Patent ID: 8467062

Claim:
An inspection device, for inspecting the presence or absence of a foreign object in an insulating cover layer in a wired circuit board provided with an insulating base layer, a conductive pattern formed on the insulating base layer and the insulating cover layer formed on the insulating base layer so as to cover the conductive pattern, includes a light emitting unit emitting incident light that enters the insulating cover layer and a light receiving unit receiving reflected light that is reflected from the incident light on the surface of the insulating cover layer, wherein the light emitting unit includes a first light emitting portion in a ring state that emits the incident light so that the angle thereof with respect to the surface of the insulating base layer is in the range of 25° or less and a second light emitting portion in a ring state that emits the incident light so that the angle thereof with respect to the surface of the insulating base layer is in the range of 35 to 65°.