Patent ID: 7897945
Filing Date: 2011-03-01
Classification: H01J,H01L

Abstract:
1. A method of making a lamina for fabricating a photovoltaic device, the method comprising: providing a semiconductor wafer; configuring an appliance to hold the wafer; configuring an ion source to supply hydrogen or helium ions in beam lets; installing the semiconductor wafer in the appliance; operating the ion source to generate a plurality of ion beamlets; directing the plurality of ion beam lets toward the appliance in a beam constituting a current of at least 20 mA of hydrogen or helium ions, thereby implanting the directed ion beam lets in the wafer at a depth defining a cleave plane; and annealing the wafer to effect cleaving of a lamina from the wafer at the cleave plane, the lamina being at least 1 μm thick and suitable for use in a photovoltaic device.