A process is disclosed for fabricating precision polysilicon resistors
which more precisely control the tolerance of the sheet resistivity of
the produced polysilicon resistors. The process generally includes
performing an emitter/FET activation rapid thermal anneal (RTA) on a
wafer having partially formed polysilicon resistors, followed by steps of
depositing a protective dielectric layer on the polysilicon, implanting a
dopant through the protective dielectric layer into the polysilicon to
define the resistance of the polysilicon resistors, and forming a
silicide.