Patent ID: 9704795
Date: 2017-07-11
CPC Classifications: H01L,H05K

Claim:
1. A printed wiring board, comprising: a resin insulating layer; a first conductor layer embedded into a first surface of the resin insulating layer and comprising a plurality of wirings such that the plurality of wirings includes a plurality of connecting portions positioned to connect an electronic component, respectively; a second conductor layer projecting from a second surface of the resin insulating layer on an opposite side with respect to the first surface of the resin insulating layer; a solder resist layer formed on the first surface of the resin insulating layer such that the solder resist layer is covering the first conductor layer and has an opening structure exposing the connecting portions of the wirings; and a plurality of metal posts formed on the plurality of connecting portions respectively such that each of the metal posts has a width which is larger than a width of a respective one of the wirings having the connecting portions, wherein the plurality of wirings is formed such that the connecting portions are positioned side by side on every other adjacent one of the wirings.