| 摘要 |
An apparatus for holding a printed wiring board, including a holding table which has a flat upper surface and a plurality of negative-pressure-supply holes each of which has an opening in the upper surface, a holding member which is attachable to the upper surface of the holding table such that a lower end surface of the holding member is held in close contact with a portion of the upper surface that surrounds the opening of one negative-pressure-supply hole, the holding member having a negative-pressure passage which is formed therethrough to connect between the lower end surface and an upper end surface thereof, the holding member supporting, at the upper end surface thereof, the printed wiring board, and applying a negative pressure supplied from the negative-pressure-supply hole via the negative-pressure passage, to the board and thereby holding the board, and a plurality of opening and closing valves which are associated with the plurality of negative-pressure-supply holes, respectively, each of the opening and closing valves closing a corresponding one of the negative-pressure-supply holes in a state in which the holding member is not attached to the portion of the upper surface of the holding table that surrounds the opening of the corresponding negative-pressure-supply hole, and opening the corresponding hole, in a state in which the holding member is attached to the portion of the upper surface, so that the corresponding hole is communicated with the negative-pressure passage of the holding member.
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