Radiation imagery chemistry: process – composition – or product th – Diazo reproduction – process – composition – or product – Composition or product which contains radiation sensitive...
Reexamination Certificate
2005-07-26
2005-07-26
Chu, John S. (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Diazo reproduction, process, composition, or product
Composition or product which contains radiation sensitive...
C430S270100, C430S313000, C430S317000, C430S324000, C430S905000, C438S778000, C438S780000, C438S781000, C438S782000
Reexamination Certificate
active
06921621
ABSTRACT:
The present invention provides a resist composition comprising (A) polyhydroxystyrene in which at least a portion of hydrogen atoms of hydroxyl groups are substituted with an acid-dissociable dissolution inhibiting group, and the solubility in an alkali solution of the polyhydroxystyrene increasing when the acid-dissociable dissolution inhibiting group is eliminated by an action of an acid, and (B) a component capable of generating an acid by irradiation with radiation, wherein a retention rate of the acid-dissociable dissolution inhibiting group of the component (A) after a dissociation test using hydrochloric acid is 40% or less, and also provides a chemical amplification type positive resist composition which contains polyhydroxystyrene in which at least a portion of hydrogen atoms of hydroxyl groups are substituted with a lower alkoxy-alkyl group having a straight-chain or branched alkoxy group, and the solubility in an alkali solution of the polyhydroxystyrene increasing when the lower alkoxy-alkyl group is eliminated by an action of an acid, in place of the component (A).
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Matsumi Tatsuya
Mimura Takeyoshi
Nitta Kazuyuki
Okubo Waki
Shimatani Satoshi
Chu John S.
Hoffmann & Baron , LLP
Tokyo Ohka Kogyo Co. Ltd.
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