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Featured researches published by C. Millot.


THE 14TH INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2011 | 2011

Investigation on Replication of Microstructures on Flexible Substrates by Roll Embossing Process

M. Sahli; J.C. Gelin; Thierry Barriere; C. Millot

The roll embossing is an efficient process to replicate micro‐patterns at continuous polymeric films. This process has been selected for its capabilities for manufacturing by rapid fabrication concepts high quality micro‐structures on polymeric thin films. The aim of this work is to develop experimental investigations and analyses of the proper embossing conditions (embossing velocity; material pressure and temperature) needed for the replication of micro‐structured parts with various geometries and sizes. In the present analysis, one propose a comparative that investigation considering filling rate, roughness and shape of embossed structures that have been realised and examined. The paper demonstrates that roll embossing shows proper replication facilities at the micro‐scale, to reproduce same geometrical dimensions and surface roughness than these corresponding to the cavities.


10TH ESAFORM CONFERENCE ON MATERIAL FORMING | 2007

Modelling and experimental determination of the replication of a cylindrical shape relief

M. Sahli; C. Millot; Claude Roques-Carmes; C. Khan Malek; J.C. Gelin

In that paper, one uses the concepts of contact mechanics to describe the quality of reproduction of cylindrical cavity shape by hot embossing. It results in a negative replica of the initial shape. This model takes into account the deformation of the polymer material imposed by the forming process. These results point out the influence of experimental parameters (temperature, pressure) as well as those of the elastic modulus (Young’s modulus and Poisson’s ratio). The analytical data are compared with the metrology results obtained using a scanning mechanical microscope in two or three‐dimensional mode. The set of data enables a predictive approach of the engraving quality depending on the polymer mechanical properties. The final goal is to adapt this model to the hot embossing process.


4M 2006 - Second International Conference on Multi-Material Micro Manufacture | 2006

On the use of hot embossing for the reproduction of the surface topography of mould microreliefs

M. Sahli; C. Millot; Claude Roques-Carmes; C. Khan Malek; J.C. Gelin

Abstract This article describes the quality of reproduction of microcavities structured into mould substrates which were filled by the imposed flow of amorphous polymeric materials. The rheology of the selected materials (cyclic olefin copolymer, COC) depends on the experimental parameters (temperature, pressure) used for the hot embossing process. To support the experimental data, the polymers were qualified by their melt flow index, flow index and consistency. The efficiency of the filling procedure into microcavities with smaller and smaller size is described using the potentialities of a customized Scanning Mechanical Microscope (SMM).


Journal of Materials Processing Technology | 2009

Quality assessment of polymer replication by hot embossing and micro-injection moulding processes using scanning mechanical microscopy

M. Sahli; C. Millot; Claude Roques-Carmes; C. Khan Malek; Thierry Barriere; J.C. Gelin


Journal of Materials Processing Technology | 2013

The manufacturing and replication of microfluidic mould inserts by the hot embossing process

M. Sahli; C. Millot; J.C. Gelin; Thierry Barriere


Microsystem Technologies-micro-and Nanosystems-information Storage and Processing Systems | 2009

Experimental analysis and numerical modelling of the forming process of polypropylene replicas of micro-cavities using hot embossing

M. Sahli; C. Millot; Claude Roques-Carmes; Chantal Khan Malek


25èmes Journées Internationales Francophones de Tribologie (JIFT 2013) | 2013

Caractérisation tribologique de films moléculaires d'acide phosphonique déposés sur une surface de cuivre

Mohamed Moustapha Moine; Xavier Roizard; Fabrice Lallemand; Luc Carpentier; Pierre-Henry Cornuault; Jean-Marie Melot; Jean-Yves Rauch; C. Millot


Microsystem Technologies-micro-and Nanosystems-information Storage and Processing Systems | 2012

Manufacturing and replication of glass pyramidal micro-structures by using the injection moulding process

M. Sahli; C. Millot; J.C. Gelin; Thierry Barriere


Proceedings of the 8th International Conference on Multi-Material Micro Manufacture | 2011

Manufacturing and Replication of Structured Metallic Mould Inserts by Injection Moulding Process

J. Zhang; M. Sahli; J.C. Gelin; C. Millot; C. Khan Malek


Congrès français de mécanique | 2011

analyse expérimentale de la réalisation de microcavités sur substrats polymères thermoplastiques par le procédé de roll embossing

M. Sahli; Jean-Claude Gelin; C. Millot; Thierry Barriere

Collaboration


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M. Sahli

Centre national de la recherche scientifique

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Claude Roques-Carmes

Centre national de la recherche scientifique

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J.C. Gelin

Centre national de la recherche scientifique

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Thierry Barriere

Centre national de la recherche scientifique

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Chantal Khan Malek

Centre national de la recherche scientifique

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Jean-Claude Gelin

University of Franche-Comté

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C. Khan Malek

Centre national de la recherche scientifique

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Luc Carpentier

Centre national de la recherche scientifique

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Guy Monteil

Centre national de la recherche scientifique

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Xavier Roizard

Centre national de la recherche scientifique

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