Patent ID: 9570358
Date: 2017-02-14
CPC Classifications: H01L

Claim:
1. A method comprising: depositing a sacrificial layer on a first dielectric layer over a substrate; applying a first patterning process to a first photoresist layer over the sacrificial layer to form a first opening, a second opening, a third opening and a fourth opening in the sacrificial layer; applying a second patterning process to a second photoresist layer over the sacrificial layer to form a fifth opening, a sixth opening, a seventh opening and an eighth opening in the sacrificial layer, wherein a distance between the fifth opening and the first opening is substantially equal to a distance between the second opening and the sixth opening; applying a third patterning process to a third photoresist layer over the sacrificial layer to form a ninth opening, a tenth opening, an eleventh opening and a twelfth opening in the sacrificial layer, wherein a distance between the ninth opening and the fifth opening is substantially equal to a distance between the tenth opening and the sixth opening; applying a fourth patterning process to a fourth photoresist layer over the sacrificial layer to form a thirteenth opening, a fourteenth opening, a fifteenth opening and a sixteenth opening in the sacrificial layer, wherein a distance between the ninth opening and the thirteen opening is substantially equal to a distance between the tenth opening and the fourteenth opening; and forming nanowires based on the sixteen openings, wherein the sixteen openings in the sacrificial layer are arranged in rows and columns.