Patent ID: 6838216
Filing Date: 2005-01-04
Classification: G03F

Abstract:
1. A photolithographic mask for exposing a radiation-sensitive resist layer on a semiconductor substrate, comprising: a transparent carrier material; and a layer opaque to radiation disposed on said transparent carrier material; said layer opaque to radiation having a number of openings each with a square structure formed therein and forming a first pattern, said openings configured to be transferred into a resist layer during an exposure; and said layer opaque to radiation further having a further number of auxiliary openings formed therein and forming a second pattern, each of said auxiliary openings being assigned to a respective one of said openings and: said first pattern and said second pattern being a regular pattern; and said auxiliary openings having a length exceeding the resolution limit, a width exceeding the limiting dimension for the structure formation on the wafer, and an identical longitudinal alignment.