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João Rui Martins Freitas completed his master's degree in Industrial Electronics and Computers Engineering, specializing in Microtechnologies and Power Electronics, in 2019 at University of Minho, and his Ph.D. degree, in 2025, in Electronics and Computer Engineering, in the field of Instrumentation and Electronic Microsystems, also at University of Minho. He has been a PLFO R&D Process Engineer at Amkor Technology Portugal (ATEP) since March of 2025.
Identification

Personal identification

Full name
João Rui Martins Freitas

Citation names

  • Freitas, J. R.

Author identifiers

Ciência ID
991E-674E-2605
ORCID iD
0000-0002-5179-3368
Scopus Author Id
57218856260

Knowledge fields

  • Engineering and Technology - Electrotechnical Engineering, Electronics and Informatics - Electrical and Electronic Engineering

Languages

Language Speaking Reading Writing Listening Peer-review
Portuguese (Mother tongue)
English Upper intermediate (B2) Advanced (C1) Upper intermediate (B2) Upper intermediate (B2)
Education
Degree Classification
2020/09/01 - 2025/01/29
Concluded
 Engenharia Eletrónica e de Computadores (Doutoramento)
Universidade do Minho, Portugal
"Ultra-thin and flexible probe for neuronal activity recording" (THESIS/DISSERTATION)
 Bom com Distinção
2019/12/05
Concluded
 Engenharia Eletrónica Industrial e Computadores (Mestrado integrado)
Major in Micro Technologies and Power Electronics
Universidade do Minho - Campus de Azurém, Portugal
"Microlenses Fabrication for MicroLEDs" (THESIS/DISSERTATION)
 14 valores
2018/06
Concluded
 19th Edition of IdeaLab (Outros)
TecMinho Associação Universidade-Empresa para o Desenvolvimento, Portugal
Affiliation

Science

Category
Host institution 		Employer
2020/01/01 - 2024/12/31 Researcher (Research) Universidade do Minho Centro de Sistemas Microeletromecânicos, Portugal
2019/09/01 - 2019/12/31 Researcher (Research) Universidade do Minho Centro de Sistemas Microeletromecânicos, Portugal

Others

Category
Host institution 		Employer
2025/03/01 - Current R&D Process Engineer Amkor Technology Portugal SA, Portugal
Projects

Grant

Designation Funders
2021/01/01 - 2024/12/31 Reduced-size neural probe based on atomic layer deposition for neural recordings and optogenetic studies
2020.07708.BD
10.54499/2020.07708.BD
Universidade do Minho, Portugal
 Fundação para a Ciência e a Tecnologia
Ongoing

Contract

Designation Funders
2020/01/01 - 2020/12/31 Thin-films based Fabry-Perot optical filters and PDMS coating µ-lenses for optical neural probes
PTDC/CTM-REF/28406/2017
Research Fellow
Universidade do Minho Centro de Sistemas Microeletromecânicos, Portugal
 Associação para a Inovação e Desenvolvimento da FCT
Concluded
2019/09/01 - 2019/12/31 CMEMS Strategic Project
UID/EEA/04436/2019
Research Fellow
Universidade do Minho Centro de Sistemas Microeletromecânicos, Portugal
 Associação para a Inovação e Desenvolvimento da FCT
Concluded
Outputs

