Patent ID: 7471519

Claim:
A wired circuit board comprising: an insulating base layer; a metal board on which the insulating base layer is formed; a first conductor layer and a second conductor layer formed on the insulating base layer; an insulating cover layer formed on the insulating base layer to cover the first conductor layer and the second conductor layer, wherein the insulating cover layer comprises openings for a first terminal and a second terminal of a preamplifier terminal portion, for a third terminal being a terminal of a magnetic head terminal portion, and for a fourth terminal being a terminal of an external terminal portion; the third terminal formed on a surface of the first conductor layer exposed from the insulating cover layer at the forming position for the third terminal being the terminal of the magnetic head terminal portion; the fourth terminal formed on a surface of the second conductor layer exposed from the insulating cover layer at the forming position for the fourth terminal being the terminal of the external terminal portion; and the first terminal and the second terminal formed on the surface of the first conductor layer and the second conductor layer respectively exposed from the insulating cover layer at the forming position of the first terminal and the second terminal of the preamplifier terminal portion; wherein: the first conductor layer is connected to the magnetic head at the third terminal being the terminal of the magnetic head terminal portion and to the preamplifier at the first terminal of the preamplifier terminal portion; the second conductor layer is connected to the preamplifier at the second terminal of the preamplifier terminal portion; the first conductor layer and the second conductor layer are electrically connected through the preamplifier; a portion of the wired circuit board comprising the magnetic head terminal portion serves as a suspension board portion for supporting the magnetic head; a portion of the wired circuit board comprising the preamplifier terminal portion and the external terminal portion serves as a control board portion for operating the magnetic head; and the first conductor layer and the second conductor layer are formed from the same material; further wherein: the metal board comprises first, second, and third portions which only correspond to the suspension board portion, the external terminal portion and to the preamplifier terminal portion, respectively, with the metal board serving as a supporting board in the first portion which corresponds to the suspension board portion, with the metal board serving as a stiffening layer in the second portion which corresponds to the external terminal portion, and with the metal board serving as a mounting portion in the third portion which corresponds to the preamplifier terminal portion.