Patent ID: 9669984
Date: 2017-06-06
CPC Classifications: B65B,B65D,G03F,H01L

Claim:
1. An apparatus, comprising: a base configured to support a patterning device configured to impart a beam of radiation with a pattern in its cross-section; and an inner cover couplable to the base, the inner cover comprising a restraining mechanism that, upon an application of a force external to the inner cover, is configured to provide an in-plane force to the patterning device to restrain movement of the patterning device, the in-plane force being substantially parallel to a patterning surface of the patterning device, the restraining mechanism including a structure configured to apply the in-plane force to the patterning device without contacting any side of the patterning device that is parallel to the patterning surface or an edge of said side.