Patent ID: 9472609
Filing Date: 2016-10-18
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a polysilicon resistor with a selected temperature coefficient of resistance (TCR), the method comprising: selecting a sheet resistance for the polysilicon resistor, the selected sheet resistance being related to a selected film thickness of the polysilicon resistor; selecting a dose level for a grain size modulating species (GSMS) for modulating an average grain size of grains of the polysilicon resistor; creating a look-up table including a plurality of TCR values associated with a corresponding GSMS dose level; selecting the TCR for the polysilicon resistor, the TCR being related to a selected average grain size of the polysilicon, wherein the selecting of the TCR for the polysilicon resistor includes selecting the TCR from the look-up table after the creating of the look-up table; and forming the polysilicon resistor on a substrate, the polysilicon resistor having the selected sheet resistance, the selected GSMS dose level and the selected TCR.