Patent ID: 11881418
Assignee: DISCO CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. A wafer cleaning apparatus for cleaning a circumferential edge of a wafer, the wafer cleaning apparatus comprising:
a holding table that holds the wafer by a holding surface such that the circumferential edge of the wafer protrudes;
a motor that rotates the holding table with a center of the holding surface as an axis,
a rotation control section that controls a rotational speed of the motor; and
a cleaning unit that jets water toward the circumferential edge of the wafer from an outer side of the circumferential edge of the wafer held by the holding surface, to clean the circumferential edge of the wafer,
wherein the cleaning unit includes:
a first nozzle that jets the water to the circumferential edge of the wafer from the outer side of the circumferential edge of the wafer in a 0-degree direction parallel to the holding surface,
a second nozzle that jets the water to the circumferential edge of the wafer from an outer upper side of the circumferential edge of the wafer in a direction of 45 degrees downward relative to the holding surface, and
a third nozzle that jets the water to the circumferential edge of the wafer from an outer lower side of the circumferential edge of the wafer in a direction of 45 degrees upward relative to the holding surface, and

the first nozzle, the second nozzle, and the third nozzle are disposed to be spaced from one another in a circumferential direction of the wafer.