Patent ID: 7005215

Claim:
A method of minimizing defects when fabricating a mask, the mask including a first layer and a second layer formed on the first layer, wherein the first layer provides a stop-etch for the second layer, the method comprising: forming a first photoresist layer on the second layer; exposing the first photoresist layer based on a first pattern including a plurality of shapes; developing the first photoresist layer, thereby defining critical dimensions of the plurality of shapes; etching the second layer, thereby transferring the pattern to the second layer; forming a second photoresist layer on the patterned second layer; exposing the second photoresist layer based on a second pattern associated with the first pattern, wherein the second pattern is substantially identical to or opposite that of the first pattern; developing the second photoresist layer; and re-etching the second layer, thereby removing a defect on the mask.