Patent ID: 6255185
Filing Date: 2001-07-03
Classification: H01L

Abstract:
A method of controlling the resistance and tolerance of a polysilicon resistor, said method comprising the steps of:(a) providing a polysilicon resistor structure, said polysilicon resistor structure including at least a semiconductor substrate, a dielectric formed on said semiconductor substrate, and a doped polysilicon layer formed on said dielectric layer;(b) forming device regions in and/or on the structure provided in (a);(c) conducting a high temperature device activation anneal on said structure provided in (b), said high temperature device activation anneal is carried out at a temperature of about 800.degree. C. or above so as to provide active device regions in and/or on said structure; and(d) conducting a second annealing step, after said high temperature anneal, at a temperature less than about 800.degree. C. so as to cause an increase in resistance of said polysilicon resistor.