Patent ID: 7581639
Filing Date: 2009-09-01
Classification: G03F,H01L

Abstract:
1. A photo mask delivery box, said photo mask delivery box having a bottom shell and a top cover shell to constitute an accommodating chamber for accommodating a photo mask, a plurality of locating blocks is provided inside said top cover shell, a plurality of retainers disposed on an inner surface of said top cover shell that faced toward said bottom shell to fix said photo mask, the characteristic of each said plurality of retainers is in that: each said plurality of retainers comprises a base, a top surface of said base having an U-turn, said U-turn disposed extended upward and reversed toward said base, and a clamp extended from the front side of said base to fasten to each said plurality of locating blocks inside said top cover shell, and a free end of said U-turn having a bearing portion and a retaining end portion, wherein said free end of said U-turn is separated from said base.