Patent ID: 7897717

Claim:
An insulating liquid die-bonding agent for bonding a semiconductor-chip-mounting member to an active surface of a semiconductor chip, said agent comprising: (A) 100 parts by mass of a mixture of (a-1) an organopolysiloxane resin composed of siloxane units of formula R 1 3 SiO 1/2 , siloxane units of formula R 1 2 R 2 SiO 1/2 , and siloxane units of formula SiO 4/2 (wherein R 1 is a univalent hydrocarbon group, except for an alkenyl group, and R 2 is an alkenyl group) and (a-2) a linear-chain organopolysiloxane having in one molecule at least two alkenyl groups, with a mass ratio of (a-1) to (a-2) in the range of (30:70) to (60:40); (B) an organopolysiloxane having in one molecule at least two silicon-bonded hydrogen atoms, where component (B) is used in such an amount that the mole ratio of the silicon-bonded hydrogen atoms of this component to 1 mole of alkenyl groups of component (A) is within the range of 0.1 to 10 moles; (C) 0.1 to 10 parts by mass of an organic silicon compound having in one molecule at least one silicon-bonded alkoxy group; (D) 5 to 50 parts by mass of insulating spherical silicone rubber particles having an average diameter of 0.1 to 50 μm and having a type A durometer hardness according to JIS K 6253 equal to or below 80; and (E) a catalytic quantity of a hydrosilylation-reaction catalyst; wherein component (D) is aggregated with an average diameter of aggregated particles of 1 to 100 μm.