Patent ID: 8318275

Claim:
A substrate storage container of a front open box type including supporting structures that are disposed on two sides inside a container body for storing substrates and support substrates in array, each supporting structure being formed of a multicolor molding article wherein the supporting structure includes a supporting wall of a first molding material and positioned on an inner side in the container body, a supporting piece formed of the first molding material and supported on the supporting wall, and a contact layer formed of a second molding material and integrally laminated over a part of the supporting wall and the supporting piece to come in contact with the substrate; wherein the first molding material comprises polycarbonate, cycloolefin polymer, or polyether imide; wherein the second molding material comprises polybutylene terephthalate, polypropylene, polyethylene, polyethylene terephthalate, polyacetal, or polyether etherketone; wherein peripheral portions of boundaries between a part of the supporting wall and the contact layer, and between the supporting piece and the contact layer are formed with in approximately triangular sections with tapering thin projected pieces, respectively, the tapering inclined angle of the thin projected pieces being specified to range from 5° to 40°; and wherein the thin projected pieces are formed to have their inclined surfaces specified to be 0.4 to 5.0 mm in length.