Quartz crystal device and method for fabricating the same
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United States of America Patent
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Apr 4, 2017
Grant Date -
Dec 11, 2014
app pub date -
May 30, 2014
filing date -
Jun 10, 2013
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Abstract
A surface mount type quartz crystal device includes a quartz crystal vibrating piece and a base plate. The quartz crystal vibrating piece is configured to vibrate at a predetermined frequency. The base plate is made of a crystal or a glass. The base plate includes an external electrode disposed on a bottom surface of the base plate to mount the quartz crystal device. The quartz crystal vibrating piece is placed on an opposite surface of the bottom face. The external electrode includes a metal film formed on a surface of the base plate by sputtering, and an electroless plating film formed on a surface of the metal film by electroless plating. The electroless plating film includes a nickel layer including lead and bismuth.
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