Laser transfer printing alignment device for electrode laser transfer printing and alignment method thereof

Abstract

The invention discloses a laser transfer printing alignment device for electrode laser transfer printing. The laser transfer printing alignment device comprises a slurry carrier, a laser and a slurry carrier vision positioning system, wherein the slurry carrier is provided with at least one metal electrode hollow design which corresponds to a metal electrode of a to-be-printed battery piece on a printing workstation; the laser is provided with a laser scanning head and a controller, and the signal input end of the laser scanning head is connected with the signal output end of the controller; the slurry carrier vision positioning system is provided with a reflecting mirror and a plurality of cameras, and the signal output ends of the plurality of cameras are connected with the signal input end of the controller; when the to-be-printed battery piece is positioned on the printing workstation, an image of the metal electrode hollow design on the slurry carrier is reflected into the plurality of cameras by the reflecting mirror. According to the laser transfer printing alignment device, the accurate and numerical positioning of the pattern is realized in the implementation process of a laser transfer printing technique, the alignment precision is increased according to actual patterns of the slurry carrier, poor printing of the technique is reduced, and finer printing is realized.

Description

technical field [0001] The invention relates to a laser transfer alignment device used in electrode laser transfer printing and an alignment method thereof, belonging to the technical field of laser transfer printing. Background technique [0002] At present, in the production process of traditional photovoltaic solar cells, the electrode is to apply the conductive silver paste to the substrate (silicon wafer) of the battery sheet through the method of screen printing. Printing on the surface of the cell, which involves the alignment of the screen and the cell, is achieved by using two sets of vision systems to search for the MARK points on the screen and the four edges of the silicon wafer, thereby locating the screen and the silicon. This method does not take into account that during the printing process of the screen, during the service life of the screen, as the number of printed battery sheets increases, the screen itself has a deformation. If the front electrode is pri...

AI Technical Summary

Problems solved by technology

[0002] At present, in the production process of traditional photovoltaic solar cells, the electrode is to apply the conductive silver paste to the substrate (silicon wafer) of the battery sheet through the method of screen printing. Printing on the surface of the cell, which involves the alignment of the screen and the cell, is achieved by using two sets of vision systems to search for the MARK points on the screen and the four edges of the silicon wafer, thereby locating the screen and the silicon. This method does not take into account that during the printing process of the screen, during the service life of the screen, as the number of printed battery sheets increases, the screen itself has a deformation. If the front electrode is printed The deformation of the two devices is inconsistent, which will lead to inaccurate alignment of the two printings of the front electrodes, resulting in poor thickening of the metal electrodes, which affects both the appearance and the electrical performance and conversion efficiency of the cell.

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