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Non-planar surface structures and process for microelectromechanical systems

  • US 7,527,996 B2
  • Filed: 04/19/2006
  • Issued: 05/05/2009
  • Est. Priority Date: 04/19/2006
  • Status: Expired due to Fees
First Claim
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1. A method of making a microelectromechanical system (MEMS) device, comprising:

  • providing a substrate;

    forming a sacrificial layer over the substrate;

    partially removing a portion of the sacrificial layer so as to form at least one void that extends through less than the entire thickness of the sacrificial layer, wherein the at least one void has a depth dimension in a range of about 100 angstroms to about 500 angstroms as measured perpendicular to the substrate;

    forming an electrically conductive layer over at least a portion of the sacrificial layer and the at least one formed void, thereby forming a non-planar interface between the electrically conductive layer and the sacrificial layer; and

    removing the sacrificial layer to form a cavity between the substrate and the electrically conductive layer.

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