Patents Assigned to Roxburgh Limited
  • Patent number: 6091050
    Abstract: A micromachined platform structure includes a substrate having a major surface and a platform positioned over the major surface. Plural support beams are tethered between the substrate and the platform, with each support beam including at least a first layer exhibiting a first thermal coefficient of expansion (TCE) and a second layer with a second TCE, the first TCE greater than the second TCE. The first layer is deposited on the second layer at a temperature that is higher than an ambient temperature at which the platform is to be used. Thus, at the ambient use temperature, the first layer is in a contraction/tension state relative to the second layer and causes a flexure of the support beams and an elevation of the platform away from the substrate's major surface.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: July 18, 2000
    Assignee: Roxburgh Limited
    Inventor: William N. Carr