Patent ID: 8470937
Filing Date: 2013-06-25
Classification: C08G,C08L,H01L,Y10T

Abstract:
1. A curable composition for semiconductor encapsulation, comprising, as component (A), a SiH group-containing siloxane compound represented by the following formula (1); as component (B), a vinyl group-containing siloxane compound represented by the following formula (2); as component (C), a compound represented by the following formula (19) or by the following formula (20); and as component (D), a hydrosilylation catalyst: wherein X 1 represents a residue obtainable by excluding hydrogen atoms from the SiH groups of a compound having two SiH groups and having a molecular weight of 1000 or less; X 2 represents a residue obtainable by excluding hydrogen atoms from the SiH groups of a compound having two SiH groups and having a molecular weight of 1000 or less, or a residue obtainable by excluding vinyl groups from a compound having two vinyl groups and having a molecular weight of 1000 or less; Y 1 represents a polysiloxane group represented by the following formula (3); a represents a number of 0 or 1; and x represents a number from 0 to 10, provided that the compound represented by the formula (1) is such that the mass average molecular weight is 3000 to 1,000,000; the proportion of the number of aryl groups each having 6 to 10 carbon atoms and bonded to silicon atoms, with respect to the sum of the number of alkyl groups each having 1 to 4 carbon atoms and bonded to silicon atoms and the number of aryl groups each having 6 to 10 carbon atoms and bonded to silicon atoms, is 0.05 to 0.5; and the content of Y wherein X 3 represents a residue obtainable by excluding vinyl groups from a compound having two vinyl groups and having a molecular weight of 1000 or less; X 4 represents a residue obtainable by excluding vinyl groups from a compound having two vinyl groups and having a molecular weight of 1000 or less, or a residue obtainable by excluding hydrogen atoms from the SiH groups of a compound having two SiH groups and having a molecular weight of 1000 or less; Y 2 represents a polysiloxane group represented by the following formula (4); b represents a number of 0 or 1; and y represents a number from 0 to 10, provided that the compound represented by the formula (2) is such that the mass average molecular weight is 3000 to 1,000,000; the proportion of the number of aryl groups each having 6 to 10 carbon atoms and bonded to silicon atoms, with respect to the sum of the number of alkyl groups each having 1 to 4 carbon atoms and bonded to silicon atoms and the number of aryl groups each having 6 to 10 carbon atoms and bonded to silicon atoms, is 0.05 to 0.5; and the sum of the contents of Y wherein R 1 to R 3 each independently represent an alkyl group having 1 to 4 carbon atoms; R 4 to R 6 each independently represent an aryl group having 6 to 10 carbon atoms; R 7 to R 10 each independently represent an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms; c, d and e represent numbers that make up the mass average molecular weight of the compound represented by the formula (1) to 3000 to 1,000,000; wherein R 11 to R 13 each independently represent an alkyl group having 1 to 4 carbon atoms; R 14 to R 16 each independently represent an aryl group having 6 to 10 carbon atoms; R 17 to R 20 each independently represent an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms; f, g and h represent numbers that make up the mass average molecular weight of the compound represented by the formula (2) to 3000 to 1,000,000; wherein R 30 represents an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms; m represents a number from 3 to 6; and R 11 to R 20 , f, g and h have the same meanings as those defined for the formula (4); and wherein R 41 represents an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms; s represents a number from 3 to 6; and R 1 to R 10 , c, d and e have the same meanings as those defined for the formula (3).