Patent ID: 6960979

Claim:
A method for fabricating a resistor having a desired temperature coefficient of resistance and a total electrical resistance, the method comprising the steps of forming a polysilicon lay having: a first unsilicided resistor segment having a first electrical resistance and a negative temperature coefficient of resistance, and a second silicided resistor segment having a second electrical resistance and a positive temperature coefficient of resistance, the second segment electrically connected in series with the first segment, where the second electrical resistance is related to the first electrical resistance according to: R 1 R 2 =  TCR 2 TCR 1  , where R 1 is the first electrical resistance of the first resistor segment, R 2 is the second electrical resistance of the second resistor segment, TCR 1 is the negative temperature coefficient of resistance of the first resistor segment, and TCR 2 is the positive temperature coefficient of resistance of the second resistor segment.