Daishinku Corporation

Susumu Hirao

Minoru Iizuka

Tatsuya Murakami

Yoshikiyo Ogasawara

Hiroyuki Ishihara

Akihiro Mori

A quartz oscillator device of the present invention comprises a quartz oscillating plate having two major surfaces, each of which is formed with an excitation electrode and lead electrodes drawn out of the excitation electrode, and electrode pads formed on a base, wherein the quartz oscillating plate and the electrode pads are electrically connected via a silicone-based conductive adhesive. Among the excitation electrode and the lead electrodes, at least each of the lead electrodes comprises a Cr film layer, a Au film layer, and a thin Cr film layer or a thin Ag film layer, which are laminated on the quartz oscillating plate in this order. In addition, each electrode pad comprises a metallized layer made of tungsten or molybdenum, a Ni film layer and a Au film layer, which are laminated on the base in this order; and Ni in the Ni film layer is diffused at least into a predetermined area of the Au film layer in each electrode pad where the silicone-based conductive adhesive is applied.

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Hyogo, Japan

Susumu Hirao