Patent ID: 6885092

Claim:
A semiconductor device comprising: a resin sealing material; two semiconductor chips located at the inside of said resin sealing material, each chip having an external terminal formed on a circuit forming surface thereof; and a first lead extending to the inside and outside of said resin sealing material for transmitting a clock signal in common to said two chips, wherein said first lead is branched at least to two branching leads within said resin sealing material, said one first branching lead is fixed to the circuit forming surface of one semiconductor chip and is then connected to the external terminal of the circuit forming surface, the other first branching lead is fixed to the circuit forming surface of the other semiconductor chip and connected to the external terminal of the front surface, said two semiconductor chips are laminated with the respective rear surfaces provided face to face and a pair of second leads are provided to input a pair of chip select signals for individually selecting said two semiconductor chips.