Abstract:
A MEMS microphone includes a silicon substrate defining an opening, a diaphragm being supported above the substrate and a backplate opposite from the diaphragm for forming a capacitor together with the diaphragm. The diaphragm includes a central vibrating portion and a plurality of serpentine segments extending from an edge of the vibrating portion. Each of the serpentine segments includes a first spring and a second spring symmetric to the first spring about an axis extending from a center of the vibrating portion. Each spring includes a first end connecting to the edge of the vibrating portion, a bending portion and a second end extending from the bending portion for anchoring the diaphragm to the substrate. The bending portion extends along a path having the same outline as that of the vibrating portion.
Abstract:
A method of fabricating a semiconductor device with back side conductive plugs is provided here. The method begins by forming a gate structure overlying a semiconductor-on-insulator (SOI) substrate. The SOI substrate has a support layer, an insulating layer overlying the support layer, an active semiconductor region overlying the insulating layer, and an isolation region outboard of the active semiconductor region. A first section of the gate structure is formed overlying the isolation region and a second section of the gate structure is formed overlying the active semiconductor region. The method continues by forming source/drain regions in the active semiconductor region, and thereafter removing the support layer from the SOI substrate. Next, the method forms conductive plugs for the gate structure and the source/drain regions, where each of the conductive plugs passes through the insulating layer.