Patent ID: 8426745
Filing Date: 2013-04-23
Classification: H01L,Y10T

Abstract:
1. A method for forming a semiconductor device, comprising: forming a conductive thin film resistor (TFR) layer having only one layer over a semiconductor substrate; forming a patterned non-conductive protective layer on the TFR layer at a plurality of first locations, wherein the patterned non-conductive protective layer is not formed at a plurality of second locations, and the plurality of first locations lie only between the plurality of second locations; forming a blanket conductive layer on the TFR layer at the plurality of second locations and on the patterned non-conductive protective layer; and etching the blanket conductive layer at the plurality of first locations and at the plurality of second locations to form a patterned conductive layer, wherein the TFR layer provides an underlayer directly in contact with the etched conductive layer at the plurality of second locations and directly in contact with the patterned non-conductive protective layer at all locations of the patterned non-conductive protective layer, and the underlayer underlies the etched conductive layer at the plurality of second locations and underlies the patterned non-conductive protective layer at the all locations of the patterned non-conductive protective layer.