Patent ID: 8309297

Claim:
A method of lithographically patterning a substrate comprising photoresist which has removal areas and non-removal areas, the photoresist comprising an outer surface onto which incidence radiation passes into the photoresist, the method comprising: first exposing at least the non-removal areas to a single wavelength of radiation effective to increase outer surface roughness of a photoresist in the non-removal areas at least post-develop but ineffective to change a photoresist solubility in a developer for the photoresist to be cleared from the non-removal areas upon develop with the developer, the first exposing comprising impinging the single wavelength radiation onto the photoresist outer surface within the entirety of all of the non-removal areas; before or after the first exposing, second exposing only the removal areas to radiation effective to change the photoresist solubility in the developer for the photoresist to be cleared from the removal areas upon develop with the developer; and after the first exposing and the second exposing, developing the photoresist with the developer to clear the photoresist from the removal areas and to leave the photoresist in the non-removal areas that has outer surface roughness in the non-removal areas which is greater than that before the first exposing.