Patent ID: 7105278
Filing Date: 2006-09-12
Classification: G03F

Abstract:
1. A semiconductor manufacturing method comprising: providing a semiconductor substrate having a photosensitive surface; providing a semiconductor pattern mask characterized by a first transmissivity to light, said semiconductor pattern mask comprising: a plurality of features in a dense nonuniform repetitive pattern on said mask for forming structures in a semiconductor pattern, said dense nonuniform repetitive pattern exhibiting three-fold symmetry, wherein: each feature in a first portion of said features is characterized by a second transmissivity to light, each feature in a second portion of said features is characterized by a third transmissivity to light, each feature in said second portion being different from each feature in said first portion, and features in said second portion of said features are selected to be located relative to features in said first portion of said features such that said three-fold symmetry of said dense nonuniform repetitive pattern is broken; exposing said photosensitive surface to light through said mask; and processing said exposed photosensitive surface to develop said structures on said semiconductor substrate.