Patent ID: 7388320

Claim:
A crystal unit comprising: a crystal blank in which a depression having a reduced thickness is formed in at least one principle surface thereof, wherein a region of the depression serves as a vibration region; first and second excitation electrodes formed on the principle surfaces, respectively, in the vibration region; a first extending electrode provided on one of the principle surfaces and extending from the first excitation electrode toward an outer periphery of the crystal blank; a second extending electrode provided on the other principle surface and extending from the second excitation electrode toward the outer periphery of the crystal blank; and a receptacle body, wherein the crystal blank has a single fixed end which is electrically and mechanically fixed to the receptacle body at a single point by bonding the first extending electrode to the receptacle body via an eutectic alloy in the vicinity of the outer periphery of the crystal blank, said crystal blank being mechanically supported only at the single point by the eutectic alloy, and the second extending electrode extends to a position corresponding to the position of the fixed end and is electrically connected to the receptacle body by wire bonding at a single point of the fixed end, and wherein the position at which the wire is bonded to the second extended electrode and the position of the eutectic alloy are in alignment in the thickness direction of the crystal blank, wherein the single fixed end is located and confined at one corner of the crystal blank, and the first and second extending electrodes extend toward the one corner portion and overlap via the crystal blank only at the corner portion as viewed in a thickness direction of the crystal blank.