3:45 PM - 4:00 PM △ [16p-B1-9] Study on photo-electrochemical response property of AlGaN/GaN hetero-structure and its application to low damage etching technology 〇Yusuke Kumazaki1, Keisuke Uemura1, Taketomo Sato1 (1.RCIQE, Hokkaido Univ.)