Patent ID: 8627959

Claim:
A substrate storage container comprising: a container body configured to be formed of a front open box and accommodate wafers having a diameter of 300 nm or greater; and a door configured to open and close an open front of the container body, and the container body including supporting bodies that can support wafers on both interior side walls thereof, and the door comprising: a casing configured to be engaged with the open front of the container body; a front plate configured to cover an open front of the door; and a locking mechanism configured to be interposed between the casing and the front plate, and the supporting body respectively comprising: a frame configured to oppose a direction of an internal side of the container body; and supporting members configured to be projected from the frame and support the wafers, and the supporting members being respectively formed of: a front supporting piece that is projected from the frame and approximately horizontally retains the wafer on, at least, a side part of a front peripheral edge; and a rear supporting piece that is projected from the frame and approximately horizontally retains the wafer on, at least, a side part of a rear peripheral edge; and wherein the front supporting piece is formed of: a projected part that extends from the front of the frame toward the front peripheral edge of the wafer; and a curved part extends rearwards from the projected part along the peripheral edge of the wafer, and wherein the frame of the supporting body includes a pair of top and bottom crossrails arranged apart from and opposing to each other, and a pair of stiles arranged vertical at the front and rear between the pair of crossrails, and wherein a left-and-right direction positioning attachment portion for positioning with respect to the left and right direction and a vertical direction positioning attachment portion for positioning with respect to the vertical direction are respectively provided on the pair of top and bottom crossrails, and wherein front retainers configured to hold the side part of the front peripheral edge of the wafer are attached to a back surface of the casing of the door, and wherein the locking mechanism of the door is made up of: rotary plates configured to be rotatably supported on the casing of the door; side plates configured to slide upwards and downwards in accordance with rotation of each rotary plate; and engagement claws configured to be projected from the casing in accordance with a slide of each slide plate, and wherein the locking mechanism is disposed in front of the front retainers, and wherein the frame of the supporting body, the front supporting piece, and the rear supporting piece are integrally molded with a hollow formed between the frame and the front supporting piece.