Methods for extreme ultraviolet mask defect mitigation by multi-patterning
Abstract:
Methods for extreme ultraviolet (EUV) mask defect mitigation by using multi-patterning lithography techniques. In one exemplary embodiment, a method for fabricating an integrated circuit including identifying a position of a defect in a first EUV photolithographic mask, the photolithographic mask including a desired pattern and transferring the desired pattern to a photoresist material disposed on a semiconductor substrate. Transferring the desired pattern further transfers an error pattern feature to the photoresist material as a result of the defect in the first EUV photolithographic mask. The method further includes, using a second photolithographic mask, transferring a trim pattern to the photoresist material, wherein the trim pattern removes the error pattern feature from the photoresist material.
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