Patent ID: 8570763

Claim:
A resin substrate comprising: a core substrate including an in-plane electrode in a top surface thereof; a light reflective conductor having a smooth surface provided on the in-plane electrode, the smooth surface of the light reflective conductor having a curved convex shape; a resin layer arranged on the core substrate so as to cover the in-plane electrode and the light reflective conductor; and an interlayer connection conductor defined by a hole for an interlayer connection conductor that extends from a top surface of the resin layer to the light reflective conductor and that is covered or filled with a conductive material; wherein the light reflective conductor is made of a cream solder that has been applied on the in-plane electrode, melted, and hardened; and the light reflective conductor is provided on a portion of the in-plane electrode adjacent to or aligned with the hole in the resin layer but not on other portions of the in-plane electrode.