Patent ID: 6428620
Filing Date: 2002-08-06
Classification: C25D,H01L,Y10S

Abstract:
A substrate processing apparatus for performing the anodizing step of anodizing a single-crystal silicon substrate in an electrolytic solution to form a porous silicon layer on a major surface of the single-crystal silicon substrate, the silicon film formation step of growing a single-crystal silicon film on the porous silicon layer, the bonding step of bonding a first substrate having the single-crystal silicon film to a second substrate as a supporting substrate so that the single-crystal silicon film is sandwiched between the first substrate and the second substrate; the removing step of removing a single-crystal silicon portion from a lower surface side of the first substrate to expose the porous silicon layer, and the etching step of etching the exposed porous silicon layer to remove the porous silicon layer on the single-crystal silicon film,wherein a plurality of first substrates can be processed at once in the anodizing step, and in washing after the anodizing step, all the first substrates can be transferred in a time in which each first substrate is removed from the electrolytic solution and exposed to the air until washing is limited to a range in which the porous silicon layer is prevented from remaining on the single-crystal silicon film in the etching step.