Laser direct imaging apparatus and imaging method
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United States of America Patent
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Nov 20, 2012
Grant Date -
Apr 2, 2009
app pub date -
Aug 14, 2008
filing date -
Sep 3, 2007
priority date (Note) -
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Abstract
A laser beam direct imaging apparatus and an imaging method which can precisely determine a back-surface-side position with respect to a front-surface-side position even if any kind of photosensitive material is used. In the laser direct imaging apparatus, a laser beam is deflected toward a main scanning direction (X-axis direction) while a workpiece mounted on a table is moved in a sub-scanning direction (Y-axis direction) so that a pattern is imaged on the surface of the workpiece. Hollow pins are disposed on the table so that the tips of the hollow pins 20 project over the surface of the table by a predetermined distance. The workpiece is sucked onto the table so that indentations (indentations by the tips of the hollow pins) are formed on the back surface of the workpiece. When a pattern is imaged on the back surface, imaging is performed with reference to the indentations.
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