Patent ID: 8053680
Filing Date: 2011-11-08
Classification: H01L,H05K

Abstract:
1. A wiring board, comprising: a plate-shaped resin member; piercing electrode pads provided on the plate-shaped resin member; chip connection pads provided in the resin member, the chip connection pads having connection surfaces electrically connected to electrode pads provided on a semiconductor chip, the connection surfaces being situated in substantially the same plane as a first surface of the resin member, the first surface being a side where the semiconductor chip is mounted; pads provided in a portion of the resin member, the portion being situated outside an area where the chip connection pads are formed; lead wirings connected to the pads at one end and connected to the piercing electrode pads at the other end; and conductive wires sealed by the resin member, the conductive wires electrically connecting the chip connection pads and the pads to each other, wherein the number of the pads arranged in a first direction is m≧2) and the number of the pads arranged in a second direction is n (n≧2); the pads and the lead wirings are arranged in an L×W area located on the resin member outside the area where the chip connection pads are provided, so that a length L in the first direction of the area where the pads and lead wirings are formed satisfies the following formula 1 and a length W in the second direction of the area where the pads and lead wirings are formed satisfies the following formula 2; where P represents an arrangement pitch in the first direction of the chip connection pads; w