Improvement of Performance of Electroluminescent Panel by Reducing the Thickness of Dielectric Layer

Alternating-current powder-based electroluminescence is currently the only technique for quick and easy preparation of large area, low cost electroluminescent panels by the means of material printing. Manufacturing of the panels is currently done exclusively by screen printing which is associated with deposition of much thicker layers than typical for other methods of material printing. Typical thickness of layers is in the order of tens of microns and more. The overall thickness of films forming the panel is however a serious shortcoming of the devices because the driving voltage for generation of light needs to be high and the thickness of layers render the panel non transparent from the side of the dielectric layer. One layer of dielectric films screen printed from the commercially available formulation is approximately 10 μm thick and cannot be effectively reduced anymore and thus another printing technique needs to be exploited. The goal of this work is to define and optimize a composition of a novel ink jet printing formulation of dielectric film and verification of parameters of the final layers for use in this type of technology. The major benefits of ink jet printed dielectric layer are the possible preparation of a panel emitting light from both sides with reduced driving voltage needed for its operation.

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Performance test and quality control of large area reference sources fabricated by the ink-jet printing technique

Applied Radiation and Isotopes ◽

10.1016/j.apradiso.2012.02.024 ◽

2012 ◽

Vol 70 (9) ◽

pp. 1964-1968 ◽

Cited By ~ 4

Author(s):

Takahiro Yamada ◽

Mikio Matsumoto ◽

Shinichi Yamamoto ◽

Yasushi Sato ◽

Akira Yunoki ◽

...

Keyword(s):

Quality Control ◽

Performance Test ◽

Large Area ◽

Ink Jet Printing ◽

Ink Jet ◽

Printing Technique ◽

Jet Printing

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Properties of Different Types of Protective Layers on Silver Metallic Nanoparticles for Ink-Jet Printing Technique

Graphene, Carbon Nanotubes, and Nanostructures ◽

10.1201/b13905-13 ◽

2017 ◽

pp. 303-320

Author(s):

Andrzej Mościcki ◽

Anita Smolarek ◽

Jan Felba ◽

Tomasz Fałat

Keyword(s):

Metallic Nanoparticles ◽

Ink Jet Printing ◽

Protective Layers ◽

Ink Jet ◽

Printing Technique ◽

Different Types ◽

Jet Printing

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Improving Performance of Laser-Printed Conductive Silver Lines

Additional Conferences (Device Packaging HiTEC HiTEN & CICMT) ◽

10.4071/cicmt-2012-wa46 ◽

2012 ◽

Vol 2012 (CICMT) ◽

pp. 000377-000384

Author(s):

Dustin Büttner ◽

Klaus Krüger

Keyword(s):

Thick Film ◽

Screen Printing ◽

Printed Electronics ◽

Production Method ◽

Silver Particles ◽

Ceramic Substrates ◽

High Speeds ◽

Conductive Line ◽

Ink Jet ◽

Jet Printing

Within the last decade, large efforts were made to implement digital printing as a production method for printed electronics. Especially in production of thick-film electronics, innovation is pushed forward to overcome the lacks of established screen-printing regarding flexibility and tooling. Besides the numerous approaches in using ink-jet printing for printed electronics, researchers at Helmut Schmidt University already showed huge progress in applying electrophotography (“laser printing”) as a method to print conductive silver lines in order to form a conductive layout for thick-film circuits. Electrophotography is a solvent-free method, able to directly print silver toner onto ceramic substrates, forming a conductive line after firing. Benefits are high speeds and flexibility and a huge potential regarding precision. Now, after the feasibility of the method was proven and even functional conductive layouts like RFID coils were printed, the next steps have to be taken towards developing electrophotography to an applicable method in a thick-film production process. Thus, this paper describes the efforts in improving the method's performance. Different kinds of silver particles are tested towards their possibility of forming a silver toner. The resulting silver lines are examined regarding conductivity and printing precision. Also, surface treatment of substrates is considered as a method to reduce the number of required print cycles. Corresponding tests are performed. Furthermore, different firing profiles are tested towards their influence onto the resulting silver lines. Combining the results of these examinations, the performance of conductive silver lines could be improved significantly.

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Novel Flexible NH3 Gas Sensor Prepared by Ink-Jet Printing Technique

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.506.39 ◽

2012 ◽

Vol 506 ◽

pp. 39-42 ◽

Cited By ~ 9

Author(s):

C. Wongchoosuk ◽

P. Jangtawee ◽

P. Lokavee ◽

S. Udomrat ◽

P. Sudkeaw ◽

...

Keyword(s):

Gas Sensor ◽

Low Cost ◽

Metal Electrode ◽

Ink Jet Printing ◽

Force Microscopy ◽

Sensing Mechanism ◽

Atomic Force ◽

Ink Jet ◽

Polymer Metal ◽

Jet Printing

We have fabricated a low-cost and flexible NH3 gas sensor using thermal ink-jet printing. The poly (3,4-ethylene dioxythiophene) doped with polystyrene sulfonated acid (PEDOT/PSS) with thickness of ~ 2 μm was used as a sensing film. The interdigitated electrode using patterned aluminum plate was attached over the sensing film. Atomic force microscopy results show the high homogeneous film and only small roughness is presented on the sensing film. This sensor exhibits high selectivity and sensitivity to NH3 at room temperature. The sensor response works linearly with gas concentrations between 100-1000 ppm. The modulation of conducting polymer/metal electrode interface plays a role in the sensing mechanism of NH3. Changes in the position of interdigitated electrodes can change the dominant sensing mechanism of typical polymer gas sensor.

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An Investigation into Printing Processes and Feasibility Study for RFID Tag Antennas

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.315.468 ◽

2013 ◽

Vol 315 ◽

pp. 468-471 ◽

Cited By ~ 6

Author(s):

M.I. Maksud ◽

Mohd Sallehuddin Yusof ◽

M. Mahadi Abdul Jamil

Keyword(s):

Feasibility Study ◽

Screen Printing ◽

Rfid Tag ◽

Ink Jet ◽

Jet Printing ◽

Current Sample ◽

Printing Processes ◽

Rfid Antennas ◽

A Current ◽

Read Range

This paper will explain a study of several printing process (screen printing, flexography, gravure and ink jet printing) for RFID antennas transponder. The potential of each process will also be investigated. A current sample of RFID is selected, and the antenna processes have been identified, and the comparison of antenna read range will be exhibited.

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Electrostatic screen-through ink jet printing technique

10.1117/12.46343 ◽

1991 ◽

Author(s):

Akira Nakazawa ◽

Michinori Kutami ◽

Mitsuo Ozaki ◽

Shigeharu Suzuki ◽

Hideyuki Kikuchi

Keyword(s):

Ink Jet Printing ◽

Ink Jet ◽

Printing Technique ◽

Jet Printing

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Low-cost display assembly and interconnect using ink-jet printing technology

Journal of the Society for Information Display ◽

10.1889/1.1844664 ◽

2001 ◽

Vol 9 (1) ◽

pp. 9 ◽

Cited By ~ 12

Author(s):

Donald J. Hayes ◽

W. Royall Cox ◽

Michael E. Grove

Keyword(s):

Low Cost ◽

Printing Technology ◽

Ink Jet Printing ◽

Ink Jet ◽

Jet Printing

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Ink-jet printing of ferroelectric poly(vinylidene fluoride-trifluoroethylene) copolymers

MRS Proceedings ◽

10.1557/proc-0889-w05-02 ◽

2005 ◽

Vol 889 ◽

Cited By ~ 4

Author(s):

Shihai Zhang ◽

Ziqi Liang ◽

Qing Wang ◽

Q.M. Zhang

Keyword(s):

Vinylidene Fluoride ◽

Low Cost ◽

Gold Surface ◽

Bulk Sample ◽

Boiling Temperature ◽

Active Components ◽

Ink Jet Printing ◽

Ink Jet ◽

Poly Vinylidene Fluoride ◽

Jet Printing

AbstractPoly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymers are well known for their excellent ferroelectric and other related properties and they are being exploited as active components in many microdevices such as ferroelectric memory cells and infrared sensors. Compared with conventional photolithography, ink-jet printing provides a low-cost versatile method to fabricate polymer micro-devices. In this paper, the influences of driving waveform at the jet head, ink concentration, substrate chemistry, and the solvent quality on the printed P(VDF-TrFE) dots were investigated. It was found that well-defined P(VDF-TrFE) micro-dots with diameter of less than 30 mm and thickness of ∼1 μm can be printed by using a mixed solvent system, consisting of a good solvent with relatively low boiling temperature and a poor solvent with high boiling temperature, on perfluorinated hydrophobic gold surface. The printed P(VDF-TrFE) micro-dots possess crystallinity comparable to that of the bulk sample, suggesting that ink-jet printing technology is a promising micro-fabrication technology for manufacturing P(VDF-TrFE)-based micro-sensors and other micro-devices.

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Recent Developments in Light-Emitting Polymers

MRS Bulletin ◽

10.1557/mrs2002.144 ◽

2002 ◽

Vol 27 (6) ◽

pp. 451-455 ◽

Cited By ~ 37

Author(s):

Ian D. Rees ◽

Kay L. Robinson ◽

Andrew B. Holmes ◽

Carl R. Towns ◽

Richard O'Dell

Keyword(s):

Mobile Applications ◽

First Generation ◽

Low Cost ◽

Major Focus ◽

Light Emitting ◽

Direct Patterning ◽

Ink Jet ◽

Recent Developments ◽

Jet Printing ◽

New Generation

AbstractConjugated light-emitting polymers (LEPs) have real potential to serve as the active layer in a new generation of emissive displays. Emerging as lead candidates for first-generation displays are poly(1,4-phenylene vinylene)s (PPVs) and poly(9,9-dialkylfluorene)s, as well as other polyaromatic materials. The poly(fluorene)s are at present the most commercially developed of these LEP materials for red–green–blue (RGB) applications. The low power consumption of LEP devices in general makes them particularly suited to mobile applications. Combining solution-processable emissive polymers with direct-patterning methods such as ink-jet printing will lead to the possibility of low-cost, high-resolution displays. The synthesis and properties of PPVs and poly(9,9-dialkylfluorene)s are briefly reviewed in this article, with a major focus on recent developments.

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