Patent ID: 7495329

Claim:
A semiconductor memory card which inputs/outputs signals by connecting to an external device, comprising: a circuit board on an upper surface of which board terminals connected to board wiring are formed, and on a lower surface of which input/output card terminals for inputting/outputting the signals to/from the external device, a power supply card terminal for supplying electric power, and a ground card terminal connected to ground potential by connecting to the external device are provided; a nonvolatile memory chip which is mounted on the upper surface of the circuit board, and has a plurality of first bonding pads formed close to a first side of the nonvolatile memory chip in a manner that the plurality of first bonding pads are wire-bonded to a plurality of first board terminals formed on the circuit board along the first side; and a controller chip which is mounted on the nonvolatile memory chip, and has a plurality of second bonding pads formed in a manner that the plurality of second bonding pads are wire-bonded to a plurality of second board terminals formed on the circuit board along a second side of the nonvolatile memory chip, adjacent to the first side, and which controls the nonvolatile memory chip, wherein the power supply card terminal or the ground card terminal has a connection which can be connected to the external device and an extension extended from the connection in a manner that the connection and the extension are along the first board terminals and the second board terminals via the circuit board, the connection and the extension being formed on the lower surface of the circuit board, and being connected to the first board terminals or the second board terminals via through hole interconnections and the board wiring.