Post-treatment method for improving printing evenness of electronic material

An electronic material and flatness technology, applied in the post-processing of printing, printing, etc., can solve problems such as lack of electrical properties, elongated production line, and reduced electrical performance of inkjet printing devices, so as to reduce unevenness and improve quality Effect

Active Publication Date: 2012-07-04
SUZHOU NAFANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Soak the polyimide film successively in ethanol, isopropanol and water for 10-30 minutes, and blow it dry with high-purity nitrogen after taking it out. Using this film as a flexible substrate, PEDOT-PSS aqueous solution with a solid content of about 1.3% was printed by piezoelectric inkjet method to obtain electrode patterns with length, width and thickness of 1200 μm, 500 μm and 10 μm, respectively. During the printing process, the temperature of the working table is kept at normal temperature, and the movement speed is slowed down as much as possible to ensure the quality of the liquid film.

[0027] Put the product that has completed the above steps into a freeze dryer, and freeze-dry the sample under a vacuum condition of 50-100Pa. The temperature of the shelf in the equipment is controlled between -15°C and -20°C, and the reaction time is controlled at 0.5- within 5 minutes. After the sample was thawed, the concentration of PEDOT-PSS increased significantly, the ...

Embodiment 2

[0029] Glass slices cut into 3cm long and 5cm wide are soaked in ethanol, isopropanol and water for 10-30 minutes, and then blown dry with high-purity nitrogen. Using this glass sheet as the substrate, using nano-silver ink with a solid content of about 5% and a water-glycol mixed solvent, the length, width and thickness of 2000 microns, 400 microns and 12 micron electrode pattern. During the printing process, the temperature of the working table is kept at normal temperature, and the movement speed is maintained at 0.5-2 mm per second to ensure the quality of the liquid film.

[0030] Put the product that has completed the above steps into a freeze dryer, and freeze-dry the sample under 20-50Pa vacuum conditions. The temperature of the shelf in the equipment is controlled between -20°C and -30°C, and the reaction time is controlled at 2- within 10 minutes. After the sample was thawed, the concentration of the silver ink increased significantly, and the solid content reached...

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PUM

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Abstract

The invention relates to a post-treatment method for improving printing evenness of an electronic material, which generally means a solvent part removing process of inhibiting the ink liquidity through cooling measures, wherein low temperature drying treatment is performed for the electronic material on a substrate by ink-jet printing to reduce or remove the solvent part in a liquid film, the temperature range of low temperature drying treatment is below -5 DEG C and the solvent part during treatment is solid or liquid. 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 requirement. The post-treatment process of the invention has remarkable effect. In brief, through the low temperature drying treatment, unevenness of electronic films prepared by ink-jet printing can be effectively eliminated or reduced based on current electronic ink and printing process so that the post-treatment method of improving the printing evenness of the electronic material is beneficial to improving 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M7/00B41J2/01
Inventor 林剑陈征崔铮
Owner SUZHOU NAFANG TECH DEV
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