Patent ID: 6291306
Filing Date: 2001-09-18
Classification: H01L

Abstract:
A method of forming a high polysilicon resistor over a dielectric layer, comprising the steps of:providing a polysilicon resistor over a semiconductor structure; said polysilicon resistor having a doped polysilicon layer having a first voltage coefficient of resistance and grain boundaries having a first trapping density;providing a first level of DC current for a first duration through said doped polysilicon layer to stress said doped polysilicon layer to partially melt said doped polysilicon layer without causing breakdown of said doped polysilicon layer; andremoving said first level of DC current to recrystallize said melted doped polysilicon layer, whereby said recrystallized doped polysilicon layer has a second voltage coefficient of resistance less than said first voltage coefficient of resistance and grain boundaries having a second trapping density that is less than said first trapping density.