A method for individualised marking of circuit boards
A technology for distinguishing marks and circuit boards, applied in circuit inspection/identification, removal of conductive materials by chemical/electrolytic methods, circuits, etc., can solve problems such as unsuitable exposure technology
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[0037] In the figures, the same reference numerals denote mutually corresponding elements. exist figure 1 In, reference numeral 1 denotes a light source, and reference numeral 2 denotes its light beam, which is directed to a photosensitive surface portion 5 of a circuit board 6 to be marked. An optical device 3 and a device 4 with adjustable transparency are arranged in the light beam 2 of the light source 1 . The device 4 comprises a region 41 which is in the direction of propagation of the light and which allows the passage of light, and a region 42 which does not allow the passage of light or whose transparency is substantially lower than that of the region 41 .
[0038] The shape and position of the areas 41 and 42 are selected so that by means of them a pattern corresponding to the desired marking can be formed on the photosensitive surface 5 of the circuit board 6 . The figures do not show the means for adjusting the shape and / or position of the regions 41 and 42 . In...
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