Patent ID: 9551936
Date: 2017-01-24
CPC Classifications: G03F,H01L

Claim:
1. A method of modifying a surface of a photoresist material comprising: exposing the photoresist material to a developer solution comprising tetramethyl ammonium hydroxide, thereby generating a patterned photoresist material that is susceptible to pattern collapse cause by unbalanced capillary forces acting between pattern features; and thereafter, exposing the photoresist material to an aqueous ionic surfactant rinse solution comprising a perfluoroalkyl sulfonamide having Formula I: where R varying the pH of the aqueous ionic surfactant solution until a fluorochemical layer is formed in or on the photoresist material; wherein the aqueous ionic surfactant solution has a pH of within about 3 pH units of a pKa of the perfluoroalkyl sulfonamide.