Abstract: A multilayer wiring board 10 has a high-capacitance layer 121 formed between a ground layer 141 and a power supply layer 15 and a high-capacitance layer 122 formed between the power supply layer 15 and a ground layer 142. The high-capacitance layers 121 and 122 are different in capacitance from each other. The multilayer wiring board 10 incorporates two capacitors which share the power supply layer 15 with each other and which are different in capacitance from each other.

Abstract: A room temperature curing elastic composition useful as a sealing material which comprises as a main component a polymer produced from(a) at least one acrylic ester monomer of the formula:CH.sub.2 .dbd.CHCOOR.sub.1wherein R.sub.1 is an alkyl having 2 to 8 carbon atoms;(b) at least one member selected from the group consisting of vinylalkoxysilane of the formula: ##STR1## wherein R.sub.2 is an alkyl having 1 to 4 carbon atoms, X is methoxy or ethoxy, and a is 0, 1 or 2; and a (meth)acryloxyalkoxysilane of the formula: ##STR2## wherein R.sub.3 is hydrogen or methyl, R.sub.4 is a divalent hydrocarbon group, R.sub.5 is an alkyl having 1 to 4 carbon atoms, Y is methoxy or ethoxy, and b is 0, 1 or 2; and(c) a chain transfer agent having a mercapto group.