Patent ID: 9527649
Filing Date: 2016-12-27
CPC Classification: B63C,B65B,B65D,H01L

Claim Text:
1. A mask storage device for storing a mask used in lithography, the mask storage device comprising: a desiccant retainer for receiving a desiccant, the desiccant retainer comprising one or more passages; a first shell and a second shell, the second shell removably attached to the first shell and arranged to form a sealed space with the first shell in a closed state, the desiccant retainer positioned in the sealed space and displaceable relative to the sealed space; and a gasket positioned between the first shell and the second shell and configured to create a sufficiently airtight seal between the first shell and the second shell in the closed state, wherein the one or more passages of the desiccant retainer comprise one or more membranes.