| 摘要 |
According to an embodiment of the present invention, a screen printer applies solder paste on a circuit pattern of a printed circuit board supported by a backup block, and comprises a control unit, a drive unit, and a photographing unit. The drive unit applies the solder paste on the circuit pattern of the printed circuit board according to control signals from the control unit. The photographing unit operates according to the control signals from the control unit. The control unit uses images from the photographing unit to obtain a discrepancy error between a planar image of the printed circuit board and a planar image of the backup block and output the obtained discrepancy error. |
