US Patent 7244389 Method of manufacturing piezoelectric ceramics

Patent 7244389 was granted and assigned to Kyocera Corporation on July, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Kyocera Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7244389

Date of Patent

July 17, 2007

Patent Application Number

10722157

Date Filed

November 25, 2003

Patent Primary Examiner

‌

Carlos Lopez

Patent abstract

The present invention provides piezoelectric ceramics having a thickness of 100 μm or less, surface flatness of 20 μm or less and maximum surface uneveness of 3 μm or less in arbitrary surface region, wherein in-plane variation in dielectric constant is 5% or less of an average dielectric constant. The piezoelectric ceramics are applied to an actuator used for a painting head because of small surface flatness and less in-plane variation in piezoelectric constant.