1. K. Fukuda, T. Someya, X. Xu, S. Park, D. Kitazawa, S. Yamamoto, S. Shimomura, N. Watanabe, Photovoltaic power device, Japanese Patent Application No. 2017-181840, September 21, 2017. Submitted
2. K. Fukuda, X. Xu, S. Park, T. Someya, Electronic device and method of manufacturing, Japanese Patent Application No. 2017-179452, September 19, 2017. Submitted