Patent ID: 8939023
Filing Date: 2015-01-27
Classification: G01C,G01P

Abstract:
1. An inertial sensor, comprising: a plate-shaped membrane on which a hole penetrating in a thickness direction is formed; a mass body that is disposed at the membrane; and a post that is disposed at the membrane to support the membrane; a driving unit disposed on the membrane, wherein a piezoelectric material, driving electrodes and sensing electrodes are disposed on one surface of the membrane, the piezoelectric material is partitioned into a first annular region surrounding a center of the membrane and a second annular region surrounding the first annular region, the driving electrodes divided into annular regions in an arc shape are formed in the second annular region, the sensing electrodes divided into annular regions in an arc shape are formed in the first annular region, and the hole is formed between at least two driving electrodes or at least two sensing electrodes.