Patent 7491986 was granted and assigned to Panasonic on February, 2009 by the United States Patent and Trademark Office.
A different electric power supply electric power source cell is proposed which includes paths by which electric power source voltages, the electric potentials of which are different from each other, are respectively taken in from the area pad and the probing pad and by which the voltages are supplied to the blocks requiring these electric power source voltages.