Patent ID: 8053886

Claim:
A semiconductor package comprising: a wiring board; and a semiconductor device mounted on said wiring board, said semiconductor device including: a semiconductor chip; at least one penetration hole extending from one surface of said semiconductor chip to an opposite surface of said semiconductor chip; a penetration electrode situated inside said penetration hole without contacting a wall of said penetration hole, said penetration electrode having one end fixed to said one surface of said semiconductor chip and an opposite end protruding from said opposite surface of said semiconductor chip; and a connection terminal formed on said opposite end of said penetration electrode and electrically connected to said wiring board, wherein said penetration electrode includes: a penetration part situated inside said penetration hole without contacting said wall of said penetration hole; and a support part integrally formed with said penetration part and including said one end fixed to said one surface of said semiconductor chip, the support part having a spring characteristic, wherein a space is formed between said support part and said semiconductor chip.