Publications

Conference poster
  1. M. Cunha, Florival; Freitas, J. R.; S. Pimenta; Silva, Manuel; Correia, José. "PDMS microlenses coating with a SiO2 ultra-thin film deposited by atomic layer deposition". Paper presented in RAFALD 2024, 2024.
  2. Freitas, J. R.; Pimenta, Sara; Correia, José H.. Corresponding author: Freitas, J. R.. "Sonda ultra-fina e flexível para aquisição de atividade neuronal". Paper presented in Ciência 2024, 2024.
  3. Rodrigues, V. H; Freitas, J. R.; Silva, M. F.; Correia, José. Corresponding author: Rodrigues, V. H. "MEMS-based waveguide SiO2 fabricated by RIE process for optical sensing". Paper presented in IBERSENSOR 2022, 2022.
  4. Freitas, J. R.; R. B. Freitas; Esteves, Bruno; D. J. Santos; M. J. Maciel; Pimenta, S.; Correia, José. Corresponding author: Pimenta, S.. "Flexible and reduced-size neural probe using a photosensitive polyimide". Paper presented in BioIberoamerica 2022, 2022.
Journal article
  1. Freitas, João R.; Rodrigues, José A.; Machado, João L.; Aguiar, Leandro A. A.; Rodrigues, Ana J.; Oliveira, João F.; Correia, José H.; Pimenta, Sara. "Fabrication, Electrochemical Characterization, and In Vivo Validation of a Flexible Neural Probe". Journal of Microelectromechanical Systems 34 4 (2025): 482-487. https://doi.org/10.1109/jmems.2025.3579544.
    10.1109/jmems.2025.3579544
  2. Cunha, Florival M.; Freitas, J. R.; Pimenta, Sara; Silva, Manuel F.; Correia, José H.. "Silicon dioxide atomic layer deposition at low temperature for PDMS microlenses coating". Optical Materials 157 (2024): 116167. http://dx.doi.org/10.1016/j.optmat.2024.116167.
    10.1016/j.optmat.2024.116167
  3. Freitas, J. R.; Pimenta, Sara; Rodrigues, Vítor H.; Silva, Manuel F.; Correia, José H.. Corresponding author: Freitas, J. R.. "Silicon nitride thin-films deposited by radiofrequency reactive sputtering: Refractive index optimization with substrate cooling in a nitrogen-rich atmosphere". Optical Materials 149 (2024): 115130. http://dx.doi.org/10.1016/j.optmat.2024.115130.
    10.1016/j.optmat.2024.115130
  4. Pimenta, Sara; Freitas, J. R.; Correia, José H.. Corresponding author: Pimenta, Sara. "Flexible neural probes: a review of the current advantages, drawbacks, and future demands". Journal of Zhejiang University-SCIENCE B 25 2 (2024): 153-167. http://dx.doi.org/10.1631/jzus.b2300337.
    Published • 10.1631/jzus.b2300337
  5. Freitas, J. R.; Pimenta, S.; D. J. Santos; Esteves, Bruno; Gomes, Nuno M.; Correia, José. "Flexible Neural Probe Fabrication Enhanced with a Low-Temperature Cured Polyimide and Platinum Electrodeposition". Sensors 22 24 (2022): 9674. http://dx.doi.org/10.3390/s22249674.
    10.3390/s22249674
  6. Freitas, J.R.; Pimenta, S.; Ribeiro, J.F.; Dong, T.; Yang, Z.; Correia, J.H.. "Simulation, fabrication and morphological characterization of a PDMS microlens for light collimation on optrodes". Optik (2020): 166098. http://dx.doi.org/10.1016/j.ijleo.2020.166098.
    10.1016/j.ijleo.2020.166098
  7. Esteves, Bruno; Pimenta, Sara; M. F. Vieira, Eliana; Freitas, João R.; Rodrigues, José A.; Correia, José H.. "SnOx and a-Si thin-films based photodiode in a flexible substrate for visible spectral region". Materials Letters (2020): 129251. http://dx.doi.org/10.1016/j.matlet.2020.129251.
    10.1016/j.matlet.2020.129251
  8. Silva, M.F.; Pimenta, S.; Rodrigues, J.A.; Freitas, J.R.; Ghaderi, M.; Goncalves, L.M.; de Graaf, G.; Wolffenbuttel, R.F.; Correia, J.H.. "Magnesium fluoride as low-refractive index material for near-ultraviolet filters applied to optical sensors". Vacuum (2020): 109673. http://dx.doi.org/10.1016/j.vacuum.2020.109673.
    10.1016/j.vacuum.2020.109673

Intellectual property

Provisional application for patent
  1. 2021. "EP4018930A1: Neuronal Device for Optogenetic Applications and Neuronal Activity Monitoring in an Animal and Its Use".
  2. 2020. "PT116977: Dispositivo Neuronal para Aplicações Optogenéticas e Monitorização da Atividade Neuronal de um Organismo Animal e o Seu Uso".