Patent ID: 6103598
Filing Date: 2000-08-15
Classification: H01L

Abstract:
A process for producing a semiconductor substrate comprising providing a first substrate made of silicon having a porous silicon layer formed thereon by making the first silicon substrate porous, wherein said porous silicon layer contains pores having inner walls, and a nonporous monocrystalline silicon layer epitaxially grown on the porous silicon layer, laminating the first substrate onto a second substrate in a state that at least one of lamination faces of the first and the second substrates has a silicon oxide layer and the nonporous monocrystalline silicon layer is interposed between the laminated substrates, removing any of said first silicon substrate which remains, and removing the porous silicon layer by etching, wherein the porous silicon layer is removed by etching with an etching solution, wherein the nonporous monocrystalline silicon layer and the silicon oxide layer may be etched at respective etching rates of not more than 10 angstroms per minute by the etching solution.