Evaluation of Onium Salt Cationic Photoinitiators as Novel Dissolution Inhibitor for Novolac Resin

1 September 1988

journal article
Published by The Electrochemical Society in Journal of the Electrochemical Society

Vol. 135 (9) , 2322-2327
https://doi.org/10.1149/1.2096263

Abstract

Triarylsulfonium and diaryliodonium salts are a new class of dissolution inhibitors for novolac resins. These radio‐chemical acid generators are soluble in common casting solvents and are thermally very stable. Simple triphenylsulfonium and diphenyliodonium salts sensitive to deep UV inhibit the dissolution of novolac resins in aqueous base very efficiently and render the exposed areas more soluble in aqueous base, providing full development at 25 mJ/cm² of 254 nm radiation.

Keywords

DISSOLUTION
SALTS
CASTING
PHOTOINITIATORS
AQUEOUS
CATIONIC
NOVOLAC
THERMALLY
DIARYLIODONIUM
DIPHENYLIODONIUM

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