THERMOSETTING RESIN COMPOSITION, B-STAGE HEAT CONDUCTIVE SHEET, AND POWER MODULE

摘要

PROBLEM TO BE SOLVED: To provide a thermosetting resin composition providing a heat conductive sheet of excellent heat conductivity while holding an electric insulating property by controlling the generated part and a magnitude of a defect such as a void and a crack, and a B-stage heat conductive sheet.

SOLUTION: The thermosetting resin composition includes an inorganic filler and thermosetting resin 5. The inorganic filler contains secondary sintered particles 1 composed of primary particles 6 of scale-like boron nitrides, and at least part of the secondary sintered particles has a maximum pore diameter 7 of 5 μm or larger and 80 μm or smaller. The B-stage heat conductive sheet is formed by dispersing the inorganic filler in the thermosetting resin in a B-stage state. The inorganic filler contains secondary sintered particles composed of primary particles of scale-like boron nitrides, and at least part of the secondary sintered particles has a maximum pore diameter of 5 μm or larger and 80 μm or smaller.

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