| 摘要 |
PROBLEM TO BE SOLVED: To prevent chip component mounted to a printed circuit board from being broken due to collision of the inner wall of a packing box and a board or that of boards during transportation. SOLUTION: In a printed circuit board, to which a surface mounted electronic component is mounted, a larger collision-preventing member than the largest surface mounted electronic component in height is provided on the mounted surface of the electronic component. In this case, it is more effective that the surface mounted electronic component be mounted to one surface side of the printed circuit board and a discrete electronic part is mounted to the other surface side thereof. To detect any impart to the board at the same time, a laminate made of non-metallic inorganic material, for example, a laminated ceramic chip capacitor is preferably used as the collision-preventing member. To prevent the electric impact from occurring due to residual electric charges of the board at the same time, a part made of metallic material is preferably used as the collision-preventing member.
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