Patent ID: 7313862

Claim:
A method of printing solder paste onto a printed wiring board with use of a printing machine, the printed wiring board including a board recognition mark formed of a conductive foil, a first component land covered with resist, and a second component land not covered with the resist, wherein the board recognition mark is defined by an area of the conductive foil exposed from a resist opening having the same shape and size as the conductive foil, the method comprising: capturing an image of the board recognition mark defined by the area of the conductive foil exposed from the resist opening with use of an imaging device to find a center point of the board recognition mark; and printing first and second solder pastes with reference to the center point to equalize a misalignment amount of the first solder paste with respect to the first component land covered with the resist and a misalignment amount of the second solder paste with respect to the second component land not covered with the resist.