Patent ID: 9052332
Filing Date: 2015-06-09
Classification: G01P

Abstract:
1. A piezoresistive type Z-axis accelerometer, comprising: a substrate; a plurality of anchors formed over the substrate; a plurality of cantilever beams, wherein the cantilever beams comprise a plurality of dielectric layers and a piezoresistive material in one of the dielectric layers embedded within the cantilever beams; a proof mass, wherein the proof mass is suspended over the substrate by respectively connecting the proof mass with the anchors, and the accelerometer senses a movement of the proof mass by the piezoresistive material; and a support frame formed over the substrate and surrounding the anchors, the cantilever beams and the proof mass, wherein the anchors are integrated with the support frame, and the piezoresistive material is embedded in the cantilever beams and further extends into a portion of the support frame, and substantially all surfaces of the piezoresistive material are surrounded by the dielectric layers within the cantilever beams.