Patent ID: 8003302

Claim:
A method for fabricating a pattern using a photomask, the method comprising: forming a primary photomask by forming a first light shielding pattern having a first pattern over a substrate, wherein the first pattern has an island pattern layout; transferring a corresponding first pattern onto a first region of a wafer by performing a first exposure process using the primary photomask; forming a first resist pattern aligned over the first light shielding pattern of the primary photomask; forming a phase shift region having a groove by selectively etching the exposed portion of the substrate using the first resist pattern and the first light shielding pattern as an etching mask; forming a second resist pattern that exposes a portion of the first light shielding pattern by reducing a line width of the first resist pattern; forming a second light shielding pattern having a reduced line width with respect to the first light shielding pattern by etching an exposed portion of the first light shielding pattern using the second resist pattern as an etching mask, wherein a portion of the substrate adjacent to the groove is exposed to form a rim region; removing the second resist pattern to form a secondary photomask having a second pattern, the second pattern comprising a light shielding region defined by the second light shielding pattern, the phase shift region, and the rim region; and transferring a corresponding second pattern onto a second region of the wafer by performing a second exposure process using the secondary photomask.