Electrohydrodynamic Inkjet Printing for High-Resolution Microstructures
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Solution Overview
Problem
Conventional inkjet printing technologies face limitations such as low resolution, nozzle clogging with high viscosity solutions, complex nozzle manufacturing, low efficiency in printing large-area films and microstructures, and the inability to produce point-like, line-like, or film-like structures.
Innovation Solution
A multifunctional electrohydrodynamic inkjet printing device capable of micron/submicron point-like structure jet printing, direct writing of micron/submicron line-like structures, and nano film spraying, utilizing a support part with a jet printing module, substrate bearing and moving module, and roll-to-roll thin film conveying module, with adjustable nozzle distance, fluid flow, and voltage control for various printing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional inkjet printing is used, then the printing process is simple, but the resolution is low and droplet size is limited by nozzle diameter
Solution Approach 1:
The patent replaces the conventional mechanical inkjet printing system with an electrohydrodynamic printing system that uses electric fields to control droplet formation and ejection. This substitution enables higher resolution printing without being constrained by physical nozzle dimensions, as the electric field can manipulate fluid at micro and nanoscale levels.
Solution Approach 2:
The patent changes the fundamental operating parameters of inkjet printing by introducing high voltage electric fields and controlling fluid ejection through electrohydrodynamic forces rather than mechanical pressure. This parameter change allows for precise control of droplet size and placement, achieving higher resolution while maintaining system feasibility.
2Reliability
If conventional inkjet printing is used, then the nozzle structure is simple, but high viscosity solutions block the nozzle
Solution Approach 1:
The patent replaces the mechanical nozzle structure with an electrohydrodynamic ejection system that uses electric fields to propel fluid. This eliminates the physical nozzle aperture that is prone to clogging, allowing high viscosity solutions to be ejected through controlled electric field forces without mechanical obstruction.
Solution Approach 2:
The patent introduces an electric field as an intermediary between the fluid reservoir and the substrate, replacing the direct mechanical nozzle pathway. This intermediary electric field enables fluid ejection without physical contact or narrow apertures, preventing clogging while maintaining ejection capability for viscous materials.
3Adaptability or versatility
If conventional inkjet printing is used, then the printing mode is single, but it cannot produce point-like, line-like, or film-like structures
Solution Approach 1:
The patent creates a universal electrohydrodynamic printing system that can perform multiple printing functions (point-like structure, line-like structure, and film-like structure deposition) through a single integrated platform. By controlling electric field parameters and substrate movement, the system adapts to produce different structure types without requiring separate printing modes or equipment.
Solution Approach 2:
The patent introduces dynamic control elements including movable substrates and adjustable electric field parameters that enable the system to switch between different printing modes on demand. The substrate can move at controlled speeds and the electric field strength can be modulated, allowing seamless transition between point, line, and film deposition to maintain high productivity across diverse printing tasks.
4Productivity
If conventional inkjet printing is used, then the equipment is simple, but printing efficiency for large-area film and microstructure is low
Solution Approach 1:
The patent implements preliminary action by pre-positioning the substrate on a movable platform and pre-establishing the electrohydrodynamic ejection parameters before printing begins. The substrate movement is coordinated in advance with the ejection pattern, allowing continuous high-speed printing across large areas without repeated positioning adjustments, thereby significantly improving printing efficiency.
Solution Approach 2:
The patent achieves continuity of useful action through the movable substrate system that enables uninterrupted printing across large areas. The electrohydrodynamic ejection operates continuously as the substrate moves through the electric field, eliminating the start-stop nature of conventional inkjet printing and maintaining constant deposition rate for both large-area films and microstructures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables high-precision, efficient printing of diverse components and patterns on both rigid and flexible substrates, overcoming nozzle diameter limitations and viscosity issues, with real-time observation and temperature control for stability.
Implementation Method 1
a jet printing module fixed on the support part and comprising a nozzle for ejecting printing fluid onto a substrate for pattern printing
Implementation Method 2
employing electrostatic forces for high precision and viscosity handling
Implementation Method 3
enables high-precision, efficient printing of diverse components and patterns on both rigid and flexible substrates
Data Source
AI summary
An electrohydrodynamic inkjet printing device, including: a support part; a jet printing module; a substrate bearing and moving module; and a roll-to-roll thin film conveying module. The jet printing module is disposed on the support part and includes a nozzle for ejecting printing fluid onto a substrate for pattern printing. The substrate bearing and moving module is disposed on the support part, and fixedly bears a rigid substrate as the substrate for pattern printing, and drives the rigid substrate to move with respect to the jet printing module. The roll-to-roll thin film conveying module is disposed on the support part, and transfers a flexible thin film as the substrate for pattern printing, and drives the flexible film to move with respect to the jet printing module.