Patent ID: 9526168
Filing Date: 2016-12-20
CPC Classification: H01L,H05K,Y10T

Claim Text:
1. A printed wiring board, comprising: an inner conductive-circuit layer; an insulation layer structure comprising a first insulation layer laminated on the inner conductive-circuit layer and a second insulation layer laminated on the first insulation layer; and an outermost conductive-circuit layer laminated on the insulation layer structure and comprising a plurality of connection portions such that the plurality of connection portions is positioned to mount a component on the insulation layer structure, wherein the second insulation layer is interposed between the first insulation layer and the outermost conductive-circuit layer and has a thickness which is smaller than a thickness of the first insulation layer such that an outer surface of the second insulation layer on an outermost conductive-circuit-layer side is flatter than an inner surface of the second insulation layer on a first insulation-layer side.