Resist pattern forming method and resist material

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making

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430326, 430328, 430330, G03C1/492

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active

059050160

ABSTRACT:
A polymer having a unit expressed as "--CH.sub.2 CHR--" as well as a substituent capable of being decomposed by acid is employed as a base resin for a resist material. The resist material is further mixed with an acid generator. A resist pattern obtained by selectively exposing and developing the resist material is irradiated with light having a wavelength of not more than 300 nm under a nitrogen atmosphere. Active hydrogen at the .alpha.-position of the unit dissociates as a result to form polymer radicals, which are linked with each other in progress of a crosslinking reaction. Namely, a crosslinked structure of the polymer is formed. Consequently, a resist pattern having high dry etching resistance is completed.

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patent: 5346803 (1994-09-01), Crivello et al.
patent: 5516626 (1996-05-01), Ohmi et al.
patent: 5556734 (1996-09-01), Yamachika et al.

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