| 摘要 |
PROBLEM TO BE SOLVED: To connect two printed substrates to each other, while a space therebetween is set as a necessary minimum, without having to use a connector. SOLUTION: Projection parts 14 are formed in at least one of a first printed substrate 11 and a second printed substrate 12, and a spacer 13 is formed between the first printed substrate 11 and the second printed substrate 12. In a space to a certain degree that the projection parts 14 do not come into contact with a mating side, the spacer 13 is pinched between the first printed substrate 11 and the second printed substrate 12 to form a clearance, and a solder 15 is made a reflow, so that the first printed substrate 11 is connected to the second printed substrate 12.
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