Patent ID: 11901214
Assignee: ZEUS COMPANY LLC
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 6:
7. The wafer processing apparatus of claim 6, wherein:
a vacuum flow path packing seating groove, which is recessed in an annular shape, is formed in the inner circumferential surface of the fixed core;
the vacuum flow path packing includes a body portion which is inserted and seated in the vacuum flow path packing seating groove and has a through-hole formed such that the second horizontal vacuum flow path is not closed, and a lip portion which protrudes from the body portion toward the outer circumferential surface of the rotating core to be in contact with the outer circumferential surface of the rotating core without closing the first horizontal vacuum flow path; and
in a direction toward the outer circumferential surface of the rotating core in the horizontal direction, the lip portion of the vacuum flow path packing protrudes in the vertical direction to be inclined in a direction away from the first horizontal vacuum flow path.