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1. (WO2018142812) ACOUSTIC WAVE DEVICE, DUPLEXER, AND FILTER DEVICE

Pub. No.:    WO/2018/142812    International Application No.:    PCT/JP2017/046447
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Tue Dec 26 00:59:59 CET 2017
IPC: H03H 9/72
H03H 9/145
H03H 9/64
Applicants: MURATA MANUFACTURING CO., LTD.
株式会社村田製作所
Inventors: YASUDA, Junpei
安田 潤平
Title: ACOUSTIC WAVE DEVICE, DUPLEXER, AND FILTER DEVICE
Abstract:
The purpose of the present invention is to provide an acoustic wave device with which it is possible to suppress the occurrence of IMD, and that can be miniaturized. Provided is an acoustic wave device 1 in which an antenna terminal 3, a signal terminal, and a plurality of resonators S1, S2, P1, P2 are provided on a substrate 2 having piezoelectricity. The thickness of an electrode film of an IDT electrode of the resonator S1 closest to the antenna terminal 3 is the least among the thicknesses of the electrode films of the IDT electrodes of all the resonators, or the weight per unit area of the IDT electrode of the resonator S1 closest to the antenna terminal 3 is the least among the weights per unit area of the IDT electrodes for all the resonators.