Patent ID: 7644497

Claim:
A manufacturing method of a component built-in wiring board, comprising: preparing a core wiring board having a wiring layer on at least an upper surface and a lower surface thereof respectively; forming a through hole through the core wiring board; forming a plating layer on an inner surface of the through hole; patterning the wiring layer provided on the upper and lower surfaces; machining the core wiring board so as to split the plating layer formed on the inner surface of the through hole according to the number of terminals of an electrical component that is to be built and so as to make a space for housing the electrical component that is to be built in; placing the electrical component in the space; connecting each of the terminals of the electrical component to the split plating layer via a conductive member; and forming and stacking insulating layers respectively on the upper and lower surfaces of the core wiring board to which the electrical component is connected via the conductive member, so as to fill a vicinity of the electrical component.