Patent ID: 6577010
Filing Date: 2003-06-10
Classification: H01L

Abstract:
A structure comprising:a first layer of photoresist having a first opening therein having a first width; a second layer of photoresist different from the first layer of photoresist and disposed below the first layer of photoresist, the second layer of photoresist having a second opening coincident with the first opening and having a second width substantially equal to the first width of the first opening; a substrate whereon each of the first and second layers of photoresist are disposed, the substrate having a third opening coincident with the first and second openings, a top portion of the third opening having a third width which is substantially equal to the first and second widths of the first and second openings and a bottom portion of the third opening having a fourth width, the fourth width being less than the third width; and a barrier layer between the first layer of photoresist and the second layer of photoresist, the barrier layer having a fourth opening coincident with the first opening and the second opening and having a fifth width substantially equal to the first width of the first opening.