CPC B41J 11/42 (2013.01) [B41J 2/04505 (2013.01); B41J 2/04526 (2013.01); B41J 2/04556 (2013.01); B41J 11/008 (2013.01); B41J 11/55 (2013.01); B41J 25/001 (2013.01); H05K 3/125 (2013.01)] | 20 Claims |
1. An apparatus for treating a substrate, comprising:
a stage extending in a first direction, configured to move a substrate in the first direction, and having an air floating system;
a gantry arranged on the stage to extend in a second direction crossing the first direction;
a head module installed on the gantry and movable in the second direction; and
a displacement sensor installed in the head module and configured to measure a separation distance between the substrate and the stage,
wherein at a first position, the head module ejects ink to the substrate and the displacement sensor measures a first separation distance between the substrate and the stage, and
at a second position that is different from the first position, the head module ejects ink to the substrate and the displacement sensor measures a second separation distance between the substrate and the stage.
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