scholarly journals Pad-Printing as a Fabrication Process for Flexible and Compact Multilayer Circuits

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6802
Author(s):  
Ahmad Jaafar ◽  
Spyridon Schoinas ◽  
Philippe Passeraub
Keyword(s):  
Printed Electronics ◽  
Low Cost ◽  
Maturity Level ◽  
Touch Sensor ◽  
Printing Quality ◽  
Printing Technique ◽  
Beneficial Impact ◽  
Printing Processes ◽  
Print Size

The purpose of this paper is to present a newly developed process for the fabrication of multilayer circuits based on the pad-printing technique. Even though the maturity level, in terms of accuracy, substrate type and print size of several printing industrial processes is relatively high, the fabrication complexity of multilayer printed electronics remains relatively high. Due to its versatility, the pad-printing technique allows the superposition of printed conductive and insulating layers. Compared to other printing processes, its main advantage is the ability to print on various substrates even on flexible, curved or irregular surfaces. Silver-based inks were used for the formulation of conductive layers while UV inks were employed to fulfil the functionality of the insulating layers. To demonstrate the functionality of the pad-printing results, a multilayer test pattern has been designed and printed on Kapton®. Furthermore, to demonstrate the efficacy of this approach, a multilayer circuit composed of three stacked layers has been designed and printed on various substrates including Kapton®, paper and wood. This electronic circuit controls an array of LEDs through the manipulation of a two-key capacitive touch sensor. This study, allowed us to define recommendations for the different parameters leading to high printing quality. We expect a long-term beneficial impact of this study towards a low-cost, fast, and environmental-friendly production of printed electronics.

An Investigation onto Polydimethylsiloxane (PDMS) Printing Plate of Multiple Functional Solid Line by Flexographic

2013 ◽  
Vol 844 ◽  
pp. 158-161 ◽  
Author(s):  
M.I. Maksud ◽  
Mohd Sallehuddin Yusof ◽  
M. Mahadi Abdul Jamil
Keyword(s):  
Laser Ablation ◽  
Line Width ◽  
High Speed ◽  
Printed Electronics ◽  
Low Cost ◽  
Flexible Substrates ◽  
Large Area ◽  
Printing Plate ◽  
Roll To Roll ◽  
Printing Processes

Recently low cost production is vital to produce printed electronics by roll to roll manufacturing printing process like a flexographic. Flexographic has a high speed technique which commonly used for printing onto large area flexible substrates. However, the minimum feature sizes achieved with roll to roll printing processes, such as flexographic is in the range of fifty microns. The main contribution of this limitation is photopolymer flexographic plate unable to be produced finer micron range due to film that made by Laser Ablation Mask (LAMs) technology not sufficiently robust and consequently at micron ranges line will not be formed on the printing plate. Hence, polydimethylsiloxane (PDMS) is used instead of photopolymer. Printing trial had been conducted and multiple solid lines successfully printed for below fifty microns line width with no interference between two adjacent lines of the printed images.

Electrical Functionalization of Interconnect Devices by Digital Printing - Evaluation of Properties and Long-Term Behaviour

2018 ◽  
Vol 882 ◽  
pp. 190-198
Author(s):  
Julian Schirmer ◽  
Jewgeni Roudenko ◽  
Marcus Reichenberger
Keyword(s):  
Environmental Sustainability ◽  
Electrical Resistance ◽  
Printed Electronics ◽  
Low Cost ◽  
Digital Printing ◽  
Electronic Components ◽  
Low Viscosity ◽  
Mechanical And Electrical Properties ◽  
Long Term Behavior

Digital printing technologies are becoming increasingly important for modern electronics production. Besides inkjet printing for low viscosity inks, jetting of pasty materials such as PTF can be a viable alternative to traditional subtractive or additive metallization methods in the future. Hybrid printed electronics, a combination of printed circuitry with classical electronic components, offers many advantages such as low cost, environmental sustainability and others. Until now, the mechanical and electrical properties of printed pastes on molded substrates have not been investigated in detail, just as little as the long-term characteristics of interconnection technologies necessary to mount traditional electronic components onto printed substrates. In different test series, electrical resistance and adhesion of a special PTF material have been investigated. The long-term behavior of the material itself and three alternative interconnection technologies for mounting of SMT components has been evaluated. Results are encouraging, although still a lot of improvements are necessary.

