received the B.S. degree in mechanical engineering from Pohang University of Science and technology(POSTECH), Pohang, Republic of Korea, in 2015. And he is currently pursuing the Ph.D. degree in POSTECH. His research interests include strain sensor, nano-crack analysis, and MEMS technology. His research is based within the Micro Electro Mechanical system, under the supervision of Dr. G. Lim. His research focus is the development of performance control of flexible strain sensor based on nano-crack control on the surface.