Patent ID: 9576807
Date: 2017-02-21
CPC Classifications: B24B,H01L

Claim:
1. A wafer processing apparatus comprising: a first surface plate on which a plurality of carriers is arranged; a first gear arranged at the central region of the first surface plate and engaged with the plurality of carriers; a second gear arranged around the edge region of the first surface plate and engaged with the plurality of carriers; a motor that rotates the first surface plate in a first direction; a fixing hanger arranged opposite the first surface plate; a second surface plate hung on the fixing hanger such that a clearance between the first surface plate and the second surface plate may be varied; at least two protrusions arranged at a region of the second surface plate opposite the fixing hanger; and support members respectively coupled with the at least two protrusions and obstructing movement of the second surface plate in a second direction, wherein each of the support members includes a body that extends from the outer portion of the second surface plate, and at least one support system combined with the body and surrounding each of the at least two protrusions.