| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit board device which prevents a short circuit or the like, when solder protrudes on a land and whose productivity and reliability are enhanced, by forming a solder escape hole between the board and the land. SOLUTION: Lands 3 connected to a wiring pattern 2 are insulated on the board 1, and respective electrodes 5A of an electronic component 5 are connected to the lands 3 by the solder 10. Solder escape holes 7, making use of through-holes 6, are formed between the board 1 and the lands 3, and solder attraction lands 8 are installed on the side of a rear surface 1B of the board 1. When the electronic component 5 is mounted, excess solder 10A from among the molten solder 10 is made to escape to the holes 7, and the solder 10A is attracted to the lands 8. Thereby, the solder 10A is prevented from protruding from the lands 3, so as to come into contact with the lands 3 in the circumference, the yield of the circuit board device in its manufacture is increased, and the reliability of the circuit board device can be enhanced.
|
