Inkjet jet failures detection and droplets speed monitoring using piezo self-sensing

Wang, Li; Wang, Keke; Hu, Hangfeng; Luo, Yu; Chen, Lijia; Chen, Shenggui; Lu, Bingheng

doi:10.1016/j.sna.2020.112178

Cited by 10 publications

(5 citation statements)

References 28 publications

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“…Self-sensing signals can detect various jet defects with various causes, such as ink viscosity changes due to temperature changes, air bubble entrapment, nozzle blockage, and wetting on the nozzle plates . Other groups have reported similar results. , …”

Section: Introductionmentioning

confidence: 86%

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Recent Advances in Real-Time Inkjet Monitoring Techniques Based on Piezo Self-Sensing Signals

Park

Kwon

2022

ACS Appl. Electron. Mater.

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Inkjet technology has been used in the manufacturing process due to its high throughput using multiple nozzles for simultaneous jetting. However, not all nozzles are in good condition, and misfiring nozzles should be excluded from the printing process. Moreover, the condition of some nozzles may change even during the printing process. Thus, real-time monitoring of the whole nozzle status is one of the important issues in an inkjet-based manufacturing process. In this Spotlight, we discuss recent advances in real-time inkjet monitoring methods based on piezo self-sensing signals. To improve the monitoring algorithm and verify the proposed method, the analysis results of long-term jet behavior are presented. Based on scatter plots of more than 140,000 jetting cases, the influence of parameters on the reliability of monitoring was also investigated. Finally, the prospects for real-time inkjet monitoring techniques based on our current advances will be discussed.

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Section: Introductionmentioning

confidence: 86%

“…9 Other groups have reported similar results. 10,11 To verify the monitoring capability, the visualized jet images were compared. 7−9 In this case, it was necessary to control the position of the camera lens system in order to obtain jet images of the nozzle of interest.…”

Section: ■ Introductionmentioning

confidence: 99%

Recent Advances in Real-Time Inkjet Monitoring Techniques Based on Piezo Self-Sensing Signals

Park

Kwon

2022

ACS Appl. Electron. Mater.

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“…Excessively high backpressure (more negative) can cause air to be entrapped in the ink chamber, and the proliferation of the air bubbles will disturb the acoustic waves and lead to jetting failure or disordered drops. [ 135 ] On the contrary, insufficient backpressure (reaching positive values) will induce ink build up on the nozzle plate. [ 136 ] Prolonged nozzle wetting can cause droplets to drift apart at low velocity, and finally, the jetting will no longer be observed (Figure 12c).…”

Section: Printing Specificationsmentioning

confidence: 99%

Inkjet Printing Optimization: Toward Realization of High‐Resolution Printed Electronics

Kamarudin,

Abdul Aziz,

Lee

et al. 2024

Adv Materials Technologies

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The printed electronics (PEs) market has witnessed substantial growth, reaching a valuation of USD 10.47 billion in the previous year. Driven by its extensive use in a multitude of applications, this growth trend is expected to continue with a projected compound annual growth rate of 22.3% from 2022 to 2032. Compared to screen printing, the adoption of inkjet printing (IJP) technology to manufacture PEs has been limited to laboratory‐scale research only. The fact that IJP's inability to maintain consistent high‐resolution quality over large printing areas has made transitioning IJP for commercial production arduous. Most of the previous literatures have focused on holistic discussion on material design for IJP, but this review provides insight into key aspects in material processing up to printing optimization to realize high‐resolution PEs. This review also highlights the challenges in controlling the functional ink properties and their interaction with the substrate as well as printing parameters to deliver the desired quality of the droplets and final prints. Imminent application of IJP in PEs and future perspectives are also included in this review.

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“…Piezoelectric microjet is a kind of micro-droplet injection technology based on piezoelectric drive, through which fluid is ejected into tiny droplets, and droplets can be ejected on demand [1,2]. It has outstanding advantages such as high injection precision, fast response speed, high efficiency, and a wide range of injection materials [3,4], and has been widely used in many industrial fields, such as microelectronic manufacturing [5], medical [6], chemistry [7], biology [6,8], space bearing lubrication [9], underwater drive [10], microfluid filtration [11], additive manufacturing [12][13][14], etc.…”

Section: Introductionmentioning

confidence: 99%

Research on Self-Priming Piezoelectric Microjet and Its Ejection Performance Control

Shan

Zhou³

et al. 2023

Actuators

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The inkjet printing technology, based on piezoelectric microjet, realizes the high-efficiency processing of special-shaped structures, and has the advantages of high precision, high efficiency, and the ability to manufacture arbitrary complex parts. In this paper, a self-priming piezoelectric micro-jet device is proposed and its structure and microjet process are described. ANSYS two-phase two-way fluid-structure coupling simulation analysis is carried out, and the mechanism of the piezoelectric microjet is described in detail. The effects of voltage amplitude, input signal frequency, nozzle diameter, and oil viscosity on the ejection performance of the device are studied, and a set of effective control methods are summarized. Finally, the correctness of the piezoelectric microjet mechanism and the feasibility of the proposed self-priming piezoelectric micro-jet device are verified by experiments, and its ejection performance is tested. The experimental results are consistent with the ANSYS simulation results, which verifies the correctness of the experiment.

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Inkjet jet failures detection and droplets speed monitoring using piezo self-sensing

Cited by 10 publications

References 28 publications

Recent Advances in Real-Time Inkjet Monitoring Techniques Based on Piezo Self-Sensing Signals

Recent Advances in Real-Time Inkjet Monitoring Techniques Based on Piezo Self-Sensing Signals

Inkjet Printing Optimization: Toward Realization of High‐Resolution Printed Electronics

Research on Self-Priming Piezoelectric Microjet and Its Ejection Performance Control

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