Patent ID: 8084186
Filing Date: 2011-12-27
Classification: G03F,H01L,Y10T

Abstract:
1. A process for forming a reverse tone image on a device comprising; a) optionally, forming an absorbing organic underlayer on a substrate; b) forming a coating of a photoresist over the underlayer; c) forming a photoresist pattern having a width of the photoresist feature (D d) forming a polysilazane coating over the photoresist pattern from a polysilazane coating composition, where the polysilazane coating is thicker than the photoresist pattern, and further where the polysilazane coating composition comprises a silicon/nitrogen polymer and an organic coating solvent; e) etching the polysilazane coating to remove the polysilazane coating at least up to a level where the top of the photoresist pattern is revealed; and, f) dry etching to remove the photoresist and the underlayer which is beneath the photoresist, thereby forming an opening (D further where the shrinkage%, {(D 1 -D 2 )/D 1 }*100, is in a range from about 5 to about 80.