PIEZOELECTRIC DEVICE APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a piezoelectric device apparatus which is sealed to a housing with excellent magnetic field shielding characteristics. SOLUTION: The piezoelectric device apparatus (100) includes: a first metal case (20) which has a ceiling part and a side wall part and is made of a first metal material; a second metal case (30) which has a ceiling part and a side wall part and covers the first metal case and is made of a second metal material different from the first metal material; a piezoelectric vibration piece (10) fixed to the inside of the first metal case; and a base plate (22) to which the first metal case and the second metal case are bonded. COPYRIGHT: (C)2010,JPO&INPIT