Abstract: A photosensitive compound comprising at least one o-quinonediazide sulfonic acid ester of a phenolic compound, said esters selected from the group consisting of formula (II): ##STR1## wherein the photosensitive compound is used in a radiation sensitive composition and a process for forming a positive patterned image.

Abstract: A photosensitive compound comprising at least one o-quinonediazide sulfonic acid ester of a phenolic compound, said esters selected from the group consisting of formula (II): ##STR1## wherein the photosensitive compound is used in a radiation sensitive composition and a process for forming a positive patterned image.

Abstract: A radiation-sensitive composition comprising an admixture in a solvent of: at least one alkali-soluble binder resin, at least one photoactive compound and an effective sensitivity enhancing amount of at least one compound of formula (I): ##STR1## wherein each R is individually selected from the group consisting of hydrogen and a lower alkyl group having 1-4 carbon atoms and each n is 0, 1, or 2; the amount of said binder resin being about 60 to 95% by weight, the amount of said photoactive component being about 5% to about 40% by weight, based on the total solids content of said radiation-sensitive composition.

Abstract: A radiation-sensitive composition comprising an admixture in a solvent of: at least one alkali-soluble binder resin, at least one photoactive compound and an effective sensitivity enhancing amount of at least one compound of formula (I): ##STR1## wherein each R is individually selected from the group consisting of hydrogen and a lower alkyl group having 1-4 carbon atoms and each n is 0, 1, or 2; the amount of said binder resin being about 60 to 95% by weight, the amount of said photoactive component being about 5% to about 40% by weight, based on the total solids content of said radiation-sensitive composition.

Abstract: An alkali-soluble novolak binder resin made by the condensation reaction of a mixture of phenolic monomers with at least one aldehyde source, said phenolic monomers consisting of:(1) about 2-18% by weight of said mixture being 2,6-dimethylphenol;(2) about 55-75% by weight of said mixture being 2,3-dimethylphenol;(3) about 16-40% by weight of said mixture being a para-substituted lower alkyl phenol selected from the group consisting of 3,4-dimethylphenol, para-cresol, and para-cresol dimer;and the amount of said aldehyde source being at least a stoichiometric amount to react with all of said phenolic moieties. These novolak binder resins may be used in radiation-sensitive compositions useful as positive-working photoresists.

Abstract: A radiation sensitive mixture comprising an alkali-soluble binder resin and at least one photoactive compound comprising a compound of formula (I): ##STR1## wherein each R is individually selected from hydrogen and a lower alkyl group having 1 to 4 carbon atoms; n is either 0, 1, or 2; and D is selected from the group consisting of hydrogen or o-naphthoquinone diazide sulfonyl group; with the proviso that at least two D's are o-naphthoquinone diazide sulfonyl groups, and wherein the amount of said binder resin is about 70 to 95% by weight and the amount of photoactive compound being from about 5 to about 30% be weight, based on the total solids content of said content of said raditional-sensitive mixture.

Abstract: Block phenolic oligomers of the formula (I): ##STR1## These may be reacted alone or with selected phenolic monomers during or after the formation of a phenolic novolak resin thereby said resin having at least one unit of formula (II): ##STR2##

Abstract: A radiation-sensitive composition comprising an admixture in a solvent of: at least one alkali-soluble binder resin, at least one photoactive compound and an effective sensitivity enhancing amount of at least one compound of formula (I): ##STR1## wherein each R is individually selected from the group consisting of hydrogen and a lower alkyl group having 1-4 carbon atoms and each n is 0, 1, or 2; the amount of said binder resin being about 60 to 95% by weight, the amount of said photoactive component being about 5% to about 40% by weight, based on the total solids content of said radiation-sensitive composition.

Abstract: A radiation sensitive mixture comprising an alkali-soluble binder resin and at least one photoactive compound comprising a compound of formula (I): ##STR1## wherein each R is individually selected from hydrogen and a lower alkyl group having 1 to 4 carbon atoms; n is either 0, 1, or 2; and D is selected from the group consisting of hydrogen or o-naphthoquinone diazide sulfonyl group; with the proviso that at least two D's are o-naphthoquinone diazide sulfonyl groups, and wherein the amount of said binder resin is about 70 to 95% by weight and the amount of photoactive compound being from about 5 to about 30% be weight, based on the total solids content of said content of said raditional-sensitive mixture.

Abstract: A block copolymer novolak resin composition comprising at least one unit of the reaction product of an alkali-soluble phenolic polymer and a reactive ortho, ortho bonded oligomer having the formula: ##STR1## wherein x is from 2 to 7; wherein R is selected from hydrogen a lower alkyl group or lower alkoxy group having 1-4 carbon atoms and a halogen group; and Y.sub.1 is either a hydroxyl group; an alkoxy group or a halogen group; and Y.sub.2 is hydrogen, alkyl, alkoxy, halogen, hydroxyl, --CH.sub.2 OH, --CH.sub.2 -- halogen, or --CH.sub.2 -alkoxy group.

