Patent ID: 7344031

Claim:
A substrate storage container comprising: a container casing having an aperture through which a plurality of substrates are placed in or taken out; a cover adapted to fit into said aperture of said container casing; a sealing gasket capable of elastic deformation provided between said container casing and said cover; and a retainer, mounted on said cover, capable of retaining the periphery of each of the substrates; said retainer having: a supporting body mounted on the inside face of said cover, wherein the supporting body comprises a pair of first bars positioned on opposing sides with a separation therebetween and a pair of second bars respectively spanning a space between upper and lower end portions of said first bars; a plurality of elastic pieces provided with a separation therebetween in elastically deformable fashion on said supporting body so as to extend between said first bars; a slit formed at each side of each of said plurality of elastic pieces; and a block provided on each of said elastic pieces, said block retaining the periphery of one of the substrates; wherein 10.8× w<y< 34.3 ×w when a substrate retaining force of each of said elastic pieces is y in Newtons (N) and a weight per said substrate is w in kilograms (kg).