Patent ID: 8174844

Claim:
A wired circuit board for electrically connecting a suspension board with circuit comprising a metal supporting layer, an insulating base layer formed on the metal supporting layer, a conductive layer formed on the insulating base layer, and an insulating cover layer formed on the insulating base layer so as to cover the conductive layer, and an external circuit, comprising: a first wired circuit board electrically connected with the suspension board with circuit; and a second wired circuit board for electrically connecting with the external circuit, the second wired circuit board being separate and distinct from the first wired circuit board, such that the second wired circuit board is spaced apart from the first wired circuit board so as to form a gap therebetween, the first wired circuit board and the second wired circuit board are directly connected to a preamplifier so that the first wired circuit board and the second wired circuit board are not directly connected to each other, thereby being electrically connected through the preamplifier, the preamplifier being disposed on the first and second wired circuit boards so as to bridge the gap therebetween, the first wired circuit board comprising: a first metal supporting layer; a first insulating base layer formed on the metal supporting layer; a first conductive layer formed on the first insulating base layer; and a first insulating cover layer formed on the first insulating base layer so as to cover the first conductive layer.