发明授权
US07477354B2 Projection exposure apparatus and method for producing a printed circuit board 有权
投影曝光装置及印刷电路板的制造方法

Projection exposure apparatus and method for producing a printed circuit board
摘要:
A projection exposure apparatus and a method for producing a printed circuit board wherein, the whole pattern including pieces 10 and coupons 12 to be exposed on a print circuit board 2 is depicted on a photo mask 1 divided in six areas by divide line 19, the exposure will be made with respect to the each divided area of the photo mask 1 mounted on a movable photo mask stage 5 with using a masking device 3 masking other area than the exposing area.
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