Patent ID: 7863157
Filing Date: 2011-01-04
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of fabricating substrates for photovoltaic materials, the method comprising: providing a donor substrate, the donor substrate including a cleave region, a surface region, and a first thickness of silicon or germanium material defined between the cleave region and the surface region; transferring the first thickness of silicon or germanium material to a handle substrate surface region of a handle substrate to detach a portion of the donor substrate within a vicinity of the cleave region and to couple the surface region to the handle substrate surface region of the handle substrate to cause formation of a cleaved surface region overlying the first thickness of silicon or germanium material; supplying a gas including a silane and/or germane species into a reaction chamber; depositing material, using a process selected from at least glow discharge, plasma, photo-enhanced or thermal CVD and the silane and/or germane species, overlying the cleaved surface to thicken the first thickness of silicon or germanium material at a deposition rate equal to or greater than or less than a solid phase epitaxial re-growth rate of the material to crystallize the material overlying the first thickness of silicon or germanium material; and the method further comprising simultaneously depositing a second silicon material on a backside region of the handle substrate to form a first photovoltaic region on the handle substrate surface region and the backside of the handle substrate to respectively form a first photovoltaic material on the handle substrate surface region and a second photovoltaic material on the backside of the handle substrate.