A Preliminary Study of PDMS Stamp towards Flexography Printing Technique: An Overview

Polydimethylsiloxane (PDMS) commonly used for microcontact printing is essential towards the successful introduction of high speed printing of reel-to-reel or reel-to-plate manufacturing processes. Here, it is proposed that extending flexography printing method into the multiple micro-scale printing solid line onto subtract by using PDMS stamp as a plate. Flexography is a high-speed technique commonly used for printing onto substrates in a lot of paper printing industry. It was introduces a decade ago where it is very useful for large production. In this area of printing, the expanding demand on printing electronics leads to a lot of study needed for high speed and large production of electronic industries. This work elaborates the feasibility of PDMS stamp (12in x 4in) use in flexography printing for multiple micro solid lines. It will undergo by using simple and inexpensive fabrication PDMS mold process. This paper illustrates the use of PDMS in microcontact printing fusing with flexography printing to produce multiple micro-solid line printing capability by using conductive ink as application of printing electronic industry applications.

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A Feasibility Study of Roll to Roll Printing on Graphene

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.799-800.402 ◽

2015 ◽

Vol 799-800 ◽

pp. 402-406 ◽

Cited By ~ 6

Author(s):

S. Hassan ◽

Mohd Sallehuddin Yusof ◽

M.I. Maksud ◽

M.N. Nodin ◽

Noor Azlina Rejab

Keyword(s):

High Speed ◽

Electronic Device ◽

Electronic Devices ◽

Printing Industry ◽

Micro Scale ◽

Roll To Roll ◽

Printing Technique ◽

Printing Ink ◽

Variable Substrate ◽

Printing Techniques

Roll to roll process is one of the famous printing techniques that are possible to create graphic and electronic device on variable substrate by using conductive ink. Graphene is an example of material that can be used as printing ink which usually used in producing micro-scale electronic devices. Here, it is proposed that extending roll to roll printing technique into the multiple micro-scale printing fine solid line onto substrate by using graphene as a printing ink. Flexography is a high speed roll to roll printing technique commonly used in paper printing industry. And this study elaborates the feasibility of graphene as a printing ink use in combination of flexography and micro-contact or micro-flexo printing for micro fine solid line. This paper will illustrates the review of graphene in producing multiple micro-solid lines printing capability for the application of printing electronic, graphic and bio-medical.

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Development of Real-Time Time Gated Digital (TGD) OFDR Method and Its Performance Verification

Sensors ◽

10.3390/s21144865 ◽

2021 ◽

Vol 21 (14) ◽

pp. 4865

Author(s):

Kinzo Kishida ◽

Artur Guzik ◽

Ken’ichi Nishiguchi ◽

Che-Hsien Li ◽

Daiji Azuma ◽

...

Keyword(s):

Real Time ◽

Optical Fibers ◽

High Speed ◽

Oil And Gas ◽

Scattered Light ◽

Oil And Gas Industry ◽

High Signal ◽

Chirp Pulse ◽

Sound Waves ◽

Industry Applications

Distributed acoustic sensing (DAS) in optical fibers detect dynamic strains or sound waves by measuring the phase or amplitude changes of the scattered light. This contrasts with other distributed (and more conventional) methods, such as distributed temperature (DTS) or strain (DSS), which measure quasi-static physical quantities, such as intensity spectrum of the scattered light. DAS is attracting considerable attention as it complements the conventional distributed measurements. To implement DAS in commercial applications, it is necessary to ensure a sufficiently high signal-noise ratio (SNR) for scattered light detection, suppress its deterioration along the sensing fiber, achieve lower noise floor for weak signals and, moreover, perform high-speed processing within milliseconds (or sometimes even less). In this paper, we present a new, real-time DAS, realized by using the time gated digital-optical frequency domain reflectometry (TGD-OFDR) method, in which the chirp pulse is divided into overlapping bands and assembled after digital decoding. The developed prototype NBX-S4000 generates a chirp signal with a pulse duration of 2 μs and uses a frequency sweep of 100 MHz at a repeating frequency of up to 5 kHz. It allows one to detect sound waves at an 80 km fiber distance range with spatial resolution better than a theoretically calculated value of 2.8 m in real time. The developed prototype was tested in the field in various applications, from earthquake detection and submarine cable sensing to oil and gas industry applications. All obtained results confirmed effectiveness of the method and performance, surpassing, in conventional SM fiber, other commercially available interrogators.

