Thermally conductive sheet

A thermally conductive sheet consisting of

• a glass cloth filled with a thermally conductive resin composition, and
• a cured, cured thermally conductive silicone composition on one or both surfaces of the glass cloth, wherein
• the thermally conductive silicone composition comprises a silicone component and thermally conductive filler (C) of an amount of 1,200 to 2,000 parts by mass, relative to 100 parts by mass of the silicone component,
• the thermally conductive filler (C) has an average particle size smaller than 15 μm,
• an amount of particles having a particle size of 45 μm or larger is 0 to 3 mass % and an amount of particles having a particle size of 75 μm or larger is 0 to 0.01 mass %, based on an amount of the thermally conductive filler (C), and
• the silicone component comprises:
• an organopolysiloxane (A) which has at least two alkenyl groups each bonded to a silicon atom and has the following average compositional formula:
• R1aSiO(4-a)/2
• wherein R1 is, independently of each other, substituted or unsubstituted, monovalent hydrocarbon group having 1 to 10 carbon atoms and a is 1.90 to 2.05;
• and
• (D) at least one of the following (D1) or (D2):
• (D1) an alkoxy silane represented by the following formula (1):
• R2aR3bSi(OR4)4-a-b (1)
• wherein R2 is, independently of each other, an alkyl group having 6 to 15 carbon atoms, R3 is, independently of each other, a substituted or unsubstituted, monovalent hydrocarbon group having 1 to 12 carbon atoms, R4 is, independently of each other, an alkyl group having 1 to 6 carbon atoms, a is an integer of from 1 to 3, and b is an integer of from 0 to 2, provided that a total of a and b is 1 to 3;
• or
• (D2) a dimethylpolysiloxane in which one terminal is capped with a trialkoxysilyl group and which is represented by the following formula (2):
• wherein R5 is, independently of each other, an alkyl group having 1 to 6 carbon atoms and c is an integer of from 5 to 100.