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Piezoelectric sensor and pressure detection apparatus

  • US 9,864,450 B2
  • Filed: 05/21/2014
  • Issued: 01/09/2018
  • Est. Priority Date: 06/04/2013
  • Status: Active Grant
First Claim
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1. A piezoelectric sensor comprising:

  • an upper electrode;

    a lower electrode; and

    a piezoelectric layer interposed between the upper electrode and the lower electrode;

    at least one of the upper electrode and the lower electrode including a plurality of electrode patterns;

    the upper electrode including a plurality of first pattern electrodes extending in a first direction;

    the lower electrode including a plurality of second pattern electrodes extending in the same direction as that of the first pattern electrodes; and

    at least one of the following;

    a width of the first pattern electrodes becomes larger as the first pattern electrodes approach a peripheral portion of the piezoelectric layer; and

    a width of the second pattern electrodes becomes larger as the second pattern electrodes approach the peripheral portion of the piezoelectric layer.

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