Patent ID: 7477523
Filing Date: 2009-01-13
Classification: H01L,H05K

Abstract:
1. A semiconductor device having at least: a square wiring board having a board core made of an insulating material, wires made of a metal and formed on a first surface of said board core, a solder resist film formed on the first surface to cover said wires, and openings formed by partially opening said solder resist film, wherein a plurality of said wires are arranged in parallel on the bottom of said openings; a semiconductor chip having electrodes flip chip connected to said wires arranged on the bottom of said openings of said wiring board through a conductive bonding material; and an insulating resin for filling an interstice between said wiring board and said semiconductor chip, wherein said wires extend along a width direction orthogonal to a longitudinal direction of said openings, said openings comprise elongated grooves which extend along at least two opposing sides of the square of said wiring board, a pair of opposing edges of said opening along the longitudinal direction define zig-zag edges in which the widths of the opening seem to be longer and shorter in a repeating sequence, and recessed edge portions which recess toward the outside of said opening formed by said zig-zag edges in the width direction correspond to said wires, and protruded edge portions which protrude toward the inside of said opening formed by said zig-zag edges in the width direction correspond to said board core between adjoining said wires.