Patent ID: 7659727

Claim:
A multilayer wiring board comprising: (a) an electrical insulating base substrate, which is a common part among a variety of the multilayer wiring boards; and (b) a multilayer wiring section formed on the base substrate, the multilayer wiring section being a characteristic part different from others among a variety of the multilayer wiring boards and having a laminated structure consisting of alternating layers of plural conductor layers and plural insulating layers, and the multilayer wiring section further having at least one three-dimensional wiring path, which consists of an interconnection of wiring patterns belonging to the respective conductor layers via connecting conductors passing through the respective insulating layers, wherein at least one of the conductor layers includes a grounded pattern; the multilayer wiring section has a test pad, which appears on a surface of the multilayer wiring section and is connected to the grounded pattern; and each of the conductor layers in the multilayer wiring section includes a reference pattern having a predetermined length, the reference pattern being usable as a standard for an electric capacitance.