Patent ID: 9521491
Filing Date: 2016-12-13
CPC Classification: B81B,H01L,H04R

Claim Text:
1. A capacitive sensor comprising: a substrate having a cavity that is open at least at an upper surface; a vibrating electrode plate formed above the substrate so as to cover an upper portion of the cavity; a plurality of anchors that are arranged with a gap in an outer peripheral portion of the vibrating electrode plate and enable the vibrating electrode plate to be fixed to a stationary member; and a fixed electrode plate arranged so as to oppose the vibrating electrode plate, wherein in a view from a direction perpendicular to an upper surface of the substrate, an entire length of an outer edge of the vibrating electrode plate located between adjacent anchors is located outward of a tangent that circumscribes edges of the adjacent anchors on a side distant from a center of the vibrating electrode plate, and one or two or more openings are provided in regions of the vibrating electrode plate that are in a vicinity of the anchors.