Patent ID: 7910268

Claim:
A method for fabricating a fine pattern in a photomask, comprising: forming a light shielding layer with a first thickness over a flat surface of a substrate; forming a first resist layer pattern over the light shielding layer to expose a portion of the light shielding layer with a first critical dimension; forming a groove by etching the portion of the light shielding layer exposed by the first resist layer pattern to a first depth, thereby forming a first light shielding layer having a first thickness and a second light shielding layer having a second thickness that is thinner than the first thickness; exposing an upper surface of the light shielding layer by removing the first resist layer pattern; forming a second resist layer pattern over the exposed light shielding layer to expose a half of the first light shielding layer and a half of the second light shielding layer; and forming a light shielding layer pattern by etching the exposed portion of the first and second light shielding layers, to remove the exposed second light shielding layer to expose the substrate with the exposed first light shielding layer remaining to cover the substrate.