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Multi-Touch Interaction Generation Device by Spatiotemporally Switching Electrodes

Electronics ◽

10.3390/electronics10121475 ◽

2021 ◽

Vol 10 (12) ◽

pp. 1475

Author(s):

Masahiro Okamoto ◽

Kazuya Murao

Keyword(s):

High Speed ◽

High Accuracy ◽

Conductive Ink ◽

Control Board ◽

Touch Panel ◽

Electrode Size ◽

Touch Input ◽

Touch Interaction ◽

Multiple Electrodes ◽

Touch Panels

With the spread of devices equipped with touch panels, such as smartphones, tablets, and laptops, the opportunity for users to perform touch interaction has increased. In this paper, we constructed a device that generates multi-touch interactions to realize high-speed, continuous, or hands-free touch input on a touch panel. The proposed device consists of an electrode sheet printed with multiple electrodes using conductive ink and a voltage control board, and generates eight multi-touch interactions: tap, double-tap, long-press, press-and-tap, swipe, pinch-in, pinch-out, and rotation, by changing the capacitance of the touch panel in time and space. In preliminary experiments, we investigated the appropriate electrode size and spacing for generating multi-touch interactions, and then implemented the device. From the evaluation experiments, it was confirmed that the proposed device can generate multi-touch interactions with high accuracy. As a result, tap, press-and-tap, swipe, pinch-in, pinch-out, and rotation can be generated with a success rate of 100%. It was confirmed that all the multi-touch interactions evaluated by the proposed device could be generated with high accuracy and acceptable speed.

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LFP-Based Gravure Printed Cathodes for Lithium-Ion Printed Batteries

Membranes ◽

10.3390/membranes9060071 ◽

2019 ◽

Vol 9 (6) ◽

pp. 71 ◽

Cited By ~ 3

Author(s):

Maria Montanino ◽

Giuliano Sico ◽

Anna De Girolamo Del Mauro ◽

Margherita Moreno

Keyword(s):

Production Technology ◽

High Speed ◽

Electronic Devices ◽

Lithium Ion ◽

Gravure Printing ◽

Printing Technique

Printed batteries have undergone increased investigation in recent years because of the growing daily use of small electronic devices. With this in mind, industrial gravure printing has emerged as a suitable production technology due to its high speed and quality, and its capability to produce any shape of image. The technique is one of the most appealing for the production of functional layers for many different purposes, but it has not been highly investigated. In this study, we propose a LiFePO4 (LFP)-based gravure printed cathode for lithium-ion rechargeable printed batteries and investigate the possibility of employing this printing technique in battery manufacture.

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Current Status and Prospects of Polymer Powder 3D Printing Technologies

Materials ◽

10.3390/ma13102406 ◽

2020 ◽

Vol 13 (10) ◽

pp. 2406 ◽

Cited By ~ 5

Author(s):

Yue Wang ◽

Zhiyao Xu ◽

Dingdi Wu ◽

Jiaming Bai

Keyword(s):

3D Printing ◽

High Speed ◽

Selective Laser Sintering ◽

Advanced Technology ◽

Current Status ◽

Utilization Rate ◽

Process Selection ◽

Forming Mechanism ◽

Polymer Powder ◽

Industry Applications

3D printing technology, which greatly simplifies the manufacturing of complex parts by a two-dimensional layer-upon-layer process, has flourished in recent years. As one of the most advanced technology, polymer powder 3D printing has many advantages such as high materials utilization rate, free of support structure, great design freedom, and large available materials, which has shown great potential and prospects in various industry applications. With the launch of the Multi jet Fusion system from HP, polymer powder 3D printing has been attracting more attention from industries and researchers. In this work, a comprehensive review of the main polymer powder-based 3D printing methods including binder jetting, selective laser sintering, high-speed sintering were carried out. Their forming mechanism, advantages and drawbacks, materials, and developments were presented, compared, and discussed respectively. In addition, this paper also gives suggestions on the process selection by comparing typical equipment parameters and features of each technology.

