Patent ID: 8138007
Filing Date: 2012-03-20
Classification: B81C,G01P

Abstract:
1. A method for fabricating a microelectromechanical systems (MEMS) device isolated from a substrate comprising: forming a first anchor on said substrate; forming a second anchor in a central area on said substrate; forming a first structural layer on a first sacrificial layer overlying said substrate to produce first and second elements separated from one another by a trench; depositing a second sacrificial layer over said first structural layer, said second sacrificial layer at least partially filling said trench; creating an opening through said second sacrificial layer to expose a portion of said second element; forming a second structural layer over said second sacrificial layer to produce a third element, said second structural layer filling said opening to provide a junction between said second element and said third element; forming a compliant member between said first element and said first anchor; and suspending said first, second, and third elements over said substrate by removing at least portions of said first and second sacrificial layers, wherein said compliant member allows movement of said first element substantially parallel to a plane of said substrate, attachment of said second element with said substrate occurs only at said central area on said substrate relative to a location of said first, second, and third elements over said substrate, said second element being fixed to said second anchor so that said second element is immovable relative to said first element, and said third element is connected to said second element at least via said junction.