Low-temperature auxiliary electronic jet printing method

Abstract

The invention provides a low-temperature auxiliary electronic jet printing method, and belongs to the technical field of advanced manufacturing. During electronic jet printing, a spray needle is directly connected with a liquid storage pipe and a clamping cap, and the spray needle is made of an insulating material and is subjected to outer side hydrophobic treatment; and a precise fixing groove isformed in a device, so that the liquid storage pipe and the spray needle are precisely positioned. Meanwhile, an eddy current refrigerator is used for refrigerating the printing environment, an eddycurrent pipe is fixed to the side wall of a spray head body, a jet flow guide pipe is aligned with the tail end of the spray needle, a substrate guide pipe is connected with a channel in a printing base plate, after air is compressed and cooled through the eddy current pipe, cooling of the whole electrofluid jet printing process can be finally achieved so that the viscosity of ink after printing can be rapidly increased, and printing liquid drops are prevented from spreading on a substrate. According to the method, the ink flow stability in the electrofluid jet printing process is improved, the phenomenon of spreading of the printing liquid drops is avoided, the problems of glue climbing, breakdown, scatter points and the like in the printing process are solved, and large depth-to-width ratio and high-precision printing manufacturing of high-viscosity ink materials are realized.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology, and relates to a low-temperature auxiliary electric jet printing method. Background technique [0002] Electrofluid jet printing has attracted the attention of researchers for its high-resolution manufacturing capabilities. This technology can effectively overcome the limitation of nozzle size on resolution in inkjet printing and extrusion printing, and is compatible with a variety of ink materials, such as silicone adhesives. agent, photoresist, conductive silver paste, thermosetting adhesive, UV adhesive and biomaterials, etc., can be widely used in semiconductor chip packaging, flexible microelectronic devices, photovoltaic cell silver grid, camera module bonding and tissue engineering scaffolds Processing and manufacturing. [0003] At present, when electrofluid jetting is used to print high-viscosity materials, the ink material is generally heated in advance, or a nozzle dev...

AI Technical Summary

Problems solved by technology

When electrojet printing on an insulating substrate, on the one hand, the interaction between the metal nozzle with high voltage, the charged droplet with the same polarity, and the insulating substrate distorts the original electric field, resulting in jet divergence and The droplet deviates from the expected trajectory, and the droplet is easily broken due to the Coulomb repulsion in the area close to the substrate to produce satellite droplets, causing a flow break and destroying the stability of electrofluid jet printing; on the other hand, under the action of a strong electric field , the insulating substrate can maintain the electric polarization state for a long time, and has a slow charge decay rate. The dropped droplet cannot release the charge carried by the droplet with the help of the insulating substrate. The droplet is charged with the same polarity to generate Coulomb repulsion, which causes the droplet to deform

Images