Control of Surface Free Energy for Surface Modification by using Photo-curable Resin and Surface Modifier

We studied the surface modification technology using photosensitive material for control of surface free energy. This photosensitive material is composed of both photo-curable resin and surface modifier. The surface modification phenomena can be controlled by the medium having different surface free energy. In the medium of the high surface free energy, such as water, photosensitive material is modified to be high surface free energy after curing. Whereas, in the medium of the low surface free energy such as air, photosensitive material is modified to be low free surface energy. We calculated surface free energy and analyzed chemical composition of surface by ESCA. As a result, we explained that these surface modification phenomena were caused by the migration of surface modifier into photo reactive resin. Finally, we applied these surface modification phenomena to precision printing technology and micro processing technology in order to fabricate optical devices.