Patent ID: 6989334

Claim:
A method for making a semiconductor device comprising the steps of: (a) making a passivation film of inorganic insulation materials on a top layer of conductive wirings after forming the top layer of conductive wirings on a main surface of a semiconductor wafer, and then making a layer of organic material on said passivation film, (b) making a bonding pad by holing said layer of organic material and said passivation film on said top layer of conductive wirings by the etching that makes a photo resist film formed on said layer of organic material a mask, (c) heating said layer of organic material after removing said photo resist film by using a resist removal liquid, (d) making a semiconductor chip by dicing said semiconductor wafer, (e) mounting said semiconductor chip on a die pad after preparing a lead frame with said die pad with an outward appearance that is smaller than that of said semiconductor chip, (f) sealing said semiconductor chip and said die pad by resin mold, and wherein said method provides, between the step (c) and the step (d), a thinning of thickness of said semiconductor wafer by grounding the back of said semiconductor wafer in the state that the main surface of said semiconductor wafer is covered with a second photo resist film and a protect tape and then heating said layer of organic material.