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A water‐soluble, reciprocity‐law‐failing photoresist
Author(s) -
Akagi Motoo,
ogaki Saburo,
Kohashi Takahiro,
Oba Yoichi,
Oikawa Mitsuru,
Tomita Yoshifumi
Publication year - 1977
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760170604
Subject(s) - photoresist , reciprocity (cultural anthropology) , materials science , fabrication , polymer , polyvinylpyrrolidone , photochemistry , oxygen , polymer chemistry , chemical engineering , polymer science , chemistry , organic chemistry , nanotechnology , composite material , medicine , psychology , social psychology , alternative medicine , layer (electronics) , pathology , engineering
For the purpose of obtaining a water‐soluble, reciprocity‐law‐failing photoresist, a study was made on the photo‐crosslinking properties of various systems composed of water‐soluble polymers and bisazides. Reciprocity‐law‐failing photoresists are suitable for use in the fabrication of black matrix color picture tubes without any alteration in the shadow mask. As a result, a system containing polyvinylpyrrolidone, polyacrylamide, and 4, 4′‐diazidostilbene‐2, 2′‐disulfonic acid disodium salt was found to show a significant reciprocity‐law‐failing property in the range of light intensity used practically in black matrix fabrication. The mechanism of the photo‐cresslinking reaction of this photoresist was investigated. It is suggested that the bisazide decomposes to liberate a reactive dinitrene intermediate. This photodecomposition was found to proceed reciprocally. The nitrene reacts with polymer molecules to form a water‐insoluble three dimensional network. If, however, oxygen is present, this crosslinking reaction is inhibited by a preferential reaction between dinitrene and oxygen. By this oxygen effect, this photoresist reveals significant reciprocity‐law‐failing characteristics.