US Patent 7357258 Thin-plate supporting container

The attaching-and-detaching operation of a lid unit, and the operation of taking in and out semiconductor wafers stored in a container body are facilitated. Thin-plate supporting units for supporting semiconductor wafers are provided in the container body of a thin-plate supporting container, and wafer holding units for pressing and supporting the semiconductor wafers, supported by the thin-plate supporting units, from a lid unit side are provided inside a lid unit. The area of a lower surface of a V-shaped groove of the wafer holding unit is increased. The V-shaped groove easily fits the peripheral portion of the semiconductor wafer when attaching the lid unit to the container body. The lower surface of a V-shaped groove of the thin-plate supporting portion is roughened to enhance slipping property with respect to the semiconductor wafer. The angle of inclination of a ridge is determined to be 2 to 5 degrees with respect to the horizontal direction.