Patent ID: 8910792

Claim:
A substrate storage container comprising: a container main body for storing a plurality of disc-shaped substrates in a parallel manner; a substrate transfer opening that is formed in the container main body for transferring the disc-shaped substrate relative to the container main body; a lid body that is attached in a detachable manner from outside to the substrate transfer opening in order to seal the substrate transfer opening; a back side holding portion that positions and holds an outer edge portion of each of the disc-shaped substrates in a back side area inside of the container main body as seen from the substrate transfer opening; a lid side retainer that is provided at an inner wall portion of the lid body and that positions and holds each of the disc-shaped substrates by pushing to a side of the back side holding portion; and a substrate temporal placement piece for placing the disc-shaped substrate at an area proximal to the substrate transfer opening when the lid body is not attached to the substrate transfer opening, wherein the substrate storage container further comprises: a substrate placement portion for placing a vicinity of the outer edge portion of the disc-shaped substrate in a back side area inside of the container main body as seen from the substrate transfer opening, when the disc-shaped substrate is not being pushed by the lid side retainer; and a substrate return means for returning the disc-shaped substrate to a position not held or positioned by the back side holding portion, when the disc-shaped substrate that is being pushed by the lid side retainer enters a state not being pushed by way of the lid side retainer; and wherein a position of the substrate temporal placement piece is established such that: the substrate temporal placement piece overlaps with the disc-shaped substrate as seen in a vertical direction with respect to a face of the disc-shaped substrate, when the lid body is removed from the substrate transfer opening and the disc-shaped substrate is not held or positioned by the back side holding portion; and the substrate temporal placement piece does not overlap with the disc-shaped substrate as seen in a vertical direction with respect to a face of the disc-shaped substrate, when the lid body is attached to the substrate transfer opening and the disc-shaped substrate is pushed to a position being positioned and held by the back side holding portion.