ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The photochemistry of a negative working photoresist, MRL, composed of poly(4-hydroxystyrene) and an aromatic monoazide compound, 4-azido-4′-methoxychalcone, has been examined, The major products of photolysis of MRL films are primary amine, secondary amine, and poly(4-hydroxystyrene) with increased molecular weight. The polymeric secondary amines are generated from the nitrene insertion into the backbone carbon-hydrogen bonds of the polymer. Hydrogen abstraction from the polymer by the nitrene with subsequent polymer radical recombination results in the increase in the molecular weight of the poly(4-hydroxystyrene), rendering the exposed areas insoluble in both aqueous alkaline and organic developers. Rapid decrease in the dissolution rate of the poly(4-hy-droxystyrene) with increasing molecular weight is separately ascertained.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760261603
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