Patent ID: 8535966
Filing Date: 2013-09-17
Classification: B81B,B81C,G06F,H01H

Abstract:
1. A method, comprising: forming a sacrificial metal layer at a same level as a wiring layer, in a first dielectric material; forming a metal switch at a same level as another wiring layer, in a second dielectric material; providing at least one vent to expose the sacrificial metal layer; removing the sacrificial metal layer to form a planar cavity, suspending the metal switch; capping the at least one vent to hermetically seal the planar cavity; forming a dual damascene trench and vias within the second dielectric material, surrounding the metal switch, and extending to the sacrificial metal layer; forming an upper sacrificial metal layer within the dual damascene trench and vias, which is in direct contact with the sacrificial metal; forming a third dielectric material over the upper sacrificial metal, wherein: