Patent ID: 8316532

Claim:
A producing method of a wired circuit board, the producing method comprising the steps of: preparing the wired circuit board comprising an insulating base layer, a conductive pattern formed on the insulating base layer, and an insulating cover layer formed on the insulating base layer so as to cover the conductive pattern; placing the wired circuit board on a support table; and applying light from above the wired circuit board toward the wired circuit board, and sensing pattern reflected light which is the light reflected by the conductive pattern via the insulating cover layer, table reflected light which is the light reflected by the support table via the insulating cover layer and the insulating base layer exposed from the conductive pattern, and foreign-matter reflected light which is the light reflected by a foreign matter present on the insulating base layer exposed from the conductive pattern to inspect the conductive pattern and the foreign matter based on a contrast therebetween, wherein, in the step of inspecting the conductive pattern and the foreign matter, a reflectance of the table reflected light is in a range of 25 to 55%, and a reflectance of the foreign-matter reflected light is in a range of not more than 10%.