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Yasuhiko NAKAGAWA Osamu KANBARA
The temperature-stable surface acoustic wave substrate consist of the ZnO/Pyrex glass is described. This substrate has the zero first-order temperature coefficient of the frequency, the very little phase velocity dispersion and the relatively high piezoelectric coupling constant. The raw material cost is also very low. We applied this substrate to the surface acoustic wave T.V. IF filter, and some excellent qualities were obtained.