Patent ID: 9564392
Date: 2017-02-07
CPC Classifications: H01L,H05K

Claim:
1. A printed wiring board, comprising: a resin insulating layer; a wiring conductor layer embedded in the resin insulating layer such that the wiring conductor layer has a first surface exposed on a first surface side of the resin insulating layer; and a conductor post formed on a second surface of the wiring conductor layer on an opposite side with respect to the first surface such that the conductor post has a side surface covered by the resin insulating layer, wherein the conductor post has an end surface on an opposite with respect to the wiring conductor layer such that the end surface of the conductor post is exposed on a second surface side of the resin insulating layer, and the conductor post has an end portion on a wiring conductor layer side such that the side surface in the end portion is a curved side surface which is bending outward increasingly toward from the wiring conductor layer.