Patent ID: 8742373
Filing Date: 2014-06-03
Classification: C23C,H01J

Abstract:
1. A method to generate ions comprising: flowing a gas into a plasma chamber; forming a plasma from said gas in said plasma chamber using at least a first power to an ion source and a second power to said ion source; generating a first ion species at said first power and a second ion species at said second power, said first ion species and said second ion species being generated from said gas, wherein Said first ion species and said second ion species are each a molecular ion larger than said gas and wherein said first ion species and said second ion species each have a different formula; and implanting said first ion species and said second ion species into a workpiece, disposed in said plasma chamber, at two different energies using at least a first bias voltage and a second bias voltage, said first bias voltage applied to said workpiece while said first ion species are being generated at said first power, said second bias voltage applied to said workpiece while said second ion species are being generated at said second power, wherein said first bias voltage is different than said second bias voltage, such that said first ion species and said second ion species implant said workpiece at two different depths.