Patent ID: 8292081

Claim:
A substrate storage container comprising: a container body for storing substrates; a door element fitted to an opening of the container body; and a compressively deformable gasket for sealing between the container body and the door element; wherein a gasket fitting portion is formed on one of an inner periphery of the opening of the container body or the door element while a sealing surface for the gasket is formed on an opposing one of the door element or the inner periphery of the opening of the container body such that a difference between a maximum and a minimum of a flatness of the sealing surface is less than 0.50 mm, wherein the gasket comprises: a base fitted to the fitting portion; a flexible sealing part extended from the base toward the sealing surface; and a contact portion formed in the sealing part and contacts the sealing surface, wherein the gasket is formed in a frame shape, wherein the sealing part is approximately in a shape of a rectangular cylinder; wherein the sealing part comprises: a first group of tapered projections on an outer peripheral side and a second group of tapered projections on an inner peripheral side, wherein each of the first and second groups of tapered projections includes at least two projections having a substantively same shape but a different size from one another, and wherein the sealing part is molded of thermoplastic elastomer or rubber.