Patent ID: 7629687
Filing Date: 2009-12-08
Classification: H01L

Abstract:
1. A semiconductor device comprising: a wiring board having a plurality of conductive wires aligned on an insulating base material and a board bump with a plated metal formed on each conductive wire so as to cover an upper surface and both sides of the conductive wire; and a semiconductor chip mounted on the wiring board, with electrodes of the semiconductor chip being connected to the conductive wires via the board bumps, wherein chip bumps are formed on the electrodes of the semiconductor chip, the electrodes of the semiconductor chip are connected to the conductive wires via a bond between the chip bumps and the board bumps, a flat area of the chip bumps is larger than an area of the bond with the board bumps, the board bumps have a lower hardness than that of the chip bumps, and protruding portions are formed by part of the plated metal of the board bumps at the bonded portion peeling off and protruding outwardly from a bonding surface of the chip bumps and the board bumps.