Patent ID: 8737085

Claim:
A wiring board with a built-in component, comprising: a wiring pattern; an electric/electronic component electrically and mechanically connected with a surface of said wiring pattern; and an insulating layer formed on the surface of said wiring pattern and configured so as to embed said component, said insulating layer including: a first sub-layer having a lower surface in contact with said wiring pattern and a lateral surface in contact with said component; and a second sub-layer laminated on an upper surface of said first sub-layer, said second sub-layer having an opening formed therethrough, said opening having an edge surrounding and spaced away from said component, said first sub-layer and said second sub-layer each having an insulating resin and a reinforcing material included in the insulating resin, said first sub-layer having a thickness such that said upper surface of said first sub-layer is at a level between an upper surface of said component and a lower surface of said component; and an interlayer connector penetrating through said first sub-layer, said interlayer connector having an axis along a stacking direction of said wiring board and being connected to said component electrically through said wiring pattern, wherein said reinforcing material of said first sub-layer reaches said interlayer connector without reaching said component; and wherein said insulating resin of said first sub-layer reaches said interlayer connector and said component, and occupies a space between said edge of said opening of said second sub-layer and said component.