Patent ID: 7112535
Filing Date: 2006-09-26
Classification: H01L

Abstract:
1. A method for fabricating a precision polysilicon resistor comprising: providing a structure that includes at least one polysilicon resistor device region and at least one other type of device region, said at least one polysilicon resistor device region comprising a polysilicon layer; selectively performing an ion implant and an activation anneal in the at least one other type of device region forming at least one of an emitter of a bipolar transistor, a polysilicon gate of a field effect transistor or source/drain regions of said field effect transistor; subsequently, forming a protective dielectric layer overlying said polysilicon layer in said at least one polysilicon resistor device region; and subsequently, providing a predetermined resistance value to said polysilicon layer in said at least one polysilicon resistor device region.