Kabushiki Kaisha Suwa Seikosha

Matsushima Kogyo Kabushiki Kaisha

Joji Shimakawa

Masatoshi Kobayashi

Yukio Hara

Hiroyuki Fujii

A quartz crystal oscillator including a quartz crystal plate defining a tuning fork having a base, two vibratory tines extending from the base and a frame integrally extending from the base and surrounding the tines is provided. The quartz crystal plate is disposed between two cooperating case members in the region of the base and frame. Thin metallic electrodes are disposed on the opposed planar surfaces of the quartz crystal plate. A through-hole or opening is formed in the base region of the vibrator plate for electrically connecting an electrode from one planar surface of the plate to the opposed planar surface for providing two external terminals on one surface case member. The electrical connection through the through-hole or opening is a thin metal film disposed by sputtering or deposition.

Growing community of inventors

Nagano, Japan

Joji Shimakawa