Abstract: A block copolymer novolak resin composition comprising at least one unit of the reaction product of an alkali-soluble phenolic polymer and a reactive ortho, ortho bonded oligomer having the formula: ##STR1## wherein x is from 2 to 7; wherein R is selected from hydrogen a lower alkyl group or lower alkoxy group having 1-4 carbon atoms and a halogen group; and Y.sub.1 is either a hydroxyl group; an alkoxy group or a halogen group; and Y.sub.2 is hydrogen, alkyl, alkoxy, halogen, hydroxyl, --CH.sub.2 OH, --CH.sub.2 -- halogen, or --CH.sub.2 --alkoxy group.

Abstract: Block phenolic oligomers of the formula (I): ##STR1## These may be reacted alone or with selected phenolic monomers during or after the formation of a phenolic novolak resin thereby said resin having at least one unit of formula (II): ##STR2##

Abstract: A process of developing an image-wise exposed photoresist-coated substrate comprising: coating a substrate with a positive working photoresist comprising an admixture of an alkali soluble binder resin and photoactive formula (V): ##STR1## wherein R.sub.2 is selected from the group consisting of an OD group, a halide group, a lower alkyl group having 1 or 4 carbon atoms and a lower alkoxy group having 1 to 4 carbon atoms, and D is selected from the group consisting of o-naphthoquinone diazide sulfonyl group and hydrogen; with the proviso that at least four D's are o-naphthoquinone diazide sulfonyl groups; subjecting the coating on the substrate to an image-wise exposure of radiation; and subjecting the image-wise coated substrate to a developing solution to remove the exposed areas of the radiation-exposed coating, leaving a positive image pattern.

Abstract: A trihydroxybenzophenone compound of the formula (I): ##STR1## wherein R.sub.1 is selected from the group consisting of hydroxyl group, halide group, a lower alkyl group having 1 to 4 carbon atoms, and a lower alkoxy group having 1 to 4 carbon atoms.

Abstract: Block phenolic oligomers of the formula (I): ##STR1## These may be reacted alone or with selected phenolic monomers during or after the formation of a phenolic novolak resin thereby said resin having at least one unit of formula (II): ##STR2##

Abstract: A trihydroxybenzophenone compound of the formula (I): ##STR1## wherein R.sub.1 is selected from the group consisting of hydroxyl group, halide group, a lower alkyl group having 1 to 4 carbon atoms, and a lower alkoxy group having 1 to 4 carbon atoms.

Abstract: A block copolymer novolak resin composition comprising at least one unit of the reaction product of an alkali-soluble phenolic moiety having at least two phenolic nuclei and at least two unsubstituted positions ortho and para to the hydroxyls in the moiety and a reactive ortho, ortho bonded oligomer having the formula: ##STR1## wherein x is from 2 to 7; wherein R is selected from hydrogen a lower alkyl group or lower alkoxy group having 1-4 carbon atoms and a halogen group; and Y.sub.1 is either a hydroxyl group; an alkoxy group or a halogen group; and Y.sub.2 is hydrogen, alkyl, alkoxy, halogen, hydroxyl, --CH.sub.2 OH, --CH.sub.2 -- halogen, or --CH.sub.2 -alkoxy group.

Abstract: A phenolic resin composition comprising units of formula (I): ##STR1## wherein R.sub.1 is a halogen and R.sub.2 is a lower alkyl group having 1 to 4 carbon atoms and said units of formula (I) are made by condensing the corresponding halogen-substituted resorcinol of formula (A): ##STR2## wherein R.sub.1 is defined above, with the corresponding para-lower alkyl-substituted 2,6-bis(hydroxymethyl)-phenol of formula (B): ##STR3## wherein R.sub.2 is defined above, and wherein the mole ratio of A:B is from about 0.5:1 to 1.7:1. This phenolic resin may be mixed with photoactive compounds (e.g. 1,2-napthoquinone diazide sensitizers) to prepare a light-sensitive composition useful in a method for forming a positive photoresist image.

Abstract: A trihydroxybenzopohenone compound of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of hydroxyl group, halide group, a lower alkyl group having 1 to 4 carbon atoms, and a lower alkoxy group having 1 to 4 carbon atoms.

Abstract: A trinuclear novolak oligomer of the formula (I): ##STR1## wherein each X is selected from the group consisting of hydroxyl group and halide group and Y is selected from the group consisting of a lower alkyl group having 1-4 carbon atoms and halogen atom.