Patent ID: 6347037
Filing Date: 2002-02-12
Classification: H01L

Abstract:
A semiconductor device comprising:a board; a semiconductor chip which is connected to an upper surface of the board by use of bumps; a frame-shape member which is connected to said upper surface of said board with first adhesive, and has an opening to accommodate said semiconductor chip therein and a recess provided at each comer of said opening; and a plate-shape member which is situated to cover said semiconductor chip and said frame-shape member, and is connected to said semiconductor chip and said frame-shape member with second adhesive, wherein a modulus of rigidity GP, a thermal expansion coefficient &agr;P, and a volume VP of said board are related with a modulus of rigidity GM, a thermal expansion coefficient &agr;M, and a volume VM of said plate-shape member such that GPÃ—&agr;PÃ—VP is substantially equal to GMÃ—&agr;MÃ—VM, and said frame-shape member has a sufficient sturdiness to substantially prevent deformations of said board and said plate-shape member.