Patent ID: 7845374

Claim:
A gas filling apparatus for photomask box adapted to fill a photomask box with at least one particular gas, said gas filling apparatus comprising a gas filling chamber, said photomask box comprising a cover member, said cover member being disposed with a plurality of through holes and a plurality of recesses, which are used to be coupled with said gas filling chamber, the improvement of said gas filling chamber comprising: three protrusive pillars, fixedly disposed on a bottom surface of said gas filling chamber; seven buffer blocks, fixedly disposed on said bottom surface of said gas filling chamber; at least one gas inlet, fixedly disposed on said bottom surface of said gas at least one gas outlet, fixedly disposed on said bottom surface of said gas filling chamber; a plurality of clamping elements, fixedly disposed on said bottom surface of said gas filling chamber; and an ion generator, disposed in said gas filling chamber for generating and emitting ions; wherein the position of said protrusive pillars being a triangular configuration, said protrusive pillars being correspondingly and respectively embedded into said plurality of recesses, at least one of said buffer blocks propping against each side of said cover member, said plurality of clamping elements respectively propping against two opposite sides of said cover member, and said gas inlet and said gas outlet being respectively coupled with said plurality of through holes when said photomask box is placed in said gas filling chamber.