Development of double layered thickness-shear resonator using langasite-type piezoelectric single crystal

研究成果: Article査読

3 被引用数 (Scopus)

抄録

A novel device structure "double layered thickness-shear resonator" was proposed to improve the temperature characteristics of a bulk acoustic wave resonator. In order to design the double layered resonator, optimal combination of cut angles and thickness ratio of the substrates were determined from calculations using material constants and their temperature coefficients measured for a Ca3TaGa3Si2O14 (CTGS) single crystal. Based on the results, a double layered resonator was fabricated by directly bonding two CTGS substrates with cut angles of 122°Y and 171°Y under the thickness ratio of 0.248. As a result, the double layered resonator operated successfully at a fundamental mode of around 7.5 MHz like a normal resonator exhibiting temperature compensation effect. The mechanism of the deviation from the expected value observed in the measured temperature dependence of the frequency changes was discussed using the model of the wave propagation and the electric field generated in the double layer structure.

本文言語English
論文番号SKKC03
ジャーナルJapanese journal of applied physics
59
SK
DOI
出版ステータスPublished - 2020 7 1

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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