Patent ID: 7776494

Claim:
A method for fabricating a semiconductor device comprising the steps of: providing a semiconductor substrate; depositing a material layer overlying the semiconductor substrate; applying a layer of photosensitive material overlying the material layer; positioning a lithographic mask over the layer of photosensitive material, the mask comprising an optically transparent portion, an attPSM pattern that produces a phase shift of about 180°, and a phase shifted optically transparent portion having a first edge and a second edge, the first edge abutting the attPSM pattern and the second edge abutting the optically transparent portion; exposing the layer of photosensitive material to radiation passing through the mask to form selectively exposed portions of the layer of photosensitive material; developing the layer of photosensitive material to form a patterned layer overlying the material layer; and processing the material layer using the patterned layer as a process mask.