Patent ID: 7358029

Claim:
A photoresist composition, comprising: a polymer that is soluble in an aqueous alkaline developer; a photoacid generator; a dissolution modification agent characterized by the property of preventing dissolution of said polymer in said aqueous alkaline developer, said dissolution modification agent insoluble in said aqueous alkaline developer, said dissolution modification agent represented by at least one of the following structures: wherein each P 1 , P 2 , P 3 , P 4 , P 5 , P 6 , P 7 , P 8 and P 15 is independently selected from the group consisting of a structure V, a structure VI and a structure VII: wherein each R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 is independently selected from the group consisting of a hydrogen atom, a hydrocarbyl group having 4 to 12 carbon atoms, a substituted hydrocarbyl group having 4 to 12 carbon atoms, a heterohydrocarbyl group having 4 to 12 carbon atoms, and a substituted heterohydrocarbyl group having 4 to 12 carbon atoms; and wherein any two R 1 , R 2 , R 3 or any two R 4 , R 5 , R 6 may be linked to form a three to eight-membered cyclic group; and wherein said photoresist composition acts as a chemically amplified positive photoresist when exposed to radiation at a wavelength of 193 nm or less.