Patent ID: 7750322

Claim:
An ion implanter adapted to implant ions in semiconductor wafers, comprising: a. an appliance configured to hold the wafers; b. an ion source configured to generate ions at a rate; c. a mass analyzer, having a resolving power less than ten, configured to sort the ions according to their respective mass/charge ratios and further configured to direct selected ions toward the appliance in an ion beam; and d. voltage apparatus configured to apply a voltage drop of at least 250 kV between the ion source and the appliance, and further configured to propel ions toward the appliance, wherein the rate enables the selected ions to constitute a current of at least 20 mA in the ion beam, the mass analyzer is the only mass analyzer in the ion implanter, and the ion implanter is operable to implant ions in the wafers at a depth defining respective cleave planes at which respective laminae cleave from the wafers upon annealing, the laminae being at least 2 μm thick and suitable for fabricating a photovoltaic device.