Abstract
The precise manufacturing of micro/nano structures is the key to the rapid development of flexible micro/nano systems. In this paper, a sinusoidal high-voltage alternating current (AC) power is designed for electrohydrodynamic direct-writing (EDW) technology. A push-pull converting circuit is utilized as the direct current (DC) voltage regulator power of a full-bridge inverter circuit. A single-phase full-bridge inverter circuit is used to output the controllable AC voltage, which is then boost-filtered to output the high-voltage sinusoidal AC signal. The amplitude of the output sinusoidal voltage is proportional to the input voltage and the modulation degree of the sinusoidal pulse width modulation (SPWM) inverter circuit. Then, the designed sinusoidal high-voltage AC power is used in the AC EDW process to print micro-droplets. The deposition frequency and the average diameter of droplets can be effectively controlled by adjusting the voltage amplitude and the voltage frequency. The design of this sinusoidal high-voltage AC power will promote research on the applications of EDW technology in the field of micro/nano manufacturing.
Highlights
The rapid development of flexible micro/nano systems has enabled higher requirements for the precise integration printing of micro/nano structures [1,2,3,4]
The stable motion stage of the jet is achieved by reducing the distance between the nozzle and collector for the accurate controllable deposition of a micro/nano structure, which has become an important potential method for the application of organic and flexible device manufacturing with great advantages of high resolution, simple process and good material compatibility [5,6]
electrohydrodynamic direct-writing (EDW) technology uses an external electric field to deform the viscous solution into a Taylor cone for the printing of micro/nano structures
Summary
The rapid development of flexible micro/nano systems has enabled higher requirements for the precise integration printing of micro/nano structures [1,2,3,4]. Compared to the traditional ink-jet printing technology driven by internal pressure, electrohydrodynamic direct-writing (EDW) technology applies an external electric field force to stretch the polymer solution into a fine jet. The stable motion stage of the jet is achieved by reducing the distance between the nozzle and collector for the accurate controllable deposition of a micro/nano structure, which has become an important potential method for the application of organic and flexible device manufacturing with great advantages of high resolution, simple process and good material compatibility [5,6]. When the electric field force on the Taylor cone is large enough to overcome the surface tension of the liquid, the jet is ejected from the tip of the Taylor cone and deposited onto the collector to achieve micro/nano patterns [7,8]. Coppola et al [9,10] promoted
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