Patent ID: 11929256
Assignee: DISCO CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 3:
4. A grinding apparatus for grinding a wafer that has a chamfered portion formed at a periphery thereof and is attached, at a front surface thereof, to a protective tape having a diameter same as that of the wafer, comprising:
a holding table for holding the wafer through the protective tape;
a grinding unit including a plurality of grinding stones for grinding the wafer held by the holding table; and
a heating unit that heats and contracts a protruding portion where the protective tape protrudes from the wafer, the protruding portion having been formed as a result of reduction in diameter of the wafer when the wafer is ground by the grinding unit to be thinned to a thickness thinner than half of an original thickness; and
a table, wherein the wafer, which is not attached to a dicing tape, is placed on the table when the heating unit is heating and contracting the protruding portion of the protective tape.