Patent ID: 9679844
Date: 2017-06-13
CPC Classifications: H01C,H01L

Claim:
1. A method for manufacturing a thin film resistor (TFR) after completing a Copper chemical mechanical polishing (CMP) process on a copper process module, the method comprising: depositing a dielectric barrier layer across at least two copper structures; depositing a second dielectric layer atop the dielectric barrier as a hard mask; patterning a trench into a photoresist layer using photo lithography; etching the trench through the hard mask and stopping in or on the dielectric barrier; removing any remaining photoresist from the photo lithography process; etching the trench through the dielectric barrier thereby exposing a copper surface for each of the at least two copper structures; and depositing thin-film resistor material into the trench and bridging across the resulting at least two exposed copper surfaces; wherein the top surface of the thin-film resistor material is aligned with the top surface of the at least two copper structures.