Patent ID: 8603837
Filing Date: 2013-12-10
Classification: H01L

Abstract:
1. A method for screening post gate etch clean processes in a combinatorial manner, the method comprising forming a dielectric layer disposed on a substrate; forming a metal-containing layer on the dielectric layer; forming a conductor layer on the metal-containing layer; patterning the conductor layer and the metal-containing layer to form metal gate stacks; defining site isolated regions on the substrate, wherein each site isolated region comprises at least one metal gate stack; applying chemicals to each of the site isolated regions, wherein the chemicals comprise at least hydrochloric acid and diluted sulfuric peroxide, wherein at least one of the composition or the application condition of the chemicals is varied in a combinatorial manner between the site isolated regions; and measuring a structural characteristic of the metal-containing layer in the metal gate stacks within each site isolated region.