CRYSTAL OSCILLATION PIECE, MANUFACTURING METHOD THEREFOR, CRYSTAL DEVICE USING CRYSTAL OSCILLATION PIECE AND PORTABLE TELEPHONE SYSTEM/ELECTRONIC UNIT USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a crystal oscillation piece which does not adversely affect an oscillation characteristic by suppressing oscillation to a thickness direction of the crystal oscillation piece and to provide a manufacturing method of the piece, a crystal device using the crystal oscillation piece and portable telephone set/electronic unit using the crystal device.;SOLUTION: The whole crystal oscillation piece is formed of a crystal and it is provided with a base part and a pair of oscillation arms 34 and 35 extending in parallel from the base part. Projections or projection bars 66 and 66 are formed on faces opposite to faces where abnormal shapes 65 and 65 are formed in accordance with the abnormal shapes formed in the respective oscillation arms by anisotropy of the crystal.;COPYRIGHT: (C)2004,JPO