3:15 PM - 3:30 PM △ [20p-B11-6] Production and optical emission spectroscopy ofradio frequency hollow cathode discharge plasmausing Ar/O2 mixed gas for high-speed ashing of polyimide film 〇Shinnosuke Honda1, Yasunori Ohtsu1, Yuta Ino1, Yuto Fukunaga1 (1.Saga Univ.)