PHOTOSENSITIZER AND VISIBLE LIGHT PHOTOCURING RESIN COMPOSITION USING THE PHOTOSENSITIZER AND ITS USAGE

摘要

PROBLEM TO BE SOLVED: To provide a visible light sensitive resin composition having enough sensitivity to visible light region, especially, to second harmonics of He-Cd laser, argon laser, and YAG laser, excellent in storage stability, and capable of forming an excellent photosensitive layer for a visible light laser. SOLUTION: This photosensitizer contains at least an indolizine compound represented by formula (1) (wherein ring A represents an indolizine ring which may have a substituent, and X, Y, and Z show the meaning shown in the detailed description of the patent), and this visible light curing resin composition contains the photosensitizer.