PIEZOELECTRIC DEVICE AND ACOUSTO-ELECTRIC TRANSDUCER AND METHOD FOR MANUFACTURING THE SAME

Title:

PIEZOELECTRIC DEVICE AND ACOUSTO-ELECTRIC TRANSDUCER AND METHOD FOR MANUFACTURING THE SAME

Document Type and Number:

WIPO Patent Application WO/2002/007234

Kind Code:

A1

Abstract:

A lens-line type piezoelectric device thinner than the manufacture limit thickness, which is conventionally difficult to manufacture, and a method for manufacturing the same. The piezoelectric device has a vibrating part of at least two steps where one side thereof is planar and the opposite side is thickest at the peripheral holding portion and thinner toward the central portion. A piezoelectric element of another mode has a vibrating portion of at least two steps where the peripheral holding portion is thickest on both sides and the thickness decreases toward the central portion. In these piezoelectric devices, at least at least one side of the thinnest central portion of the vibrating part has a convex lens shape. A pair of electrodes are vacuum deposited in the center these vibrating parts on both sides, and a gold wire is led as a lead wire from each electrode.

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Inventors:

NAGAURA YOSHIAKI (JP)

Application Number:

PCT/JP2001/006128

Publication Date:

January 24, 2002

Filing Date:

July 16, 2001

Export Citation:

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Assignee:

NAGAURA KUMIKO (JP)
NAGAURA ZENICHIRO (JP)
NAGAURA YOSHIAKI (JP)

International Classes:

H01L41/22; H01L41/337; H03H3/02; H03H9/02; H03H9/13; H03H9/19; (IPC1-7): H01L41/09; H01L41/22; B23Q3/08; H03H3/02

Foreign References:

JPS4883753A	1973-11-08
JPS5371595A	1978-06-26
JPS4834494A	1973-05-18
US3617780A	1971-11-02
JPS60170312A	1985-09-03
JP2000317782A	2000-11-21

Attorney, Agent or Firm:

Kato, Hisashi (Asaco-Hakata Bldg. 11-5 Hakataekihigashi 1-chome Hakata-k, Fukuoka-shi Fukuoka, JP)

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