| 摘要 |
A transmitting window is provided on one side of a casing opposite to a substrate outlet. An ionizer is provided outside the transmitting window of a cleaning unit. The transmitting window is made of a polyimide resin or an acrylic resin, for example. Weak X-rays emitted from the ionizer pass through the transmitting window to reach the substrate outlet, shutter, spin chuck, guard, and the like in the cleaning unit. The spin chuck comprises a plurality of conductive holding pins.
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