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Semiconductor acceleration sensor

  • US 7,827,865 B2
  • Filed: 03/29/2006
  • Issued: 11/09/2010
  • Est. Priority Date: 03/30/2005
  • Status: Expired due to Fees
First Claim
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1. A semiconductor acceleration sensor, comprising:

  • a silicon wafer having a cross-shaped diaphragm formed within a wafer outer-circumferential frame section;

    a pedestal securing the wafer outer-circumferential frame section;

    one plumb bob disposed in a center of one surface of the diaphragm; and

    a plurality of beams extending, respectively, from the center of the surface of the diaphragm to the wafer outer-circumferential frame section along X axis and Y axis directions parallel to the surface of the diaphragm and orthogonal to each other,wherein the thickness of the beam along the X axis direction is different from the thickness of the beam along the Y axis direction, the thicknesses of each of beams are set according to maximum values of respective accelerations in the X axis and Y axis directions.

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