Control of adhesion force for micro LED transfer using a magnetorheological elastomer

Kim, Ji-Hun; Kim, Byung-Chan; Lim, Dongwook; Shin, Bong-Cheol

doi:10.1007/s12206-019-1024-4

Cited by 17 publications

(19 citation statements)

References 7 publications

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“…in 2019 used magnetorheological stamps and controlled the adhesion force by the varying magnetic field during the pick and place. [ 88 ] In 2020, Lu et al. optimized the stamp transfer technology by utilizing the support vector model.…”

Section: Assembling Technologies For Mass Production Of Micro‐leds Di...mentioning

confidence: 99%

Recent Progress in Micro‐LED‐Based Display Technologies

Sajjad

Johar

Hernández-Gutiérrez

et al. 2022

Laser & Photonics Reviews

142

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The demand for high-performance displays is continuously increasing because of their wide range of applications in smart devices (smartphones/watches), augmented reality, virtual reality, and naked eye 3D projection. High-resolution, transparent, and flexible displays are the main types of display to be used in future. In the above scenario, the micro-LEDs (light-emitting diodes) display which has outstanding features, such as low power consumption, wider color gamut, longer lifetime, and short response-time, can replace traditional liquid crystal displays and organic LEDs-based display technologies. However, to attain a remarkable position in future display technology, the micro-LEDs need to overcome problems associated with mass transfer and its high cost of manufacturing. Besides micro-LEDs, the other option for future displays includes the usage of color conversion medium (phosphor/ quantum dots) to convert some of the blue light into other colors. In this review, the various mass transfer display technologies and color conversion strategies which are being used for the realization of a full-color display are discussed.

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Section: Assembling Technologies For Mass Production Of Micro‐leds Di...mentioning

confidence: 99%

Recent Progress in Micro‐LED‐Based Display Technologies

Sajjad

Johar

Hernández-Gutiérrez

et al. 2022

Laser & Photonics Reviews

142

View full text Add to dashboard Cite

show abstract

“…In 2017, Radauscher et al used elastomer stamp technology to manufacture active and passive color micro-LED arrays and proved that this method has a high transfer yield greater than 99.99% [ 11 ]. In 2019, Kim et al found that elastomer stamp transfer technology controls the adhesion force of the stamp by changing the contact force or peeling speed of the polymer stamp but has a problem of repeatability [ 40 ]. Therefore, the authors chose to use a magnetorheological elastomer as the stamp and controlled the adsorption force by changing the magnetic field near the stamp during the transfer.…”

Section: Chip Transfer and Bondingmentioning

confidence: 99%

Full-Color Realization of Micro-LED Displays

et al. 2020

Nanomaterials

141

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Emerging technologies, such as smart wearable devices, augmented reality (AR)/virtual reality (VR) displays, and naked-eye 3D projection, have gradually entered our lives, accompanied by an urgent market demand for high-end display technologies. Ultra-high-resolution displays, flexible displays, and transparent displays are all important types of future display technology, and traditional display technology cannot meet the relevant requirements. Micro-light-emitting diodes (micro-LEDs), which have the advantages of a high contrast, a short response time, a wide color gamut, low power consumption, and a long life, are expected to replace traditional liquid-crystal displays (LCD) and organic light-emitting diodes (OLED) screens and become the leaders in the next generation of display technology. However, there are two major obstacles to moving micro-LEDs from the laboratory to the commercial market. One is improving the yield rate and reducing the cost of the mass transfer of micro-LEDs, and the other is realizing a full-color display using micro-LED chips. This review will outline the three main methods for applying current micro-LED full-color displays, red, green, and blue (RGB) three-color micro-LED transfer technology, color conversion technology, and single-chip multi-color growth technology, to summarize present-day micro-LED full-color display technologies and help guide the follow-up research.

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“…One novel application area of MR fluids and MR elastomers is a solution for changing the adhesion of a material under the influence of a magnetic field. A chip transporter using MR elastomers is proposed in [24]. MR fluids also can be used as part of soft gripper due to their ability to change adhesion characteristics under the influence of magnetic fields [25].…”

Section: Application Of Mr Materials In Soft Robots 31 Absorbers Sementioning

confidence: 99%

“…Depending on the property of MR materials used, these materials can act as various elements of a soft robot [7,[24][25][26][27][28][29][30]. In [28], a gripper based on MR fluid is proposed, which is capable of holding objects of various shapes.…”

Section: Stiffness Changementioning

confidence: 99%

State of the art of soft robotic applications based on magneto-rheological materials

Gutenko

2020

MATEC Web Conf.

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Soft robotics is a new and exciting field of robotics which heavily relies on compliant materials. Soft robots attempt to copy the motion of living organisms and their adaptation mechanisms to the environment. New efforts in this field have paved way for the use of specific materials, e.g. electroactive polymers and/or magnetoactive (magnetorheological) MR elastomers. In this paper the author discusses the fundamental characteristics of MR fluids and elastomers, that allow them to be used as elements/components of soft robots. The advantages of using soft robots and the scope of applications for such robots are presented. The advantages and disadvantages of using MR fluids and elastomers in such soft robots are also considered. The history of the development of the idea of using MR fluids and elastomers in soft robots is presented, too. Possible applications for soft robots based on MR fluids and elastomers are considered. Various solutions for constructing a robotic gripper using MR fluids and elastomers are presented. Based on the above solutions, an analysis is made of the development of such technologies and the main problems are identified that will be the goal of solving them in the near future.

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Control of adhesion force for micro LED transfer using a magnetorheological elastomer

Cited by 17 publications

References 7 publications

Recent Progress in Micro‐LED‐Based Display Technologies

Recent Progress in Micro‐LED‐Based Display Technologies

Full-Color Realization of Micro-LED Displays

State of the art of soft robotic applications based on magneto-rheological materials

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