Surface acoustic wave component for use in mobile communication terminal, has comb electrodes comprising length that amounts to specified percent or less than length of piezoelectric substrate in propagation direction of wave

摘要

The component has a carrier substrate connected with a piezoelectric substrate. The carrier substrate has a material with expansion coefficients. Comb electrodes (401, 402) are arranged on a surface of the piezoelectric substrate for exciting a surface acoustic wave (600). The comb electrodes comprise a length that amounts to 40 to 70 percent or less than a length of the piezoelectric substrate in a propagation direction of the wave.