Patent ID: 8745860

Claim:
A method for manufacturing a printed wiring board, comprising: forming on a support board a first resin insulation layer having a first surface and a second surface on an opposite side of the first surface of the first resin insulation layer such that the second surface of the first resin insulation layer faces the support board; forming a removable layer covering a portion of the first surface of the first resin insulation layer; forming on the first surface of the first resin insulation layer a second resin insulation layer having a first surface and a second surface on an opposite side of the first surface of the second resin insulation layer such that the second surface of the second resin insulation layer faces the first surface of the first resin insulation layer; forming in the second resin insulation layer an opening portion in which an electronic component having an electrode is mounted; accommodating the electronic component in the opening portion of the second resin insulation layer such that the electrode of the electronic component faces the first surface of the second resin insulation layer; forming on the first surface of the second resin insulation layer and the electronic component an interlayer resin insulation layer; and forming in the interlayer resin insulation layer a via conductor reaching to the electrode of the electronic component, wherein the removable layer is position to correspond to the opening portion of the second resin insulation layer, and the forming of the opening portion in the second resin insulation layer removes the removable layer along with a portion of the second resin insulation layer corresponding to the opening portion.