Abstract: An electronic parts substrate includes a base substrate, a plurality of insulating resin layers provided on the base substrate, at least one conductive circuit, and at least one filled via provided in the plurality of insulating resin layers. The at least one conductive circuit is sandwiched between the plurality of insulating resin layers and/or between the base substrate and the plurality of insulating resin layers. At least one opening is formed in at least one of the plurality of insulating resin layers.

Abstract: An electronic parts substrate includes a base substrate, a plurality of insulating resin layers provided on the base substrate, at least one conductive circuit, and at least one filled via provided in the plurality of insulating resin layers. The at least one conductive circuit is sandwiched between the plurality of insulating resin layers and/or between the base substrate and the plurality of insulating resin layers. At least one opening is formed in at least one of the plurality of insulating resin layers.

Abstract: A single circuit board has at least two planar sections and a bent section linking the planar sections. The circuit board has a circuit layer disposed on an insulating layer to provide routings and electrical connections to the electronic components on the two planar sections. The circuit layer has at least one circuit section on each of the two planer sections and one circuit section on the bent section. The single circuit board can have a ground plane or a second circuit layer disposed on the insulting layer on the opposite side of the circuit layer. The planar sections can be located on the same plane or on different planes. The multi-section circuit board can be made from a single-plane circuit board by using a mechanical tool to bend the board into shape.