High-Precision Printing Force Control System for Roll-to-Roll Manufacturing

Choi, Yun‐Jaie; Kang, Dongwoo; Lim, Sung-Soo; Lee, Moon Gu; Lee, Seung–Hyun

doi:10.1109/tmech.2017.2724578

Cited by 15 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An automatic alignment produce was developed by using the forces measured by the load cells as feedback. The improved alignment was implemented by applying two-step displacements, and the difference in the contact forces between each end was within 0.3 N. Vibrations of less than approximately 2 µm peak-to-peak was confirmed under the no-load condition and of less than approximately 5 µm peak-to-peak was observed under a rotation speed of 30 rev/min and a load of 300 N. This vibration is very small compared to the vibration of 10-100 µm peak-to-peak of conventional printing rollers supported by ball bearings [13].…”

Section: Discussionmentioning

confidence: 71%

“…The effectiveness of the automatic alignment of the roller was tested using a prescale film (LLW, Fujifilm Co., Tokyo, Japan), which can visually confirm the force distribution of the roller ( Figure 17a). The prescale film is a kind of pressure-sensitive film that changes color depending on the pressing force [13]. This sort of automatic alignment could be practically realized by attaching load beneath the base plate of the printing equipment shown in Figure 17a.…”

Section: Prescale Film Testmentioning

confidence: 99%

“…The printing force applied by rollers must be uniform to improve the printing quality. For this, many additional devices are required, including various force and position sensors, pneumatic or hydraulic actuators, linear motors, and voice coil motors, which make the structure of the printing equipment complicated and more expensive while still requiring periodic re-calibration [13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-Precision Roller Supported by Active Magnetic Bearings

Park

Yoon²,

Kang

et al. 2019

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Featured Application: Printing machines, Roller conveyors, Cleanroom applications.Abstract: Magnetic bearings support rotors in a non-contact way using magnetic force. Therefore, there is no friction and it is possible to measure and control the position of a rotor in the air gap. In this study, the rotational vibration of a roller was minimized using magnetic bearings, and a precision roller capable of automatic alignment using the position control function of magnetic bearings was proposed. A rotation accuracy of approximately 4.6 µm (peak-to-peak) was observed, even under a rotation of 30 rev/min and a radial force load of 300 N. The rotor position control experiment for magnetic bearings showed that 1-µm resolution position control is possible. To further improve the accuracy, the automatic alignment algorithm was proposed using magnetic bearings for the roller misalignment condition, and it was confirmed that alignment is possible at a level that the pressing force difference between both ends of the roller is within 0.3 N. Through this study, it was confirmed that rollers with magnetic bearings can be applied to precision equipment. It is expected that the implementation of the automatic alignment function will simplify the equipment configuration and maintenance compared to conventional rollers with ball bearings.

show abstract

Section: Discussionmentioning

confidence: 71%

Section: Prescale Film Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-Precision Roller Supported by Active Magnetic Bearings

Park

Yoon²,

Kang

et al. 2019

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…Researcher also designed two matching plate flexures on the two ends of the printer roller to control the tilting and positioning of the print roller. 117,118 The print resolution is up to 500 nm (linewidth) based on this design. Alternatively, a high-precision roller supported by active magnetic bearings was proposed.…”

Section: Imprinting Roller Systemsmentioning

confidence: 99%

Continuous roller nanoimprinting: next generation lithography

Peng¹,

Zhang²,

Choi³

et al. 2023

Nanoscale

View full text Add to dashboard Cite

show abstract

“…87) Regulating the transport velocity and tension of the web to retain superior product quality is the primary task of R2R systems, which is not negligible owing to the strong nonlinearities encountered. [88][89][90][91] Previous studies found that Vertical to prints direction 41 μm Specific resistance (connectivity) -higher viscosity ink -higher print speed -lower aspect ratio of the cell Waviness -aspect ratio of 0.16 ± 0.022 Thickness -ink viscosity -lower aspect ratio of cell -higher print speed Line widening -higher ink viscosity -higher print speed -higher aspect ratio of cell Surface roughness -lower viscosity -higher aspect ratio of cell -higher print speed the basis of the error in registration is the disturbance in web tension, and these are in turn triggered by the thermal disturbance from the dryer. 92) The inconsistency in web tension can cause the unpredictable performance of printed electronic devices throughout the width of the web, and extreme inconsistency in web tension can cause web wrinkling.…”

Section: Web Tensionmentioning

confidence: 99%

Fully roll-to-roll gravure printed electronics: challenges and the way to integrating logic gates

Tiara

Moon

Cho

et al. 2022

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Printed electronics have been considered to bring about the ICT (Information Communication Technology) revolution. The high-throughput production of the ultra-low-cost printed devices along with the level of integration of logic gates via an all roll-to-roll (R2R) printing method has been the major axes in the revolution. However, there have been certain concerns related to the integration of logic gates via the R2R printing methods. This review paper focuses on the key issues that must be resolved to maintain a uniform threshold voltage (V th) value, which can otherwise impede the commercial viability of such devices. Amongst the various factors contributing to the ΔV th value, the ink rheology, web handling, and the disparity in alignment amongst the drain-source electrodes and the gate electrodes due to the limitations of an overlay printing registration accuracy (OPRA) were reviewed to effectively control the variations during the R2R printing process, without including the material’s intrinsic instability factors. Accordingly, a unique design rule for the R2R printing foundry concept was introduced for manufacturing the devices with the available integration level of the logic gates, incorporating the printing parameters including ink rheology, ink transfer, web handling, and OPRA.

show abstract

High-Precision Printing Force Control System for Roll-to-Roll Manufacturing

Cited by 15 publications

References 16 publications

High-Precision Roller Supported by Active Magnetic Bearings

High-Precision Roller Supported by Active Magnetic Bearings

Continuous roller nanoimprinting: next generation lithography

Fully roll-to-roll gravure printed electronics: challenges and the way to integrating logic gates

Contact Info

Product

Resources

About