Patent ID: 8080461

Claim:
A method of making a thin film resistor, comprising: (a) forming a doped region in a semiconductor substrate; (b) forming a first dielectric layer over the substrate; (c) forming a thin film resistor having contacts over the first dielectric layer; (d) forming a second dielectric layer over the thin film resistor; (e) forming a contact hole in the first dielectric layer, wherein the contact hole exposes the doped region; (f) forming a conductive liner on a sidewall and bottom portion of the contact hole; (g) planarizing the second dielectric layer to expose contacts of the thin film resistor; (h) performing a rapid thermal annealing on the thin film resistor and the conductive liner simultaneously; (i) filling the contact hole with a conductive material; and (j) forming a conductive contact connecting one of the contacts of the thin film resistor with the conductive material in the contact hole.