| abstract |
The present invention provides an adhesive composition containing an acryl copolymer, a photo-polymerizable monomer, a self-cleavage type photo-initiator, and a hydrogen drawing type photo-initiator, wherein in the adhesive composition, the stress relaxation ratio at 70°C after primary photo-curing at 600 mJ/cm 2 or less is 0.2 or smaller and, after the primary photo-curing, the stress relaxation ratio at 70°C after secondary photo-curing at 2,000 mJ/cm 2 or more increases to 0.2 or greater. The adhesive composition according to the present invention has excellent step-embedding properties and durability. |