A circuit board exposure method and device

Abstract

The invention discloses a circuit board exposure method and device. The method comprises the steps that an optical identification element in an exposure machine is used to identify four target positions arranged on a PCB board; according to four target positions, the actual size of the PCB board is calculated; the standard size corresponding to the PCB board is acquired from a database; the actual size and the standard size of the PCB board are used to calculate an expansion factor; an object corresponding to the expansion factor is acquired from a preset expansion factor set corresponding to the PCB board; according to the object, a corresponding translation table is acquired; according to translation amount data in the translation table, corresponding exposure areas in the exposure machine are respectively translated; and after translation is carried out, the exposure machine is controlled to expose the PCB board. According to the invention, automatic expansion factor calculation is realized; corresponding exposure data are selected to adjust each exposure area, and then exposing is carried out; and the ability of exposure alignment of an outer layer is effectively improved.

Description

technical field [0001] The invention relates to a circuit board exposure method and device. Background technique [0002] In order to efficiently manufacture PCB boards, usually multiple PCB areas of the same size are distributed in a large PCB board, but there will be a certain expansion and contraction phenomenon after the PCB board is produced, and different PCB areas will exist. Different expansion and contraction. Therefore, it is necessary to adjust the exposure area corresponding to each PCB area. The existing technology can summarize the relationship between the expansion and contraction coefficient of the PCB board and the translation amount required for each exposure area through experiments, and then use different expansion and contraction coefficients The relationship between the translation amount required for each exposure area is made into different exposure files, but the existing ones need to manually select different exposure files and use the exposure mac...

AI Technical Summary

Problems solved by technology

[0002] In order to efficiently manufacture PCB boards, usually multiple PCB areas of the same size are distributed in a large PCB board, but there will be a certain expansion and contraction phenomenon after the PCB board is produced, and different PCB areas will exist. Different expansion and contraction

Therefore, it is necessary to adjust the exposure area corresponding to each PCB area. The existing technology can summarize the relationship between the expansion and contraction coefficient of the PCB board and the translation amount required for each exposure area through experiments, and then use different expansion and contraction coefficients The relationship between the translation amount required for each exposure area is made into different exposure files, but the existing ones need to manually select different exposure files and use the exposure machine to judge whether they match the actual PCB board, which is inefficient and possible. The wrong exposure file was selected, which caused the problem of graphic deviation after exposure

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