Patent ID: 6504205
Filing Date: 2003-01-07
Classification: H01L

Abstract:
A metal capacitor with damascene structures, comprising:a first Cu wire and a second Cu wire disposed in a first insulator; a second insulator having an opening disposed on the first insulator, wherein the opening is positioned on the first Cu wire; a first metal layer conformally disposed in the opening and contacting the surface of the first Cu wire; a dielectric layer conformally disposed on the first metal layer in the opening; a second metal layer conformally disposed on the dielectric layer in the opening; a third insulator disposed on the second insulator and the second metal layer; a first Cu damascene structure and a second Cu damascene structure disposed in the second and third insulators, wherein the first Cu damascene structure is composed of a third Cu wire and a first Cu plug and the second Cu damascene structure is composed of a fourth Cu wire and a second Cu plug, wherein the second metal layer is connected with the third Cu wire through the first Cu plug, and the fourth Cu wire is connected with the second Cu wire through the second Cu plug; a first sealing layer disposed between the second Cu wire and the second insulator; and a second sealing layer disposed on the third and fourth Cu wires.