| abstract |
Provided is a photocurable inkjet ink capable of forming a cured film and a microlens having sufficient photocurability, excellent adhesion to a substrate, excellent light transmittance, and further excellent heat resistance. As a photocurable inkjet ink containing the (meth) acrylic acid ester (A) and photoinitiator (B) represented by following General formula (1), Said photoinitiator (B) is a photoinitiator whose absorbance in a wavelength range of 300 nm or more is 0.1 or less by UV absorption spectrum measurement of acetonitrile solution of 0.001 weight% of photoinitiator concentrations, The photocurable inkjet ink whose light transmittance in wavelength 400nm of the film | membrane after heat-processing the cured film (film thickness 2.0-3.0 micrometers) obtained by this ink for 100 hours at 70 degreeC is 98% or more. .... Formula (1) |