration of step C, which consolidates the preform.
Bibliography:Application Number: EP20080761434