1. Soft I/O Interface Research Section; Smart I/O Platform Research Department; Information & Communications Core Technology Research Laboratory; Electronics and Telecommunications Research Institute; 218 Gajeongno Yuseong-gu Daejeon 34129 South Korea
2. Department of Organic Materials and Fiber Engineering; Soongsil University; 369 Sangdoro Dongjak-gu Seoul 06978 South Korea