Patent ID: 8405202

Claim:
A micro-electro-mechanical-system (MEMS), comprising: a substrate; a sensor element formed on the substrate; an isolation structure configured to enclose a portion of the sensor element in a first cavity, the isolation structure including: a lid; and an isolation fence having a first surface attached to the lid to form the first cavity, the fence having an outer dielectric region that is configured to enclose an inner bonding region, the outer dielectric region having a dielectric inner side that forms a second surface of the fence that faces the first cavity, a dielectric bottom side that forms a third surface of the fence attached to the substrate, and a dielectric outer side that is positioned on an opposite side of the inner bonding region from the dielectric inner side and forms a fourth surface that faces away from the first cavity, the first surface of the fence being formed from a top surface of the dielectric inner and outer sides of the dielectric region and a top surface of the bonding region, the lid extends past the dielectric outer side of the dielectric region and over a second cavity, the lid having openings configured to enable access to the second cavity.