Patent ID: 8367451
Filing Date: 2013-02-05
Classification: B81B,B81C

Abstract:
1. A method for fabricating a suspended, tri-layer MEMS structure, the method comprising: providing a substrate; depositing a sacrificial layer on the substrate; depositing a first film layer on the substrate and over the sacrificial layer; depositing a second film layer on the first film layer; depositing a third film layer on the second layer; and removing the sacrificial layer by etching to suspend at least a portion of the tri-layer structure in a spaced-apart manner over the substrate; wherein depositing the sacrificial layer comprises identifying a stiffness of the substrate and of one or more of the first, second, and third film layers, and selecting a material for the sacrificial layer having a stiffness that is greater than the stiffness of the substrate and of the one or more of the first, second, and third film layers.