Silk-screen printing method capable of reducing slurry printing thickness

Abstract

The invention discloses a silk-screen printing method capable of reducing the slurry printing thickness. The method comprises the following steps of taking the starting position of the forward stroke of scraper printing on a screen printing plate as a starting position, taking the ending position of the forward stroke of scraper printing on the screen printing plate as a scraper retracting position, and not pushing slurry at the scraper retracting position back to the starting position during silk-screen printing, so that the scraper is coated with slurry at the scraper retracting position; and separating the scraper coated with the slurry from the screen printing plate and returning to the starting position, taking the adhered slurry back to the starting position of the screen printing plate by the scraper, and printing the screen printing plate by the scraper based on the taken-back slurry. According to the silk-screen printing method, the slurry printing thickness can be reduced, the slurry consumption is thus reduced, and the purpose of thin printing is realized.

Description

technical field [0001] The invention relates to a screen printing method capable of reducing the printing thickness of paste. Background technique [0002] Screen printing is a main process for preparing batteries in the photovoltaic industry. It can not only print metal electrodes, collect and export current, but also can be used as a deposition method to deposit doped paste (boron paste and phosphorus paste) to make PN junctions or high-low junctions. . With the development and progress of the photovoltaic industry, various manufacturers are becoming more and more refined in cost control, and slurry, as a major consumable in the photovoltaic industry, hopes to save as much as possible. [0003] The screen printing machine is mainly composed of a printing head (including a scraper and an ink return knife), a printing table, a screen, and a screen frame. The screen plate is fixed on the screen frame, and the screen plate is squeezed and deformed by the scraper to squeeze t...

AI Technical Summary

Problems solved by technology

[0005] However, the pre-deposition of the existing screen printing method is to use a scraper to print first, and then a ink return knife to return the material. After the material is returned, when the slurry is covered with the screen pattern, there will be infiltration. The smaller the viscosity of the slurry, the lower the ink. The more serious the infiltration