Punctate pattern ink-jet printing system and method

Abstract

The invention discloses a punctate pattern ink-jet printing system and method. The system comprises a printing substrate, a nozzle device and a rotary shaft. The nozzle device is arranged above the printing substrate and comprises an ink printing nozzle, solvent printing nozzles and a printing nozzle moving assembly. The ink printing nozzle and the solvent printing nozzles are mounted on the printing nozzle moving assembly. The rotary shaft is connected with the printing nozzle moving assembly. According to an evaporitic micro-environment form control mechanism, by printing an ink pattern andsolvent patterns simultaneously, solvents evaporate finally, the ink print patter is left only, ink evaporation is affected by solvent evaporation, and the purpose of form control can be achieved at last, so that the problem of 'coffer-ring' occurring to punctate pattern ink-jet printing is solved, and the different ink even form printing demands are met.

Description

technical field [0001] The invention belongs to the field of preparation of printed electronic devices, and in particular relates to an inkjet printing system and an inkjet printing method for dot graphics. Background technique [0002] The existing inkjet printing thin film morphology control technology is mostly based on the suppression of the "coffee ring" effect of a single droplet, which changes the shape of the dried droplet. Under the premise of the pinning of the three-phase line of the droplet, the solvent evaporation at the edge of the droplet is much greater than the volume loss of the liquid, so the solvent replenishes from the center area to the edge to form an outward capillary flow, so that the solute gathers at the edge to form a "coffee ring" . There are many ways to control it, including changing the composition of the ink, the state of the substrate, and adding special equipment to inhibit and eliminate the "coffee ring" in each process of formation; the ...

AI Technical Summary

Problems solved by technology

[0003] However, it is very difficult to control the "coffee ring" effect in the existing technology: (1) The adjustment of ink components involves complex physical and chemical processes. Its exploration will consume a lot of research costs; (2) substrate treatment often involves additional processes, which weakens the advantages of inkjet printing; (3) the addition of auxiliary equipment, the deposition uniformity is disturbed by human factors, for micron-scale The requirements for printing graphics equipment are too high, and different printing graphics have different requirements for auxiliary equipment, which will greatly increase the cost and complexity of the adjustment process; (4) fast curing, such as the photonic sintering equipment required for it is expensive and fast The curing function needs to be integrated with the printing device in order to maximize its advantages, which is difficult to implement under current circumstances

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