Nihon Dempa Kogyo Co., Ltd.

Tanaka Kikinzoku Kogyo K.k.

Shohei Takeda

Toshinori Ogashiwa

Hiroyuki Yamauchi

Takeyuki Sagae

Katsunori Akane

Takashi Terui

Masaaki Kurita

Kazuhiko Osawa

Kenzo Okamoto

Kenichi Ueki

An AT-cut crystal element is provided for reducing unnecessary vibration and for improving impedance of a resonator. Two side surfaces intersecting with a Z'-axis of a crystallographic axis of crystal are constituted of three surfaces of a first surface as an m-surface of quartz crystal, a second surface that intersects with the first surface and is other than the m-surface, and a third surface that intersects with the second surface and is other than the m-surface. Moreover, the second surface is a surface corresponding to a surface obtained by rotating a principal surface of the AT-cut crystal element by &#x2212;74&#xb1;3&#xb0; having an X-axis of crystal as a rotation axis, and the third surface is a surface corresponding to a surface obtained by rotating the principal surface by &#x2212;56&#xb1;3&#xb0; having the X-axis of the crystal as the rotation axis.

At-cut crystal element and crystal resonator

An electrode material capable of making more satisfactory the dispersion at the time of production and the aging property of a resonator than Au and capable of reducing the price as compared to Au. An resonator electrode material including a ternary alloy composed of Au and two metals Mand M, and being used as an excitation electrode to excite oscillation in a piezoelectric element, wherein the two metals Mand Mare, respectively, (a) metal M: a metal exhibiting a tendency to decrease the temporal frequency property (&#x394;f/f) from the reference value f, and (b) metal M: a metal exhibiting a tendency to increase the temporal frequency property (&#x394;f/f) from the reference value f. The metal Mis preferably at least any one of Ag, Al and Ni, and the metal Mis preferably at least any one of Pd, Ru, Pt, Ir, Rh and Cu.

Resonator electrode material excellent in aging property, piezoelectric resonator using the same material, and sputtering target made of the same material

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Sayama, Japan

Shohei Takeda