Patent ID: 11878387
Assignee: DISCO CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 1:
2. The as-sliced wafer processing method according to claim 1, further comprising:
a second grinding step of holding the as-sliced wafer on the chuck table such that the ground first surface faces downward and a second surface opposing the first surface faces upward, and rotating the grinding wheel such that the grinding stones pass through a rotation center of the as-sliced wafer held on the chuck table, to thereby grind the second surface of the as-sliced wafer;
a second outer periphery positioning step of moving the chuck table and the grinding unit relative to each other in directions parallel to the holding surface so as to position the edge on the outer periphery of the grinding stones at an outer peripheral edge of the second surface of the as-sliced wafer after the second grinding step is carried out; and
a second chamfering step of chamfering an outer periphery of the second surface of the as-sliced wafer by the grinding stones after the second outer periphery positioning step is carried out,
wherein the second chamfering step positions the edge on the outer periphery of the grinding stones at the outer peripheral edge of the second surface of the as-sliced wafer and, while causing the grinding stones to approach the chuck table, moves the grinding stones in a direction toward the outer periphery of the second surface of the as-sliced wafer, to thereby grind the outer peripheral edge of the second surface to form a chamfered portion on the second surface.