Method of adjusting relative positions of mask film and circuit board - involves adjusting positions of film and board with absolute coordination systems so each can be moved in same plane independently

摘要

The method is for adjusting the relative positions of a masking film (7) and a circuit board covered with a light sensitive layer. The circuit board is exposed by the film (7) so it has the circuit pattern printed on it. The position of the film (7) and also that of the circuit board are each adjusted with an absolute coordinate system. A movable optical scanner (12-17) simultaneously scans a pattern (4) representing the coordinate system and the film or circuit board to be adjusted. ADVANTAGE - Ensures accurate exposures of circuit boards for any desired circuit pattern.