Patent ID: 8883535
Filing Date: 2014-11-11
Classification: B81B,B81C

Abstract:
1. A method of fabricating a Microelectromechanical Systems (“MEMS”) device, comprising: forming an interconnect layer and an underlying dielectric layer on a substrate, the interconnect layer patterned to include at least one interconnect line; depositing a sacrificial layer over the interconnect layer; patterning the sacrificial layer to form a contact opening therein through which a portion of the interconnect line is exposed; forming a via opening extending through the sacrificial layer and into the substrate over which the sacrificial layer has been formed; depositing a body of electrically-conductive material over the sacrificial layer, into the contact opening, and into the via opening to simultaneously produce an unpatterned transducer layer, a contact integrally formed with the unpatterned transducer layer, and a via integrally formed with the unpatterned transducer layer, the unpatterned transducer layer electrically coupled to the interconnect line through the contact; patterning the unpatterned transducer layer to define, at least in part, a primary transducer structure having at least one movable component; removing at least a portion of the sacrificial layer to release the movable component of the primary transducer structure; thinning the substrate to reveal the via through a bottom surface of the substrate; and producing a backside conductor over the bottom surface of the substrate and electrically coupled to the via.