A kind of inkjet printing system and its application

Abstract

The invention discloses an ink-jet printing system which comprises an atomization device, a liquid drop size screening device and a printing nozzle. The atomization device is used for preparing aerosols, the liquid drop size screening device is arranged between the atomization device and the printing nozzle, an input opening and two output openings are formed in the liquid drop size screening device, the input opening is communicated with the output end of the atomization device, the first output opening is communicated with the printing nozzle, the second output opening is connected with the atomization device in an inversed mode, after screening is carried out through the liquid drop size screening device, the aerosols in the appropriate liquid drop sizes enter the first output opening, and the rest of the aerosols enter the second output opening. According to the ink-jet printing system, the liquid drop size screening device is additionally arranged between the atomization device and the printing nozzle, controllable adjustment on the liquid drop size of the aerosols jetted by the printing nozzle is achieved, and the printing accuracy is guaranteed. The advantages of the aerosol printing technology are reserved, the disadvantages of the aerosol printing technology are overcome, new thinking and methods are provided for ink-jet printing, and the ink-jet printing system is particularly suitable for superfine and high-accuracy printing on solar cell grid lines.

Description

Technical field [0001] This application relates to the field of printing equipment, and in particular to an inkjet printing system and its applications. Background technique [0002] Since the inkjet printing technology was proposed, many different specific printing technologies have been developed. According to the droplet formation method of printing, it can be divided into two categories: droplet jet printing and aerosol printing. [0003] Droplet jet printing refers to ejecting the ink to be printed onto the substrate to be printed in the form of droplets. Droplet jet printing can be divided into two types: continuous on-demand. The continuous type refers to the continuous ejection of ink droplets, where the ink droplets are printed on the substrate where there are patterns, and the deflection device is used to recover the ink droplets where there are no patterns. On-demand type means that ink is jetted where there is a pattern, and no ink is jetted where there is no pattern...

AI Technical Summary

Problems solved by technology

[0006] The traditional screen printing process to prepare silver grid lines mainly has the following problems: first, the silicon wafer needs to be pressed during the printing process, and the use of silicon wafers with a thickness of less than 100 microns is likely to cause an increase in the failure rate; second, The resolution of screen printing is low, and the aspect ratio of printed silver lines is low

However, as mentioned earlier, inkjet printing still has some deficiencies. Among them, droplet jet printing is easy to cause ink droplets to block the nozzle, and aerosol printing has the defect of insufficient precision.

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