Electric field-flow field mixed controlled electrofluid jet printing method and device

Abstract

The invention discloses an electric field-flow field mixed controlled electrofluid jet printing method and device and belongs to the technical field of micro / nano fabrication. According to the electric field-flow field mixed controlled electrofluid jet printing method and device, a sprayer outlet pipe is a capillary pipe; a fluid outlet with a chamfering angle is formed in the lower part of the capillary pipe; fluid around the capillary pipe forms a focused stable fluid flow field below a sprayer under the chamfering action of the fluid outlet; a grounding electrode is arranged below the fluidoutlet; a through hole coaxial with the fluid outlet is formed in the grounding electrode; a high voltage static electric field is applied between the sprayer and the grounding electrode; electrofluid flowing out of the capillary pipe forms Taylor Cone and pulls out a jet flow under the combined action of the high voltage static electric field and the fluid flow field; and the jet flow penetratesthrough the fluid outlet and the through hole for printing. According to the electric field-flow field mixed controlled electrofluid jet printing method and device, the electric current jet printingtechnology and the flowing focusing technology are combined to improve the printing precision and resolution ratio and solve the problem that general electrofluid jet printing cannot print on an insulating base plate or the base plate with a free hook face.

Description

technical field [0001] The invention belongs to the technical field of micro-nano manufacturing, and more specifically relates to an electrofluid jet printing method and device controlled by electric field-flow field mixing. Background technique [0002] Complex micro-nano functional structures can be used in many fields, such as flexible displays, printing / organic / flexible electronic devices, multifunctional sensors, etc. Therefore, their preparation processes have attracted much attention in recent years. Inkjet printing, as a non-contact patterning process, can deposit micro-scale structures on substrates, and compared with photolithographic patterning processes, it has the advantages of no mask, material saving, environmental friendliness, and convenient operation, so it is considered to be the The best solution. [0003] However, traditional inkjet printing technologies (such as piezoelectric printing and thermal foam printing) usually have a minimum resolution of 20 μ...

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Problems solved by technology

[0006] In view of the above defects of traditional inkjet printing technology and the improvement needs of electrofluid jet printing technology, the present invention provides an electrofluid jet printing device and method controlled by electric field-flow field mixing, and its purpose is to combine electrofluid jet printing technology and Combined with the flow focusing technology, the jet formed by the nozzle is narrowed by the focusing effect of the external fluid, so as to achieve higher precision and higher resolution printing, and overcome the inability of conventional electrofluid jet printing to print on insulating substrates or free-form substrates. question

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