In a preferred embodiment of the invention, the ends of the electrode terminal 12 have a greater resistance than the portion in between, so that the resistance near {TAIL ~ the ends} of {HEAD ~ the terminal} 12 increases gradually instead of increasing abruptly at the ends of the terminal 12 
In a preferred embodiment of the invention , the ends of the electrode terminal 12 have a greater resistance than the portion in between , so that the resistance near { TAIL ~ the ends } of { HEAD ~ the terminal } 12 increases gradually instead of increasing abruptly at the ends of the terminal 12
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH