Experience

Meta
• French Polynesia
• Law Practice
• 1 - 100 Employee
• Material engineer

  • Apr 2022 - Present


Luxexcel NV

• Material engineer

  • Jun 2017 - Present

  3D printing of ophthalmic grade lenses is one of the challenging tasks. After few years of research and development a platform is developed that enables to 3D print ophthalmic lenses. I am a part of Materials team in R&D department of Luxexcel - Characterizing the UV curable acrylate ink - Formulation of new UV curable acrylate inks - Investigating different properties of the ink such as (surface tension, density, viscosity, refractive index and jetting properties) - Designing the waveform for various test inks on drop watcher - Optimizing the layer by layer 3D printing process to print ophthalmic lenses - Designing the test plan for printing and investigating the cross linking behavior - Fine tuning the formulation based on the results from test prints - Process optimization of the test inks before hand over to the quality department - Coordinating with software team for software changes and testing the concept versions - Investigating the RCA for the process shortcomings - Processing the data using excel, origin and R/phyton - Good understanding of thin film liquid layer formation Show less



Holst Centre

• Netherlands
• Research Services
• 1 - 100 Employee

• Internship Trainee

  • May 2016 - Jun 2017

  "Electro-mechanical behavior of stretchable electronic structures" The main aim of the thesis : 1. Substrate study (Thickness dependent electromechanical behviour of TPU) 2. Ink study (Selection of the ink based on the change in the conductivity w.r.t stretching test) 3. Optimize the printing quality ( Printing single and multiple layer of the conductive tracks and comparing the change in the electromechanical behaviour of the single and multi layer tracks printed) The goal was to replace the standard substrate with new substrate/ink combination which have minimum change in electromechanical behaviour at higher tensile stress. Each TPU substrate had varying thickness range from 80, 100, 150 and 200 µm. These substrates were cut in A4 size and printed with dedicated straight line pattern with well defined screen printing process. Outline of the testing process 1. Samples are placed beneath the optical microscope to investigate if printing/spreading was enough 2. Tensile testing of the samples with different test regimes (i) Progressive loading (The strain on the sample is increased with every cycle, Its a 6 step strain cycle) (ii) Uniform loading until failure (The strain is applied on the samples continuously until there is loss of conductivity due to the cracking in the conductive track) (iii) Cyclic loading (Strain is applied continuously with maximum 20 % and minimum 7 % for 100 cycles) (iv) Evaluate the cracking behaviour of the conductive track The above testing regime was repeated on two different inks. Multilayer printing : 1. Multi layer printing was performed to avoid the mesh pattern, which were visible at higher tensile strain 2. Cracking density reduced with multi layer printing Conclusion: Multilayer printing shows least change in electromechanical behaviour at higher strain levels and is independent of substrate or ink. Show less



TU Chemnitz

• Germany
• Events Services

• Student Assistant

  • Jan 2016 - May 2016

  Determining the change in surface potential in and around the vias using KPFM. Investigating and analyzing the change in surface potential of the MEMS sensor with and without applying stress. SEM analysis of special AFM gold tips.EDX analysis of 1s gold sputtered on HOPG substrate.

• Research Assistant

  • Sep 2015 - Apr 2016

  Aim: Photoresponse for single and few layer gallium selenide 1. Mechanical exfoliation of the GaSe flakes and depositing on HOPG substrate2. Identifying the flakes and area of interest using optical microscope3. Evaluating the thickness of the flakes using AFM4. Conductivity change was determined by Cs-AFM (Specially designed gold AFM tip was used)5. The change in photo response was investigated by exciting the flakes using solid state laser(Green/Red) in combination with Cs-AFM setup6. Layer dependent change in photo response was observed Show less