Patent ID: 6545393
Filing Date: 2003-04-08
Classification: H03H

Abstract:
A crystal unit comprising:a metallic base; a crystal blank having first and second principal planes; first and second excitation electrodes respectively formed in said first and second principal planes; a first extending electrode extending on said first principal plane from said first excitation electrode in a first direction toward an outer circumferential portion of said crystal blank; a second extending electrode extending on said second principal plane from said second excitation electrode in a second direction different from said first direction toward said outer circumferential portion of said crystal blank; first and second L-letter-shaped metallic brackets respectively electrically and mechanically connected to said first and second extending electrodes at said outer circumferential portion of said crystal blank; first and second lead wires constituted as hermetic terminals penetrating said metallic base and bonded respectively to the said first and second brackets; third and fourth L-letter-shaped metallic brackets mechanically connected, at positions different from connecting positions of said first and second brackets, to portions of said outer circumferential portion of said crystal blank, in which a naked surface of the crystal blank is exposed, said third and fourth brackets being interconnected to form an integral metallic holding member; and means for connecting said holding member to said metallic base.