scholarly journals Influence of Structure and Composition of Woven Fabrics on the Conductivity of Flexography Printed Electronics

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3165
Author(s):  
Ana María Rodes-Carbonell ◽  
Josué Ferri ◽  
Eduardo Garcia-Breijo ◽  
Ignacio Montava ◽  
Eva Bou-Belda
Keyword(s):  
Moisture Absorption ◽  
Printed Electronics ◽  
Low Cost ◽  
Absorption Capacity ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Color Measurement ◽  
Continuous Manufacturing ◽  
Electronic Textiles ◽  
Printing Technique

The work is framed within Printed Electronics, an emerging technology for the manufacture of electronic products. Among the different printing methods, the roll-to-roll flexography technique is used because it allows continuous manufacturing and high productivity at low cost. Nevertheless, the incorporation of the flexography printing technique in the textile field is still very recent due to technical barriers such as the porosity of the surface, the durability and the ability to withstand washing. By using the flexography printing technique and conductive inks, different printings were performed onto woven fabrics. Specifically, the study is focused on investigating the influence of the structure of the woven fabric with different weave construction, interlacing coefficient, yarn number and fabric density on the conductivity of the printing. In the same way, the influence of the weft composition was studied by a comparison of different materials (cotton, polyester, and wool). Optical, SEM, color fastness to wash, color measurement using reflection spectrophotometer and multi-meter analyses concluded that woven fabrics have a lower conductivity due to the ink expansion through the inner part of the textile. Regarding weft composition, cotton performs worse due to the moisture absorption capacity of cellulosic fiber. A solution for improving conductivity on printed electronic textiles would be pre-treatment of the surface substrates by applying different chemical compounds that increase the adhesion of the ink, avoiding its absorption.

Direct Patterning by Inkjet Printing 3-Mercaptopropionic Capped Nano Silver Suspension

2011 ◽  
Vol 409 ◽  
pp. 508-513
Author(s):  
Yu Feng Liu ◽  
Weng Sing Hwang ◽  
Yen Fang Pai ◽  
Ming Hsu Tsai
Keyword(s):  
Inkjet Printing ◽  
Printed Electronics ◽  
Low Cost ◽  
Specific Area ◽  
Direct Patterning ◽  
Printing Technique ◽  
Fast Processing ◽  
One Step ◽  
Circuit Components ◽  
Printed Patterns

All-printed electronics as a mean of fast processing and achieving ultra-low-cost electronic devices has attracted great interest in recent years. Inkjet printing has excelled as the most promising technique by which the circuit components can be directly drawn on the specific area in one step. Furthermore, the low temperature reduction processes can be achieved by exploit the low-melting point characteristic of nanometallic particles. The inkjet printing technique to deposit silver nanoparticles (3.39±1.21 nm) capped by saturated 3-Mercaptopropionic acid onto silicon substrate was studied. The silver patterns were tested for its functionality as circuit components like conductor, resistor and capacitor. All components can be produced simply by thermal annealing of an inkjet printed patterns under an atmosphere of 90% N2-10% H2 at 300°C for 1 hr.

A paper-based touch sensor with an embedded micro-probe array fabricated by double-sided laser printing

Nanoscale ◽  
2017 ◽  
Vol 9 (27) ◽  
pp. 9598-9605 ◽  
Author(s):  
Gui-Wen Huang ◽  
Na Li ◽  
Hong-Mei Xiao ◽  
Qing-Ping Feng ◽  
Shao-Yun Fu
Keyword(s):  
Low Cost ◽  
Laser Printing ◽  
Highly Efficient ◽  
Touch Sensor ◽  
Printing Technique ◽  
Probe Array

Herein, we demonstrated a low-cost and flexible paper-based touch sensor, which was fabricated via an original highly efficient double-sided laser printing technique.

