Theoretical analysis of SAW propagation characteristics under the strained medium and applications for high temperature stable high coupling SAW substrates

K. Yamanouchi, K. Kotani, I. I. Odagawa, Y. Cho

Research output: Contribution to conferencePaperpeer-review

Abstract

The important properties required for SAW substrates are a large electromechanical coupling coefficient (k2), small temperature coefficient of frequency (TCF), low propagation loss, etc. LiNbO3 and LiTaO3 have good properties as the SAW substrates with a large size. Unfortunately these possess the defect of large values of TCF. In this paper, SAW bonded composite substrates with a large k2, small TCF, low propagation loss and no dispersion using conventional bonders are investigated theoretically and experimentally. The propagation characteristics of SAW under the strained piezoelectric crystal using the higher-order elasticity theory have been analyzed. The theoretical results show zero TCT on LiNbO3/SiO3 substrates. The experimental results of LiNbO3/glass substrate showed TCF of 19ppm/ C. The propagation properties were almost the same as those of the single crystal.

Original languageEnglish
Pages471-474
Number of pages4
Publication statusPublished - 2000 Dec 1
Event12th IEEE International Symposium on Applications of Ferroelectrics - Honolulu, HI, United States
Duration: 2000 Jul 212000 Aug 2

Other

Other12th IEEE International Symposium on Applications of Ferroelectrics
CountryUnited States
CityHonolulu, HI
Period00/7/2100/8/2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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