| 摘要 |
PROBLEM TO BE SOLVED: To separate, insulated, and print castellation conductors on the inner peripheral surfaces of through holes of a substrate for multiple boards. SOLUTION: The multiple board substrate 11 having through holes 13 formed along a division line is set on a suction plate 21 and a screen mask 22 is set on the substrate 11; while air is sucked into the through holes 13 from a suction hole 25 of the suction plate 21, conductor paste on the suction plate 21 is extruded from an opening part 23 of the screen mask 22 into the through holes 13 by a squeezee 28 to print castellation conductors by the through holes 13 so that they are separated across the division line. In this case, the suction hole 25 of the suction plate 21 is formed to the print width of the castellation conductors, and the part where the conductor paste is not printed is closed with the suction plate 21 to make the air sucking operate concentrically on only the part of the conductor paste is printed.
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