Patent ID: 7901866

Claim:
A pattern forming method, comprising: a step of forming a photosensitive organic material layer by providing, on a substrate, a photosensitive organic material which is protected by a hydrophobic photodegradable group and is capable of generating a hydrophilic group selected from the group consisting of amino group, hydroxyl group, carboxyl group, and sulfo group by light irradiation; a step of selectively exposing the photosensitive organic material layer to light in a pattern to generate the hydrophilic group at an exposed portion; a step of providing a block polymer having a hydrophilic segment and a hydrophobic segment, on the photosensitive organic material layer after the exposure, to separate segments of the block polymer into the hydrophilic segment at a portion where the hydrophilic group generated by the exposure is present and the hydrophobic segment at a portion where the hydrophilic group is not present; and a step of removing one of the separated segments to form a pattern of the other segment, wherein the photosensitive organic material is a photosensitive silane coupling agent (A) which is protected by a hydrophobic photodegradable protecting group and is capable of generating a hydrophilic group selected from the group consisting of amino group, hydroxyl group, carboxyl group, and sulfo group, wherein the photosensitive organic material generates amino group, hydroxyl group, carboxyl group, or sulfo group by the exposure, and wherein the photosensitive silane coupling agent (A) is a photosensitive silane coupling agent (A1) represented by the following formula (1): wherein X represents a divalent group selected from the group consisting of polymethylene group partially having hydrogen atom optionally substituted with fluorine atom or alkyl group, phenylene group partially having hydrogen atom optionally substituted with fluorine atom or alkyl group, naphthylene group partially having hydrogen atom optionally substituted with fluorine atom or alkyl group, and a divalent group having a linked structure of a plurality of these groups; at least one of R1, R2, and R3 represents alkoxy group or halogen atom and the remainder of R1, R2 and R3 is selected from the group consisting of alkoxy group, halogen atom, alkyl group, and hydrogen atom; R4 represents hydrogen atom or alkyl group; R5, R6, R7, and R8 are selected from the group consisting of nitro group, hydrogen atom, halogen atom, alkyl group, alkyl group containing hydrogen atoms partially or entirely substituted with fluorine atom, and alkoxy group containing hydrogen atoms partially or entirely substituted with fluorine atom; and R9 represents hydrogen atom or alkyl group.