Search International and National Patent Collections

1. (WO2017033575) ELASTIC WAVE DEVICE

Pub. No.:    WO/2017/033575    International Application No.:    PCT/JP2016/069630
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Sat Jul 02 01:59:59 CEST 2016
IPC: H03H 9/25
H01L 23/28
Applicants: MURATA MANUFACTURING CO., LTD.
株式会社村田製作所
Inventors: NISHI, Hiroyuki
西 宏之
WATANABE, Kazushi
渡邉 一嗣
Title: ELASTIC WAVE DEVICE
Abstract:
Provided is an elastic wave device which has enhanced reliability, while being reduced in height. This elastic wave device 1 is provided with a sealing member 8 which seals first and second elastic wave elements 2A, 2B mounted on a mounting surface 3a, and which has first and second surfaces 8a, 8b, with the second surface 8b being provided with an engraved mark Z1. The first elastic wave element 2A comprises a first piezoelectric substrate 4A that is formed from LiNbO3, and the second elastic wave element 2B comprises a second piezoelectric substrate 4B that is formed from LiNbO3 or LiTaO3. The thickness of the first piezoelectric substrate 4A is larger than the thickness of the second piezoelectric substrate 4B. If the second surface 8b of the sealing member 8 faces upward and the first surface 8a faces downward, the thickness of the sealing member 8 positioned above the first piezoelectric substrate 4A is smaller than the thickness of the sealing member 8 positioned above the second piezoelectric substrate 4B. The first piezoelectric substrate 4A and the engraved mark Z1 do not overlap each other when viewed in plan from the second surface 8b.