| 摘要 |
A layer of a liquid composition containing (A) a compound containing at least one heat-polymerizable, ethylenically-unsaturated group, (B) a photopolymerizable material, and (C) a thermally-activated free radical initiator for polymerization of (A), is heated to solidify the layer, and subsequently it is exposed to actinic radiation in a predetermined pattern and those parts of the layer that have not become photopolymerized are removed by treatment with a suitable solvent. An example of an unsaturated, heat polymerizable compound (A) is butanediol dimethacrylate. An example of a photopolymerizable material (B) is an epoxidized novolak of 2,2-bis(4-hydroxyphenyl)propane with triphenylsulfonium hexafluorophosphate. A typical thermally-activated, free radical initiator (C) is cumene hydroperoxide. The process is suitable for the manufacture of printing plates and printed circuits. |
