| 摘要 |
PURPOSE: A photocurable inkjet ink with is provided to have enough photocurable property, excellent adhesion to a substrate and light transmittance, and to form a cured film and a micro lens with excellent heat durability. CONSTITUTION: A photocurable inkjet ink contains (meth)acrylic acid ester represented by chemical formula 1, and a photopolymerization initiator. The photopolymerization initiator has the absorbance of 0.1 or less in the wavelength of 300 nm or more measured by UV absorption spectrum of an acetonitrile solution with the photopolymerization initiator content of 0.001 weight%. The light transmittance of a cured layer in the wavelength of 400 nm after heat-treating the cured layer which is obtained by the ink(thickness 2.0-3.0 micron) at 70 °C for 100 hours is 90% or more. |
