Patent ID: 8507355
Filing Date: 2013-08-13
Classification: H01L

Abstract:
1. A manufacturing method of a high performance metal-oxide-metal capacitor device, which comprising: Step a: successively depositing an etch stopping layer and a first dielectric layer on a substrate; Step b: spin coating photo-resist over the first dielectric layer, and forming a pattern of a metal-oxide-metal region by photolithography; Step c: forming a metal-oxide-metal region groove by etching, so that the metal-oxide-metal region groove stops at the etch stopping layer, and then removing the photo-resist; Step d: depositing a second dielectric layer on the first dielectric layer, so that the second dielectric layer fulfills the metal-oxide-metal region groove; Step e: performing chemical mechanic polishing, preserving the second dielectric layer within the metal-oxide-metal region groove, and removing the remainder parts thereof, wherein an upper surface of the second dielectric layer within the metal-oxide-metal region groove and an upper surface of the first dielectric layer are on the same plane; Step f: forming a metal interconnection groove on the first dielectric layer by photolithography and etching, and simultaneously forming a metal-oxide-metal groove on the second dielectric layer; Step g: performing deposition of a copper diffusion barrier layer as simultaneously forming the metal interconnection groove and metal-oxide-metal groove, performing copper plating process filling all grooves for forming copper interconnection and then performing chemical mechanic polishing after that.