Patent ID: 8309429

Claim:
A method for manufacturing a semiconductor substrate, comprising: arranging a plurality of single crystal semiconductor substrates on a tray; placing a base substrate over the tray provided with the plurality of single crystal semiconductor substrates; bonding the plurality of single crystal semiconductor substrates to the base substrate while the plurality of single crystal semiconductor substrates are arranged in the tray; separating the plurality of single crystal semiconductor substrates to form a plurality of single crystal semiconductor layers over the base substrate; thinning the plurality of single crystal semiconductor layers by etching; and irradiating the plurality of single crystal semiconductor layers with a laser beam, wherein the tray has a plurality of depressions for holding the plurality of single crystal semiconductor substrates, and wherein each of the plurality of depressions in the tray has a size which is within a region to be exposed to light of one shot of a reduced-projection light exposure apparatus.