“…2,3 However, the application of UV curing has been severely limited by the low curing depth, color blocking effect and complicated shape of products. Therefore, in the past few years, to synergistically achieve high curing efficiency and sufficient curing of resins, the UV-thermal dual-curing technique [4][5][6] has been proposed and applied for opaque materials, complex substrates, super-thick coatings and colored coatings. Cycloaliphatic epoxy resin (CAE) 7,8 is one of the most used UV-cured resins, which has been widely used in semiconductor sealants, LED encapsulation adhesives, bottom filler adhesives and coatings due to its unique advantages such as good dielectric property, small deformation shrinkage, favorable dimensional stability, high heat resistance and excellent weather resistance.…”