A post-processing method for improving the printing flatness of electronic materials

Abstract

The invention relates to a low-temperature drying process for an electronic material liquid film printed on a substrate by inkjet to reduce or remove the solvent part in the liquid film, wherein the temperature range of the low-temperature drying process is below minus 5°C, generally referring to Measures to suppress ink fluidity by removing the solvent portion of the process, which is in solid or liquid state during processing. And the low-temperature drying treatment only removes part of the solvent in the liquid film, and the proportion of the removed part of the solvent meets the standard film-forming quality. The effect of implementing the post-treatment process of the present invention is remarkable. In short, through low-temperature drying treatment, the unevenness in the electronic film prepared by inkjet printing can be effectively eliminated or reduced on the basis of the existing electronic ink and printing process. It is conducive to the improvement of the quality of printed electronic products.

Description

technical field [0001] The invention relates to a liquid film printing forming process, in particular to a post-printing treatment method for increasing the flatness of inkjet printing of electronic materials to eliminate the unevenness of the liquid film of electronic materials. Background technique [0002] Inkjet printing refers to a printing process in which ink is ejected onto a substrate under computer control to form a pattern. Because inkjet printing does not require pre-plate making, and the nozzle itself does not directly contact the substrate during the printing process, this method has gained widespread attention in the field of printed electronics. Compared with other contact printing processes, inkjet printing has the following advantages in the production of printed electronics. [0003] 1. Inkjet printing can complete the printing of ink without contact with the printing material. On the one hand, this significantly reduces the limitations of the traditiona...

AI Technical Summary

Problems solved by technology

[0007] 5. For traditional plate printing, one printing plate usually can only print one material, and the overprinting of multiple materials can only be realized through multi-plate overprinting. The production line is forced to be stretched and precise registration is required between the printing plates allow

However, these additive materials usually do not have good electrical properties, which may further reduce the electrical properties of devices prepared by inkjet printing.

Although the rapid heating method can theoretically improve the flatness of the film, it may introduce a large number of defects in the electronic material and affect the performance of the device.