Surface Acoustic Wave Devices for Consumer Use

Surface acoustic wave (SAW) devices have used in various applications for consumer use. The most significant success was realization of TV IF SAW filter. Since 1977, we have produced a total of 40 million TV IF SAW filters, and we began to provide SAW resonators for use in video cassette recorder RF convertors for the first time, in 1980.(l) These devices have been fabricated on X cut 112°rotated Y propagation (X-112Y) LiTaO3. (2) This substrate is moderate in coupling coefficient and temperature coefficient for these applications.