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Method of Photomask and Blank Alignment for Direct Exposure of PCB Based on a Liquid Crystal Matrix
https://doi.org/10.17586/0021-3454-2025-68-4-342-354
Abstract
A method of optical alignment of photomask and blank for installing direct exposure of PCB on a liquid crystal matrix to form a desired topology on the photosensitive material is presented. In particular, the processes of calibrating the video camera position relative to the working field of the installation and positioning the image with the transferred topology relative to the workpiece position are considered. Implementation algorithms are compiled for each process and experimental testing is performed to confirm their operability. Statistical analysis shows an error in alignment the photomask topology with the blank of ± 300 microns. The developed algorithms and corresponding software implementations can be used as a methodological and programmatic basis for a study of methods for evaluating and compensating for PCB deformation during its manufacture.
Keywords
production of printed circuit boards,
deformation of printed circuit boards,
direct exposure,
digital photomask,
liquid crystal display,
reliability of PCB manufacturing processes
Supporting agencies: The work was supported by a grant from the Russian Science Foundation, grant No. 23-29-10204.
About the Authors
M. A. Korobkov
Moscow Aviation Institute
Russian Federation
Russian Federation
Maksim A. Korobkov — Post-Graduate Student; Department of Digital Technologies and Information Systems; Senior Lecturer
Moscow
A. S. Demidov
Moscow Aviation Institute
Russian Federation
Russian Federation
Artem S. Demidov — Student; Department of Digital Technologies and Information Systems; Engineer
Moscow
O. V. Khomutskaya
Moscow Aviation Institute
Russian Federation
Russian Federation
Olga V. Khomutskaya — PhD, Associate Professor; Department of Digital Technologies and Information Systems
Moscow
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Review
For citations:
Korobkov M.A., Demidov A.S., Khomutskaya O.V. Method of Photomask and Blank Alignment for Direct Exposure of PCB Based on a Liquid Crystal Matrix. Journal of Instrument Engineering. 2025;68(4):342-354. (In Russ.) https://doi.org/10.17586/0021-3454-2025-68-4-342-354
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