Patent ID: 7790337
Filing Date: 2010-09-07
Classification: G03F

Abstract:
1. A photomask comprising a principal pattern made of a plurality of isolated transparent portions and formed in a light-shielding portion disposed on a transparent substrate having a transparent property against exposing light, wherein said principal pattern includes a first principal pattern and a second principal pattern adjacent to each other at a given distance, a first auxiliary pattern made of a phase shifter portion for transmitting the exposing light in an opposite phase to the exposing light passing through said transparent portion is formed between said first principal pattern and said second principal pattern, said first auxiliary pattern is provided such that a light intensity in a position corresponding to said first auxiliary pattern does not expose a resist, said transparent portions have a transmittance substantially equal to said transparent substrate, and a second auxiliary pattern made of a semi-light-shielding portion for partially transmitting the exposing light in the same phase to the exposing light passing through said transparent portion is formed on a side, opposite to said first auxiliary pattern, of at least one of said first principal pattern and said second principal pattern.