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Conductive Microwires of Silver Nanoparticles Prepared by Microcontact Printing

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.37.36 ◽

2015 ◽

Vol 37 ◽

pp. 36-41 ◽

Cited By ~ 2

Author(s):

Shi Li Liu ◽

Zhi Qing Xin ◽

Xiu Li ◽

Bei Qing Huang ◽

Pu Jun Deng ◽

...

Keyword(s):

Silver Nanoparticles ◽

High Resolution ◽

Microcontact Printing ◽

Cost Effective ◽

Universal Method ◽

Pdms Stamp ◽

Silver Ink ◽

Effective Manner ◽

Etched Silicon ◽

Line Patterns

High resolution pattern of silver nanoparticles has received great attentions for its application in various electronic devices such as touch screen, OLED and solar cell. However, traditional printing techniques cannot meet the demands for high resolution. Here, we introduce a new method to prepare fine lines of nanoparticles less than 10 μm by microcontact printing (μCP), which was first used to surface modification and patterning. The PDMS stamp with 10 μm line width and space was prepared by replication of etched silicon template. Conductive silver ink was transferred from resource substrate to the target substrate using the PDMS stamp during μCP process. Transferred line patterns of silver nanoparticles were conductive and the resistance was about 100 Ω using two-point probe measure method after baking at 150°C for 30 min. We found that printing pressure imposed on the PDMS stamp was significant for the quality of lines during the μCP process and appropriate printing pressure was 7~9 KPa. The technology can be used as universal method to transfer other nanomaterials and create fine patterns with a simple and cost-effective manner.

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High speed vocal fold imaging using smartphone-based laryngoscope: A preliminary study

Conference on Lasers and Electro-Optics ◽

10.1364/cleo_at.2020.jtu2f.2 ◽

2020 ◽

Author(s):

YoungKyu Kim ◽

Jeongmin Oh ◽

Seung-ho Choi ◽

Ah Ra Jung ◽

Yoon Se Lee ◽

...

Keyword(s):

Vocal Fold ◽

High Speed ◽

Preliminary Study

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Deformation of Pyramidal PDMS Stamps During Microcontact Printing

Journal of Applied Mechanics ◽

10.1115/1.4033432 ◽

2016 ◽

Vol 83 (7) ◽

Cited By ~ 5

Author(s):

Congrui Jin ◽

Qichao Qiao

Keyword(s):

Soft Lithography ◽

Microcontact Printing ◽

Low Cost ◽

Transversely Isotropic ◽

Simulation Method ◽

Adhesive Contact ◽

Pdms Stamp ◽

Numerical Studies ◽

Assembled Monolayers ◽

Adhesive Interactions

Microcontact printing (MicroCP) is a form of soft lithography that uses the relief patterns on a master polydimethylsiloxane (PDMS) stamp to form patterns of self-assembled monolayers (SAMs) of ink on the surface of a substrate through conformal contact. Pyramidal PDMS stamps have received a lot of attention in the research community in recent years, due to the fact that the use of the pyramidal architecture has multiple advantages over traditional rectangular and cylindrical PDMS stamps. To better understand the dynamic MicroCP process involving pyramidal PDMS stamps, in this paper, numerical studies on frictionless adhesive contact between pyramidal PDMS stamps and transversely isotropic materials are presented. We use a numerical simulation method in which the adhesive interactions are represented by an interaction potential and the surface deformations are coupled by using half-space Green's functions discretized on the surface. It shows that for pyramidal PDMS stamps, the contact area increases significantly with increasing applied load, and thus, this technique is expected to provide a simple, efficient, and low-cost method to create variable two-dimensional arrays of dot chemical patterns for nanotechnology and biotechnology applications. The DMT-type and Johnson–Kendall–Roberts (JKR)-type-to-DMT-type transition regimes have been explored by conducting the simulations using smaller values of Tabor parameters.

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