SURFACE ACOUSTIC WAVE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a surface acoustic wave device which has a wide bandwidth and is excellent in rectangularity ratio in a high frequency range in which the added mass effect of an Au or Cu electrode becomes conspicuous. SOLUTION: The cut angle of theθrotation Y-X substrate of LiTaO3 or LiNbO3 is optimized at an angle higher than that in the conventional practice with respect to the added mass of an Au or Cu electrode formed on a substrate surface.