Radiation imagery chemistry: process – composition – or product th – Diazo reproduction – process – composition – or product – Composition or product which contains radiation sensitive...
Patent
1996-05-31
1998-12-29
Chu, John S.
Radiation imagery chemistry: process, composition, or product th
Diazo reproduction, process, composition, or product
Composition or product which contains radiation sensitive...
430192, 430193, G03F 7023
Patent
active
058539492
ABSTRACT:
Provided are a method of synthesizing a highly pure polyphenol compound, which comprises (i) introducing at least one --CHRNR'R" group onto aromatic ring(s) of a phenol compound having from one to ten aromatic ring(s), wherein R represents a hydrogen atom, an alkyl group which may contain a hetero atom, a cycloalkyl group which may contain a hetero atom, an aralkyl group which may contain a hetero atom, or an aryl group, and R' and R", which may be the same or different, each represents an alkyl group which may contain a hetero atom, a cycloalkyl group which may contain a hetero atom, an aralkyl group which may contain a hetero atom, or an aryl group, and R' and R" may combine with each other to form a ring, (ii) converting the --CHRNR'R" group into a --CHRA group via one to three steps, wherein A represents a hydroxyl group, an alkoxy group, an acyloxy group, a halogen atom, a quaternary ammonium salt or a sulfonyloxy group, and (iii) condensing the thus converted phenol compound and a phenol compound, and a positive working photoresist composition using the polyphenol compound obtained by the aforementioned method.
REFERENCES:
patent: 2839586 (1958-06-01), Fritz
patent: 5178986 (1993-01-01), Zampini et al.
patent: 5407779 (1995-04-01), Uetani et al.
patent: 5541033 (1996-07-01), Blakeney et al.
Kodama Kunihiko
Momota Makoto
Chu John S.
Fuji Photo Film Co. , Ltd.
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