Suspension board with circuit

A suspension board with circuit for mounting thereon a slider/light source unit provided with a slider on which a magnetic head is mounted, and a light source device including a main body, and a light source provided to protrude from the main body, the suspension board with circuit comprising:

• a receiving portion formed therein to be operative to receive the light source;
• a guide surface for guiding the light source to the receiving portion when the slider/light source unit is mounted;
• a metal supporting board extending in a longitudinal direction thereof;
• and
• an insulating base layer laminated on one side of the metal supporting board in a thickness direction thereof,
• wherein a support opening is formed on the metal supporting board,
• wherein, in the insulating base layer, a base opening is formed to partially overlap the support opening in the thickness direction and a protruding opening is formed to protrude from one longitudinal end portion of the base opening toward one side of the base opening in the longitudinal direction,
• wherein the receiving portion defines the protruding opening,
• wherein, when the slider/light source unit is mounted, the main body is contained in the base opening and the light source is inserted into the protruding opening, and
• wherein the guide surface is formed from an end surface of the protruding opening.