13:30 〜 15:30 ▲ [17p-PB01-4] Effect of addition of elements in group IVB (C, Si, Ge, Sn) on polarity inversion of Scandium Aluminum Nitride (ScAlN) piezoelectric thin films 〇Sri Ayu Anggraini1、Masato Uehara1、Kenji Hirata1、Hiroshi Yamada1、Morito Akiyama1 (1.AIST)