Patent ID: 7829428
Filing Date: 2010-11-09
Classification: H01L

Abstract:
1. A method for manufacturing a thin film resistor comprising the steps of: forming a first dielectric layer; forming a thin film resistor layer over the first dielectric layer; forming an end cap material layer over an end of the thin film resistor layer; forming a high selectivity film layer over the end cap material layer; forming a second dielectric layer over the first dielectric layer and over the high selectivity film layer and over the thin film resistor layer; applying a mask layer over the second dielectric layer; and etching a shallow via through the second dielectric layer and through the high selectivity film layer to the end cap material layer; wherein the high selectivity film layer is formed to have a thickness that is determined based on a difference in selectivity between the high selectivity film layer and the second dielectric layer.