Patent ID: 6974721

Claim:
A method of manufacturing a thin semiconductor chip, comprising: adhering a protective tape to a circuit forming surface of a thin wafer; adhering said protective tape, and thereby said thin wafer, to a first tape and adhering an inner ring-shaped frame, encircling an outer periphery of the thin wafer, to said first tape; forming a back electrode on a surface of the thin wafer opposite to the circuit forming surface; forming a resist pattern on said back electrode; etching along said resist pattern to divide said back electrode and said thin wafer into individual thin chips; removing said resist pattern; adhering said individual thin chips to a second tape and adhering an outer ring-shaped frame, encircling an outer periphery of the first ring-shaped frame, to said second tape; irradiating ultraviolet light onto a side of said first tape thereby to reduce an adhesive force between said protective tape and said thin chips and facilitate separating said protective tape, said first tape and said inner ring-shaped frame from said thin chips; and picking up said individual thin chips.