| 摘要 |
PROBLEM TO BE SOLVED: To easily observe a printed board from both front and rear sides when observing the connection terminal section of the printed board and the outer shape of the board. SOLUTION: The printed board 1, where the wiring pattern of a conductive material is printed on a base, is placed on a background 19 of a stage 13 having the background 19 with a background color. The surface of the printed board 1 is irradiated with irradiation light, and the conductive material exposed to a material base on the printed board 1 is observed by an observation means 11 from a side irradiated with the irradiation light. In this case, a wavelength is used for transmitting the irradiating light through the base material. Additionally, when the printed board 1 is observed from a front-surface side at which the conductive material is exposed to the base material, the background 19 of the stage 13 has the background color that does not reflect the irradiation light. Contrarily, when the printed board 1 is observed from a rear-surface side, the background 19 of the stage 13 has the background color for reflecting the irradiation light. COPYRIGHT: (C)2006,JPO&NCIPI
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