Patent ID: 7932662
Filing Date: 2011-04-26
Classification: H03H,Y10T

Abstract:
1. A crystal device, comprising: a crystal frame comprising an outer frame and a crystal vibrating piece, the outer frame having a first surface and an opposing second surface, the crystal vibrating piece being coupled to and supported by the outer frame, and the crystal vibrating piece including excitation electrodes; a crystal base having a first surface and an opposing second surface, the first surface of the base being bonded to the second surface of the outer frame and including connection electrodes electrically connected to the excitation electrodes of the crystal vibrating piece, the connection electrodes also being electrically connected to respective external electrodes formed on the second surface of the base; and a crystal lid bonded to the first surface of the crystal frame; wherein the base defines respective through-holes that are electrically connected to respective connection electrodes and to respective external electrodes, the through-holes have at least one non-circular transverse profile, are filled with a sealing material, and have polygonal transverse profiles on the first and second surfaces of the crystal base, the polygonal transverse profile of the first surface of the base being different from the polygonal transverse profile of the second surface of the base.