公开(公告)号：US10855247B2

公开(公告)日：2020-12-01

申请号：US16054929

申请日：2018-08-03

申请人： Akoustis, Inc.

发明人： Dae Ho Kim ,  Pinal Patel ,  Rohan W. Houlden ,  James Blanton Shealy ,  Jeffrey B. Shealy

IPC分类号： H03H9/02 ,  H03H9/13 ,  H03H9/17 ,  H03H9/56

摘要： An elliptical-shaped resonator device. The device includes a bottom metal plate, a piezoelectric layer overlying the bottom metal plate, and a top metal plate overlying the piezoelectric layer. The top metal plate, the piezoelectric layer, and the bottom metal plate are characterized by an elliptical shape having a horizontal diameter (dx) and a vertical diameter (dy), which can be represented as ellipse ratio R=dx/dy. Using the elliptical structure, the resulting bulk acoustic wave resonator (BAWR) can exhibit equivalent or improved insertion loss, higher coupling coefficient, and higher quality factor compared to conventional polygon-shaped resonators.