ISSN:
1042-7147
Keywords:
Poly(vinyl alcohol)
;
Pyridinium ylide
;
Pyridiniobenzamidate
;
Negative photoresist
;
Photosensitive
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Poly(vinyl alcohol) (PVA) bearing N-(1-pyridinio)benzamidate (PB) was synthesized through acetalization of PVA and 4-dimethoxymethyl-N-(1-pyridinio)benzamidate (DMPB) in water. The PB groups in PVA-PB had almost the same proportion of DMPB to the starting PVA. The UV spectrum of PVA-PB shows an absorption band of pyridinium ylide as a shoulder around 300 nm in water, and as a maximum at 315 nm in a film on a quartz plate. These absorption bands decreased on irradiation at 313 nm. The photoreaction of the PVA-PB film proceeds much faster than that of PVA-PB in water. The solution, of PVA-bearing high-PB content, became slightly turbid during irradiation. After irradiation the film became insoluble in water, and the soluble fraction of polymer (P̄ = 1700) was 3% at a PB content of 1 mol% and less than 1% at that of more than 2 mol%. This polymer can be applied as a water-soluble negative photoresist.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pat.1993.220040806
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