Fine Particle Mass Monitoring with Low-Cost Sensors: Corrections and Long-Term Performance Evaluation

2019 ◽  
Author(s):  
Carl Malings ◽  
Rebecca Tanzer ◽  
Aliaksei Hauryliuk ◽  
Provat K. Saha ◽  
Allen L. Robinson ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Fine Particle ◽  
Low Cost ◽  
Particle Mass ◽  
Long Term Performance ◽  
Term Performance

scholarly journals Wittichenite semiconductor of Cu3BiS3 films for efficient hydrogen evolution from solar driven photoelectrochemical water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dingwang Huang ◽  
Lintao Li ◽  
Kang Wang ◽  
Yan Li ◽  
Kuang Feng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Low Cost ◽  
Solar Hydrogen ◽  
Onset Potential ◽  
Term Stability ◽  
Long Term Stability ◽  
Solar Water Splitting ◽  
Current Densities

AbstractA highly efficient, low-cost and environmentally friendly photocathode with long-term stability is the goal of practical solar hydrogen evolution applications. Here, we found that the Cu3BiS3 film-based photocathode meets the abovementioned requirements. The Cu3BiS3-based photocathode presents a remarkable onset potential over 0.9 VRHE with excellent photoelectrochemical current densities (~7 mA/cm2 under 0 VRHE) and appreciable 10-hour long-term stability in neutral water solutions. This high onset potential of the Cu3BiS3-based photocathode directly results in a good unbiased operating photocurrent of ~1.6 mA/cm2 assisted by the BiVO4 photoanode. A tandem device of Cu3BiS3-BiVO4 with an unbiased solar-to-hydrogen conversion efficiency of 2.04% is presented. This tandem device also presents high stability over 20 hours. Ultimately, a 5 × 5 cm2 large Cu3BiS3-BiVO4 tandem device module is fabricated for standalone overall solar water splitting with a long-term stability of 60 hours.

scholarly journals Development of a posterior sagittal anorectal surgical teaching model

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
J. A. van Ling ◽  
G. M. J. Bökkerink ◽  
I. de Blaauw ◽  
S. M. B. I. Botden
Keyword(s):  
Low Cost ◽  
Target Group ◽  
Teaching Model ◽  
Perineal Body ◽  
Perineal Fistula ◽  
Training Tool ◽  
Surgical Teaching ◽  
Long Term Prognosis ◽  
Structured Approach

Abstract Background An Anorectal Malformation (ARM) is a rare congenital malformation, which requires proper correction to ensure the best long-term prognosis. These procedures are relatively infrequent and complex, in which a structured approach is important. Therefore, training on an affordable model could be beneficial. Methods A low-cost ARM model was developed. The base was reusable and the perineal body disposable. Both expert pediatric surgeons (Experts) and residents/fellows (Target group) were recruited for this study. After testing the model, they completed a questionnaire regarding the realism and didactic value of the model, using a 5-point Likert scale. Results Forty-four participants were recruited (Target group n = 20, Experts n = 24). The model has high mean scores of 3.8–4.4 for the total group and even higher on several aspects by the Target group. The experts regarded the haptics and manipulation of the fistula less realistic than the Target group (3.7 versus 4.3, p = 0.021 and 4.2 versus 4.6, p = 0.047). It was considered to be a very good training tool (mean 4.3), without significant differences between the groups. Conclusions These results show general consensus that this model is a potent training tool for the component steps of the repair of an ARM with recto-perineal fistula by sagittal approach.

scholarly journals Organ-specific, multimodal, wireless optoelectronics for high-throughput phenotyping of peripheral neural pathways

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Woo Seok Kim ◽  
Sungcheol Hong ◽  
Milenka Gamero ◽  
Vivekanand Jeevakumar ◽  
Clay M. Smithhart ◽  
...  
Keyword(s):  
High Throughput ◽  
Low Cost ◽  
Optoelectronic Device ◽  
Antenna System ◽  
Neural Pathways ◽  
Organ Specific ◽  
Coil Antenna ◽  
Sensory Fibers

AbstractThe vagus nerve supports diverse autonomic functions and behaviors important for health and survival. To understand how specific components of the vagus contribute to behaviors and long-term physiological effects, it is critical to modulate their activity with anatomical specificity in awake, freely behaving conditions using reliable methods. Here, we introduce an organ-specific scalable, multimodal, wireless optoelectronic device for precise and chronic optogenetic manipulations in vivo. When combined with an advanced, coil-antenna system and a multiplexing strategy for powering 8 individual homecages using a single RF transmitter, the proposed wireless telemetry enables low cost, high-throughput, and precise functional mapping of peripheral neural circuits, including long-term behavioral and physiological measurements. Deployment of these technologies reveals an unexpected role for stomach, non-stretch vagal sensory fibers in suppressing appetite and demonstrates the durability of the miniature wireless device inside harsh gastric conditions.

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