Patent ID: 8309882

Claim:
A mold removing method comprising: placing an IC chip covered with a molded member at a position toward which a measurement laser beam is emitted; irradiating the molded member with the measurement laser beam to measure an emitted light quantity toward the molded member and a reflected light quantity from the molded member; measuring a thickness of the molded member using the reflected light quantity from the molded member; obtaining a corrected value by normalizing the reflected light quantity from the molded member using the emitted light quantity toward the molded member, and comparing the corrected value with a set value, which is preset in accordance with the thickness of the molded member, to obtain a removal quantity of a mold to be removed in terms of a heightwise position of the molded member; and changing a laser emission condition based on the removal quantity of the mold and removing the molded member by laser processing.