Patent 7723617 was granted and assigned to Nitto Denko on May, 2010 by the United States Patent and Trademark Office.
A wired circuit board has a metal supporting board, a metal foil formed on the metal supporting board to have a thickness of less than 2.0 μm, a first insulating layer formed on the metal supporting board to cover the metal foil, and a conductive pattern formed on the first insulating layer.