Patent ID: 7071099
Filing Date: 2006-07-04
Classification: H01L

Abstract:
1. A method of forming different back-end-of-line (BEOL) wiring for different circuits on the same wafer, the method comprising the steps of: providing a structure including a first circuit and a second circuit and at least two metal wire levels thereover; forming, in a first BEOL dielectric layer, a first dual damascene structure over the first circuit having a via opening width while forming a single damascene via structure over the second circuit having a width approximately twice that of the via opening width; forming a metal in the first dual damascene structure and the single damascene via structure; depositing a second BEOL dielectric layer including a cap layer; forming, in the second BEOL dielectric layer, a second dual damascene structure in contact with the metal of the first dual damascene structure and over the first circuit having a line wire opening width while forming a single damascene line wire structure in contact with the metal of the single damascene via structures and over the second circuit, the single damascene line wire structure having a width approximately twice that of the first line wire opening width; and forming a metal in the second dual damascene structure and the single damascene line wire structure.