Coaxial focusing electro stream printing method

Abstract

The invention relates to a coaxial focusing electro stream printing method, belongs to the technical field of advanced manufacture and relates to a coaxial focusing electro stream printing method. According to the method, in the coaxial focusing electro stream printing process, two kinds of liquid are contained in a coaxial focusing electro stream printing nozzle, one kind of the liquid is a required forming material called inner function liquid, and the other kind of the liquid is an auxiliary material called outer liquid; the outer liquid and the inner function liquid are not dissolved mutually, and the viscosity of the outer liquid is larger than that of the inner function liquid. The coaxial focusing electro stream printing nozzle forms coaxial focusing jet flow with the two layers of liquid during printing and prints a bi-layer structure on a substrate; and finally, an outer printing material is removed to obtain an inner function structure. The method has the characteristics of being high in printing resolution, material adaptability and microenvironment disturbance resistance and is capable of achieving high-resolution patterned printing through a spray needle of micrometer scales at normal temperatures and pressures.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology and relates to a coaxial focusing electric jet printing method. Background technique [0002] Traditional inkjet printing methods based on piezoelectric, thermal bubble, etc., the resolution is heavily dependent on the size of the nozzle hole, the resolution is about twice the inner diameter of the nozzle, currently the inner diameter of the nozzle is 10 to 50 microns, and the printed feature size will be greater than 20 microns , so it is difficult to achieve printing with sub-micron resolution. In recent years, electrojet printing technology based on electrohydrodynamic effect has become a hotspot in high-resolution printing manufacturing. Electrojet printing is a stable and fine jet that is much smaller than the inner diameter of the needle at the outlet of the needle under the combined action of electric field force, mechanical force, and fluid surface tension. This jet is use...

AI Technical Summary

Problems solved by technology

In the single cone-jet mode, the tangential force of the electric field applied to the jet is limited, resulting in a limited size of the jet, and its printing resolution is limited to the micron scale, and it is difficult to further improve the printing resolution

In addition, the existing single-cone-jet printing technology improves the printing resolution by continuously reducing the inner diameter of the nozzle, which will lead to poor adaptability to the ink, such as high viscosity and high concentration ink will cause nozzle clogging

Moreover, when printing in this mode, the jet flow is easily disturbed by the microenvironment such as ambient temperature, humidity, vibration, etc., resulting in unstable jet flow, which in turn affects the printing accuracy and controllability

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