Patent ID: 7714672
Filing Date: 2010-05-11
Classification: H05K

Abstract:
1. A surface-mount crystal oscillator having a configuration where circuit elements including a crystal unit are arranged on a mounting board comprising external terminals, opening end faces of a concave metal cover are made to touch a surface of the mounting board, clearances from the opening end faces are comprised in central regions at both ends in a width direction of the metal cover, a plurality of protruding parts, which extend from the opening end faces and each of the plurality of protruding parts having a protrusion provided on an inner face, the plurality of protruding parts are comprised at both ends in a longitudinal direction of the metal cover, each of the plurality of protruding parts is elastically inserted in a corresponding groove provided on one of a plurality of side faces in the longitudinal direction of the mounting board and bonded by solder, wherein on each of the plurality of protruding parts, a tip side of the protrusion is thrust and bites into a metal film provided in the corresponding groove.