PURPOSE: To provide a highly heat-conductive heat radiation sheet which ensures intimate contactness with a heating generating body, reduces a heat contact resistance between the heat generating body and a cooling component and improves heat radiation characteristic of the heat generating body.
CONSTITUTION: A heat radiating sheet 5a is characterized in dispersing aluminum nitride powder particles into a matrix resin as a filler and including a plasticizer of 10 to 120wt.%. to amount of matrix resin. The preferable plasticizer should dissolve resin under the normal temperature and have the boiling point of 50°C or higher. Moreover, the matrix resin should desirably be formed of a thermo setting resin. In addition, the recommended mean grain size of raw material powder particles of aluminum nitride, sintered aluminum nitride and alulminum nitride single crystal is 30μm or less. The recommended powder particles of sintered alulminum nitride or aluminum nitride single crystal should have a heat conductivity of 150W/m.K or higher.
FUJIMORI YOSHINORI
SHIMOTORI KAZUMI
IWASAKI HIDEO
SASAKI TOMIYA
