Patent ID: 8101870

Claim:
A method for manufacturing a printed circuit board, comprising: preparing a printed wiring board, the printed wiring board comprising a through hole and a plurality of electrode pads; coating surfaces of the plurality of electrode pads and a surface of the through hole on a first side of the printed wiring board with a bonding material; mounting a semiconductor package on the printed wiring board such that a plurality of bumps on a surface of the semiconductor package corresponds to the plurality of electrode pads; bonding the bumps to the electrode pads by heating the printed wiring board on which the semiconductor package is mounted; forming a protrusion portion protruding from the through hole by melting the bonding material and filling the through hole with the melted bonding material; and filling a space between the semiconductor package and the printed wiring board with a filler material, wherein the protrusion portion is configured to block the filler material filled in the space between the semiconductor package and the printed wiring board from flowing into the through hole.