Patent ID: 7339264

Claim:
A semiconductor device, comprising: a board having a mounting surface and an opposite surface; and a semiconductor chip mounted on the mounting surface of the board, the semiconductor chip having an active surface and an inactive surface disposed opposite the active surface, the semiconductor chip being joined to the board in a state where the active surface thereof is facing to the board and the inactive surface thereof is exposed; the semiconductor chip having a thickness 100 μm to 200 μm; and a protective resin permanently joined to the mounting surface of the board covering a sidewall of the semiconductor chip with the inactive surface thereof exposed to the outside of the protective resin, having a surface formed so as to be flush with an inactive surface of the semiconductor chip and having a side surface formed so as to be flush with a side surface of the board wherein the resin side surface and the chip side surface meet within a plane perpendicular to the mounting surface of the board.