Patent ID: 6335269
Filing Date: 2002-01-01
Classification: H01L

Abstract:
A method of producing a semiconductor substrate comprising a non-porous monocrystalline layer on a porous silicon layer, which comprises, before a step of forming the non-porous monocrystalline layer on the porous silicon layer, a step of heat-treating the porous silicon layer in an atmosphere not containing a source gas of the non-porous monocrystalline layer, such that the etched thickness of silicon due to the heat treatment is not more than 2 nm and that a rate of change r for Haze values of the porous silicon layer surface before and after the heat treatment defined by (the Haze value of the porous silicon layer surface after the heat treatment)/(the Haze value of the porous silicon layer surface before the heat treatment) is in a range wherein 1&lE;r&lE;3.5.