Document Type and Number:
Japanese Patent JP4578176
Kind Code:
B2
Abstract:
To make a piezo-resonator, which is driven by using a SH type surface wave by an IDT, small in side and low in height while keeping P/V value large and also reduced in spurious.
The piezo-resonator is driven by forming the IDT (interdigital transducer) 3 composed of a comb-shaped electrode on a part of a principal plane of a piezoelectric substrate consisting mainly of PbTiO3or NaNbO3of a perovskite structure and using an SH type surface wave. The piezo-resonator is an ABO3type perovskite type multiple oxide obtained by especially replacing a portion of Pb of the PbTiO3 with at least one type among La, Nd, Gd, Sr, Ca and Ba and replacing at least a portion of Ti with Mn. When the number of moles of Pb to one mole of a B site constituent element is defined as (a) and the total number of moles of elements other than Pb among A site constituent elements is defined as (b), it is preferable that a value (p) represented by (a)/ä1-(b)} is 0. 90 to 1. 00.
COPYRIGHT: (C)2006,JPO&NCIPI
Inventors:
Fukuoka Shuichi
Tomonori Eguchi
Hiroyuki Kawamura
Application Number:
JP2004241377A
Publication Date:
November 10, 2010
Filing Date:
August 20, 2004
Assignee:
Kyocera Corporation
International Classes:
H03H9/25; H01L41/09; H01L41/187; H03H9/64
Domestic Patent References:
| JP4446730B2 | | | | |
| JP2002145666A | | | | |
| JP2000103670A | | | | |
| JP9321570A | | | | |
| JP2001240471A | | | | |
| JP11289237A | | | | |
| JP2000223989A | | | | |
| JP57009120A | | | | |
