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摘要

In one example, a method of forming a transistor above a silicon-on-insulator substrate comprised of a bulk substrate, a buried oxide layer and an active layer, the bulk substrate being doped with a first type of dopant material is disclosed. The method comprises performing a first ion implant process using a dopant material that is of a type opposite the first type of dopant material to form a first well region within the bulk substrate, performing a second ion implant process using a dopant material that is the same type as the first type of dopant material to form a second well region in the bulk substrate within the first well, the transistor being formed in the active layer above the second well, forming a conductive contact to the first well and forming a conductive contact to the second well.