Optimised with treatment for smart devices

SCHEME: CORE

CALL: 2008

DOMAIN: MS - New Functional and Intelligent Materials and Surfaces

FIRST NAME: Tom

LAST NAME: Wirtz

INDUSTRY PARTNERSHIP / PPP: No

INDUSTRY / PPP PARTNER:

HOST INSTITUTION: LIST

KEYWORDS: Plasma

START: 2009-04-01

END: 2012-03-31

WEBSITE: https://www.list.lu/

Submitted Abstract

An increasing interest in wires and fibres with special surface treatments is currently observed. Such¡§intelligent¡¨ or ¡§smart¡¨ wires and fibres have applications in various high-tech fields (manufacturing ofenergy generating fabrics, wires with piezo-electric effects, wires for sensor applications, wires withintegrated anti-corrosion protection, wear resistant wires for cutting applications, ¡K).A method of choice to confer such intelligent properties to wires and fibres consists in performing an ionimplantation combined with a deposition process on their surface. The implantation process allows forunique modifications of surface or coating properties:„X Improvement of adhesion of the deposited species by ion mixing„X Reduction of the stress in thick layers leading to better adhesion„X Elaboration of new microstructure when associated with coating deposition„X Better control of physical surface properties: conductivity, magnetic properties„X Elaboration of new surface topography at the nano- or microscale by coupling plasma etchingand ion bombardment„X Possibility of decoupling or combining mechanical and chemical effects of the ion bombardmentby using inert or reactive gases„X Possibility to control the depth of penetration and the implanted dose precisely (interesting inparticular for semiconductor applications)„X Use of a low quantity of chemical products for important modifications of surface properties. Theprocess is thus very efficient and has a low environmental impactThis project aims at setting-up a plasma immersion ion implantation (PIII) process dedicated to thetreatment of wires and fibres. The major difficulty and the originality of this project will consist inconcentrating a high-density plasma in a small volume having a cylindrical shape and a sufficient length.In a first stage, extensive plasma modelling and calculations will be performed in order to determine theoptimum properties (geometry, density, ¡K) of the plasma. The objectives of this new plasmaconfiguration will include high deposition rates and thus high treatment speeds. Special attention will bepaid to achieve a perfectly cylindrical plasma geometry in order to guarantee an homogeneous treatmentall over the wire surface. The Leibniz-Institut fur Oberflachenmodifizierung (Leipzig/D) will activelycontribute to the modelling and calculation.In a second stage, a prototype instrument based on the previously determined plasma configuration willbe designed. This UHV instrument will include a differential pumping system based on capillariesallowing the continuous circulating of wires from coils situated at the air-side, ion sources, a plasmaconfining set-up, plasma diagnostic tools and dedicated supplying and operating electronics.Once the prototype instrument has been fully assembled, it will be completely tested and characterised.The performances will be compared to the theoretical performances predicted by the models andcalculations.An application focussed on piezoelectric fibres and wires will be run during the whole project in order tohighlight the progress made on an instrumental and process level on a typical application.In a final stage, well-chosen applications will be run on the prototype in order to demonstrate the conceptand reliability of the new instrument.This project will be multi-disciplinary and will involve plasma calculations and modelling, chargedparticle optics, surface treatment, mechanical and electronic engineering and UHV design.

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