Patent ID: 8292079

Claim:
A semiconductor chip holding tray, a plurality of which are used by being stacked one on another, which holds a plurality of semiconductor chips of a rectangular planar shape, comprising: a base substrate; a first projection which, being provided on the front surface of the base substrate, and disposed on a short edge side of the perimeter of a holding area in which one semiconductor chip is held, has a depression having a triangular cross-section in which a triangular cross-section projection is fitted; a first raised portion which, being provided on the front surface of the base substrate, is disposed on a long edge side of the perimeter of the holding area; a triangular cross-section second projection which, being provided on the rear surface of the base substrate, is disposed on a short edge side of the perimeter of a holding area in which one semiconductor chip is held, a vertex angle of the triangular cross-section second projection being more acute than a vertex angle of the depression of the first projection; and a second raised portion which, being provided on the rear surface of the base substrate, is disposed on a long edge side of the perimeter of the holding area, wherein when two semiconductor chip holding trays are stacked one on the other in such a way that the front surface of the base substrate is opposed to the rear surface of the base substrate, the holding area formed on the front surface of the base substrate and the holding area formed on the rear surface of the base substrate are aligned, the second projection is fitted in the depression of the first projection, and the first raised portion and second raised portion are not aligned.