ScholarWorks@숙명여자대학교

초록

Photosensitive silver pastes were developed using a mixture of spherical and flake-type silver particles for fine electrode patterns with high electrical conductivity, and the electrical characteristics were evaluated as a function of particle shape. The photosensitive silver pastes mixed up novolac epoxy-modified acrylate oligomer, acrylate monomer, and photoinitiator as a photocurable and alkali-developable binder resin composition, and silver spheres and flakes as conductive fillers. With a increase of silver loading amount the volume resistance decreased due to enhancement of packing density between the conductive fillers, where the conductive paste with 88 wt% silver sphere content showed 1.14× 10-4 Ω·cm. When the silver particles loading and sphere to flake ratio were 84 wt% and 8:2, the volume resistance exhibited 7.04×10-5 Ω·cm. This result was attributed to improvement of electrical contacts between silver spheres by flakes.