Patent ID: 7823276

Claim:
A parts mounting method for mounting parts on a printed circuit board having lands for receiving parts to be mounted on the printed circuit board having resist formed on the surface thereof, the lands for receiving parts having exposed openings free from the resist, the printed circuit board also including lands for alignment having exposed openings free from the resist, the lands for receiving parts and the lands for alignment made of electrically conducting metal, the method comprising: locating said lands for receiving parts and said lands for alignment at separate locations on said printed circuit board by detecting the metal of the lands for receiving parts and the metal of the lands for alignment; depositing solder on the lands for receiving parts to form a pieces of solder for attaching the parts to be mounted, and depositing solder on the metal of the lands for alignment to form solder alignment marks; correcting with use of positions of the solder alignment marks mounting positions of the parts to be mounted on the pieces of solder formed on the lands for receiving parts; mounting the parts on the corrected mounting positions on the pieces of solder formed on the lands for receiving parts and soldering the parts to the lands for receiving parts by heating and melting the solder; and forming spare marks of solder resist onto the lands for alignment before said depositing solder on the metal of the lands for alignment, wherein in said deposition solder on the lands for alignment, the spare marks are entirely covered by the solder alignment marks.