Patent ID: 6558975
Filing Date: 2003-05-06
Classification: H01L

Abstract:
A process for producing a semiconductor device, comprising the steps of:providing a wafer of given thickness having a surface furnished with semiconductor circuits and a back; forming grooves of a cut depth smaller than the thickness of the wafer, said grooves extending from the wafer circuit surface; sticking a surface protective sheet onto the wafer circuit surface; grinding the back of the wafer so that the thickness of the wafer is reduced to a thickness whereby the grooves are exposed at the back surface which results in a division of the wafer into individual chips with spaces therebetween; sticking a pressure sensitive adhesive sheet for pickup step onto the ground back of the wafer, said pressure sensitive adhesive sheet for pickup step comprising a base and, superimposed thereon, an energy radiation curable pressure sensitive adhesive layer; exposing the energy radiation curable pressure sensitive adhesive layer to an energy radiation; and peeling the surface protective sheet from the wafer circuit surface.