Patent ID: 9113574
Filing Date: 2015-08-18
Classification: H05K,Y02P,Y10T

Abstract:
1. A wiring board with a built-in electronic component, comprising: a core substrate having a cavity portion and at least one side wall forming the cavity portion, the at least one side wall extending from a first surface of the core substrate to a second surface opposite to the first surface; an electronic component accommodated in the cavity portion of the core substrate and comprising a body portion and a plurality of conductive portions formed on a surface of the body portion; a filling resin filling a space formed in the cavity portion having the electronic component positioned in the cavity portion; and a resin insulation layer formed on the core substrate such that the resin insulation layer is covering an opening of the cavity portion and a surface of the electronic component, wherein the core substrate has an inclination suppressing structure formed on the at least one side wall forming the cavity portion such that a distance between the side wall forming the cavity portion and the electronic component varies in a first portion of the side wall having the inclination suppressing structure and a second portion of the side wall other than the first portion having the inclination suppressing structure, the inclination suppressing structure comprises a protrusion portion protruding toward the electronic component from the side wall forming the cavity portion or a recess portion recessed away from the electronic component; and the inclination suppressing structure is formed such that when one of the first and second portions comes into contact with the electronic component, the other of the first and second portions is separated from the electronic component by a gap which extends along the side wall from the first surface to the second surface of the core substrate.