Patent ID: 7116039
Filing Date: 2006-10-03
Classification: H03H

Abstract:
1. A crystal unit, comprising: a crystal blank having a hole portion defined in at least one principal surface thereof, providing a vibrating region in a portion of the crystal blank which is made thinner by the hole portion; excitation electrodes disposed respectively on opposite principal surfaces of the crystal blank in said vibrating region; extension electrodes extending respectively from said excitation electrodes to respective first and second positions on an outer peripheral portion of said crystal blank; a casing; and a pillow member mounted on said casing, wherein said crystal blank has a single fixed end electrically and mechanically connected to said casing by eutectic alloy in said first position, wherein said crystal blank has a free end in said second position, said free end being placed on said pillow member, and wherein said extension electrodes are electrically connected to said casing by wire bonding in said second position.