Patent ID: 6308938
Filing Date: 2001-10-30
Classification: H01L

Abstract:
A ball grid array semiconductor integrated circuit device comprising:a semiconductor chip having a plurality of connection pads;a carrier base having a first surface to which the semiconductor chip is mounted;a plurality of conductors, each conductor being electrically connected to a corresponding one of the connection pads, the conductors penetrating through the carrier base from the first surface to an opposite, second surface of the carrier base;a plurality of external connection terminals, each external connection terminal having a spherical shape, being disposed on the second surface of the carrier base, and being electrically connected to a corresponding one of the conductors;a sealing resin layer surrounding a periphery of the semiconductor chip; anda reinforcement base, wherein the semiconductor chip and the sealing resin layer form a core material, the carrier base and the reinforcement base are skin materials sandwiching the core material, the semiconductor chip is located centrally between the carrier base and the reinforcement base, and the carrier base and the reinforcement base have the same coefficient of thermal expansion whereby thermal stresses in the carrier base and the reinforcement base in response to temperature changes are substantially equal.