Japan Synthetic Rubber Co., Ltd.

Shinji Shiraki

Takao Miura

Yoshiji Yumoto

Hidetoshi Miyamoto

Toshiyuki Ota

A radiation sensitive resin composition useful as a negative type resist which can form a resist pattern having a good shape, has so high acid resistance as not to be affected by an etchant and a high adhesion to the substrate, and is endowed with so high a strippability as to be easily dissolved in a stripping solution consisting of an organoalkali. Said composition comprises (1) 100 parts by weight of an alkali-soluble novolak resin having a polystyrene reduced weight average molecular weight of 1,000 to 10,000, (2) 1 to 10 parts by weight of a compound having a methylol group and/or an alkoxymethyl group and being capable of cross-linking the alkali-soluble novolak resin (1) in the presence of an acid, and (3) 0.01 to 5 parts by weight of a radiation sensitive acid-generating agent represented by formula (I): ##STR1##

Radiation sensitive resin composition

A radiation sensitive resin composition which can be suitably used as a negative type resist having a high sensitivity, a high resolution, a high yield of residual film thickness and high thermal resistance, and which comprises (A) an alkali-soluble novolak resin, (B) a phenolic compound having a standard polystyrene-reduced weight average molecular weight of 10,000 or less such as polyvinylphenol, (C) a compound capable of cross-linking the component (A) and/or the component (B) in the presence of an acid, and (D) a radiation sensitive acid generator such as a triazine compound having a halomethyl group.

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Yokkaichi, Japan

Shinji Shiraki