wherein a portion of {HEAD ~ the outer peripheral face} of {TAIL ~ the diameter contracted portion} is provided with a step portion formed substantially by a flat face and subjected to wire bonding with the other of the exciting electrodes 
wherein a portion of { HEAD ~ the outer peripheral face } of { TAIL ~ the diameter contracted portion } is provided with a step portion formed substantially by a flat face and subjected to wire bonding with the other of the exciting electrodes
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH