Abstracts
Monday 10th September
Screen Printed Batteries for Intelligent Packaging Applications – TOMAS SYROVY, UNIVERSITY OF PARDUBICE
Within the presentation it will be described the fabrication of Screen Printed Batteries for Smart Labels applications.
It will be discussed influence of various battery parameters (layer thickness, printing paste) to battery performance.
The lateral and sandwich structure of batteries will be compared towards to its performance and towards to industrial fabrication process ability.
New applications opened by Genes’Ink Nano inks – GREGOIRE STAELENS, GENE´S INK, FRANCE.
The presentation will describe Genes Ink R&D Roadmap for screen printing inks.
Genes’ Ink team build its roadmap on a solid customer intimacy and knowledge developed by working with different type of users of printed electronics: OEMs, mesh manufacturers, institutes, universities and experts all around the world parts of a dedicated scientific committee.
You will see the strong links between Genes’ Ink and the printed electronic market through several development examples and collaborative works run at Genes’ Ink.
Micron Size features with Silver Molecular Inks’ by JULIE FERRIGNO, GGI Solutions, Canada and JOHN HANNAFIN, Global Product Manager, Sun Chemical, USA
GGI Solutions has been operating in the field of human machine interface technologies for more
than 30 years while continually diversifying its product and service offerings. The company is a
trusted value-added partner in leading-edge technological solutions for its global aerospace,
medical, industrial, transport and defense clients.
In collaboration with the National Research Council of Canada and Sun Chemical, GGI developeda silver Molecular Ink (M-Ink). The M-Ink formulation is based on silver salt, meaning there’s no particle. Consequently, the M-Ink allows to achieve the smallest resolution possible without
compromising the conductivity. With the current screen printing technology, 75μm/75μm
(width/space) is the best resolution achieved on standard substrate.
Sun Chemical and its parent company, the DIC Corporation, deliver a vast portfolio of advanced
products and technologies to broad markets, including automotive, inkjet, electrical/electronics,
architectural and industrial coatings, aerospace, printed electronics, ink, printed circuit boards,
textiles, photovoltaics, plastic cards, water degassing, metalworking and plastics.
The goal of the current study is to achieve 20μm/20μm (width/space) with the combination of
the new very fine line mesh developed by Asada Mesh, the M-Ink and a different set of substrates.
The results obtained will be compared to the traditional silver PTF fine line ink, AST-6025, from
Sun Chemical.
High Temperature Silver Paste for Fine Line Printing – MR HUNG-MING CHANG, HAYDALE TECHNOLOGIES, TAIWAN.
Haydale Technologies (Taiwan) has developed a novel silver paste for high-temperature sintering (>500C) for substrates such as ceramics.
This new ink is screen-printable and can achieve fine line printing down to 25u lines with 25u spacing, and it can be easily integrated into an environmentally friendly manufacturing process without the need for laser or chemical etching.
This results in no loss of material, and the cost of the ink is comparable to existing silver pastes on the market.
Screen Printing of Sensors/Actuators for Man/Machine Interface – GUNTER HUEBNER, THOMAS FISCHER M.Sc. and RICARDO MARTINEZ, HOCHSCHULE DER MEDIEN (HdM),STUTTGART, GERMANY
Very commonly sensors for man/machine interfaces are based on capacitive effects. When arranged in an x-y-matrix, those sensor arrays are called touchpads. Two main principles can be used to detect a touch: self-capacitance and the mutual capacitance. The principle of the mutual capacitance type is that the presence of a human finger (with the large capacity of the human body behind) changes the capacity of a sensor node locally. A microcontroller sequentially measures the capacity in the x-y-matrix, looking for changes in the base capacity due to the impact of the human finger (and body).
With the aid of a microcontroller that uses appropriate algorithms the x-y position of the capacity change can be detected and even multi-touch is measureable. Such touchpads are commonly manufactured on glass substrates by structuring ITO conductive layers. In this case, however, flexible plastic films (PET or similar) are used because the final aim of the project work is to print actors on the backside of the substrate that are able to generate a haptic feedback signal to the user (e.g. vibrations). On the touchpad-side of the film the layout and print quality must be optimized in order to reach comparable low capacities that enable quick detection and responses.
For the mutual capacitance principle, a crossing of the x and y lines is necessary. Therefore, at the crossing points a dielectric layer is printed in order to avoid shorts between the x and y lines, which mostly comprise of silver conductive inks. The geometry of the lines and especially the crossing points rules the performance of the sensors. In this investigation, several different designs for the layout between those crossing points have been tested and since only small idle capacities are necessary the lines may be very small, thus fine line printing (<<80µm) of the silver tracks is needed. The dependencies of the touchpad performance from design and print parameters (track width and height of conductive lines and dielectric) will be shown. A secondary goal is the printing of transparent touchpads. The finer the lines the better is the transparency due to the human eyes resolution limitations.
Since the project is currently being worked on intensively, more interesting results can be expected until the day of the presentation, especially on the actor side.
Tuesday 11th September
Plasma Functionalised GNP for volume printed flexible electronics – TIM CLAYPOLE, ANDREW CLAYPOLE, JAMES CLAYPOLE, SARAH-JANE POTTS, TIM MORTENSEN, WELSH CENTRE FOR PRINTING AND COATING
GNP (Graphene Nano Platelets) have the potential to create cost-effective electronic inks for a wide range of volume printed applications. However, in common with other nano carbons these are inherently inert making it difficult to bond and disperse. While some naturally occurring functional groups, such as oxygen, ethers, carboxyls or hydroxyls, are attached to the raw GNP, adding to or modifying these chemical groups, in a controlled fashion can exfoliate sheets, improve consistency and enable tailored interactions. It also enhances particle separation and improves dispersion, which are key factors for the manufacture of functional inks. This also enables the formulation of functional inks for applications such as printed electronics, sensors, energy storage, smart packaging and wearable technology.
Insight into the effect of the functionalisation was gained by formulating inks to study the rheology of the ink and printability. Model inks were created with GNPs with different functional groups. A combination of rheological measures, including constant shear, Small Amplitude Oscillatory Shear (SAOS) and Controlled Stress Parallel Superposition (CSPS), were used to establish the relationships between carbon loading, functionalisation and printability. These techniques also have potential applications for ink quality assurance and formulation.
Technological Advancements in Electronic Printing PU Squeegees – OWEN PRICE, WATTS POLYURETHANE PRODUCTS LTD., UK..
It is our aim to give an insight in to the latest technological advancements developed by Watts Urethane Products to improve and stay ahead with the continuous changes in contemporary electronic printing. We will demonstrate our capabilities as an experienced manufacture to develop and offer squeegee products to improve the efficiency of their printing to reduce costs, whilst improving print quality to maximize profits.
Several types of squeegees will be passed around to show the different specifications of material hardness, profiles and types.
A Proposal of Stainless Steel Wire Mesh for Improving Screen Emulsion Resolution – TORU MATSUMOTO, OIH Group – Kagoshima, Japan.
The Open Innovation Hub of Asada Mesh will present a possible new approach to resolve the present need to resolve feature openings down to 20-25 micron sizes.
A very big effort has gone into resolving Line Openings of 20-25 microns.
Mr. Matsumoto will share with the audience most typical issues that Screen Manufacturers encounter in their Emulsion Processing.
Black Mesh will be introduced as a possible alternative for resolving the ongoing issues.
20/20 Project; in the pursuit of 20 micron features and 20 micron spaces” Richard Stewart and Kirsty Denning from ASM Assembly Systems.
ASM in Weymouth, UK will present the results of a collaborative project with Asada Mesh to develop the optimum Screen Production and Testing Methodologies for Fine Line Screens.
The presentation will also include an overview of ASM´s Advanced Screens Production processes used to ensure that the High Mesh Count Technology from Asada Mesh can be used at the lowest possible total cost.
Updates on the latest Fine Mesh Panel Technology with some Industrial Size Partners already using the technology in Mass Production.
The project is focused on Fine Line Screens theoretically capable of printing 20µ track with 20µ gap.
Double Printing Ag Metallization Paste for Si-Solar Cell – Features and Current Status – YI ZHANG, HERAEUS, USA.
Updates on their Ag Pastes for Si-Solar Cell.
Latest updates on Screen Technology.
Latest updates on Printing modes.
Ultra-fine line printing trends.
Lower paste laydown.
High mesh screen with narrower opening.
Various wafer surface textures.
Double Printing Ag Metallization Paste Features.
Other update from cooperation projects.