Patent ID: 8932793
Filing Date: 2015-01-13
Classification: C08F,C08K,G03F,H01L

Abstract:
1. A method of forming a positive photoresist relief image, comprising: (a) applying on a substrate a layer of a photoresist comprising a photoactive component and a resin, the resin comprises a structure of the following formula wherein each Z is the same or different bridge unit; X comprises one or more alkyl, oxygen or sulfur atoms; each R AL is a moiety that comprises a photoacid-labile group; Y is a moiety that is distinct from the spaced phenolic group or moiety that comprises AL, and Y is selected from the group consisting of phenyl; phenyl substituted with halogen, cyano, alkyl or alkoxy; and an ester that does not undergo a photoacid-indueed cleavage reaction during exposing and developing of the photoresist layer; a, b and c are mole percents of the respective polymer units based on total repeat units in the polymer and a, b and c are each greater than zero; and (b) exposing and developing the photoresist layer to yield a relief image.