| 摘要 |
PROBLEM TO BE SOLVED: To improve a characteristic to change an oscillation frequency even a little corresponding to a forward/backward direction in the case of packaging a crystal vibrator on a package circuit board. SOLUTION: The method is characterized in that at least one electrode terminal formed on the back of a piezoelectric component having a sealed container structure and electrode terminals by printing or on the back of the piezoelectric component by metallizing or soldering is changed in its shape or its size so that the direction indication of the piezoelectric component can be confirmed even from the back of the piezoelectric component.
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