Design and simulation of novel decoupled microgyroscopes with trench isolation

In this paper, a novel decoupled microgyroscopes was designed and simulated. The device named as MS-Gyro is partially decoupled structure. The trench isolation technology is introduced in new design. The new design consists of drive frame, sense frame, movable sense electrode, springs and isolation connection. The movable sense electrodes connect with the drive frame directly and are isolated from drive frame electrically. The ANSYS™ software has been used to simulate two types of decoupled microgyroscopes. A comparison has also been made between new design and conventional partially decoupled (CPD) design. The natural frequencies of drive and sense modes of two designs are 8562 Hz and 8598 Hz for MS-gyro, 8522 Hz and 8588 Hz for CPD Gyro, respectively. The results show that the MS-gyro suppresses quadrature-error effect better than CPD gyro.