Patent ID: 7957614

Claim:
A suspension board with circuit comprising: a circuit board, which is to be provided with a magnetic head in a hard disk drive, and is operative to support the magnetic head while keeping a minute gap between the magnetic head and the hard disk drive against an airflow caused when the magnetic head and the hard disk drive travel relatively to each other, comprising a metal supporting board, an insulating pattern formed on the metal supporting board, and a conductive pattern formed on the insulating pattern; an optical waveguide disposed on the circuit board, wherein the conductive pattern includes external connecting terminal portions, head-side connecting terminal portions to which terminal portions of the magnetic head are connected, and signal wires for connecting the external connecting terminal portions and the head-side connecting terminal portions; and wherein the optical waveguide is formed with a rear end connected to a light emitting device and a front end placed in a terminal forming portion that is a region in which the head-side connecting terminal portions are formed, for allowing a light to be emitted to the hard disk drive; and a plurality of individual positioning projections provided on the circuit board and arranged on opposite sides of the optical waveguide so as to sandwich the optical waveguide therebetween in order to position the optical waveguide with respect to the circuit board.