Patent ID: 6426268
Filing Date: 2002-07-30
Classification: H01L

Abstract:
A method of fabricating thin film resistors (TFRs) at predetermined locations on an integrated circuit (IC) substrate, comprising:depositing a first dielectric layer over existing active devices on an IC substrate, patterning and etching said first dielectric layer to provide interconnection access to said existing active devices, depositing a layer of thin film material on said first dielectric layer, depositing a barrier layer on said thin film layer, depositing a first layer of metal on said barrier layer, patterning and etching said first layer of metal, said barrier layer, and said thin film material to form an isolated thin film/barrier/metal material stack at each predetermined TFR location and a first level of metal interconnections for said IC, removing the first layer of metal from each of said isolated TFR material stacks, and patterning and etching the barrier layer of each of said isolated TFR material stacks to provide respective openings which define the active areas of each of said TFRs.