Patent ID: 8394571

Claim:
A method of forming an electronic device, comprising: (a) providing a semiconductor substrate comprising one or more layers to be patterned; (b) applying a first layer of a photosensitive composition over the one or more layers to be patterned, wherein the first photosensitive composition comprises a first resin component and a photoactive component; (c) exposing the first layer to activating radiation through a patterned photomask; (d) developing the exposed first layer to form a resist pattern; (e) heat treating the resist pattern in a hardbake process; (f) treating the hardbaked resist pattern with a material effective to make alkaline a surface of the resist pattern; (g) applying a second layer of a thermally sensitive composition in contact with the alkaline surface of the resist pattern, the second composition comprising a second resin component and a thermal acid generator; (h) heating the second layer of the thermally sensitive composition to a temperature effective for the thermal acid generator to generate an acid; and (i) developing the heated second layer.