Tendai J. Mafireyi
Summary
Experienced Etch Process Engineering professional with a strong background in Applied Materials Centris Sym3, as well as TEL NT333 ALD tools. Proficient in LTD R&D for dry etch processes, specifically focused on oxide and silicon TSV formation. Skilled in utilizing SPC and DOE techniques for effective process monitoring and optimization, resulting in significant yield improvement. Committed to delivering high-quality results and continuously enhancing process efficiency.
Overview
9
9
years of professional experience
Work History
Process Engineer
Tokyo Electron Limited
10.2024 - Current
- Participated in project reviews to enable ongoing status tracking and reporting.
- Troubleshooting customer tool issues and process optimization
Process Engineer
Intel Corporation
11.2021 - 08.2024
- Tool and process development in Through-silicon Via (TSV) dry etch
- Hand-on AMAT and TEL tool qualification and maintenance
- Process parameters and defects SPC management
- New Product Introduction lead, outlining DOEs for multiple technology nodes
- Etch and Ash process ownership, increasing Manufacturing Availability by 20%
- Experienced in using statistics analysis tools such as JMP, GAJT, SQL and E3 FDC
- Stakeholder management and partnerships with Integration, Q&R and Tool Supplier
- Failure Mode and Effects Analysis (FMEA) lead, defining tool failure criteria and driving data collection for decision-making
Graduate Research Assistant
Portland State University
01.2016 - 01.2021
- Patented first of a kind, selenium-based NIR fluorophores selective for Thioredoxin Reductase
- Successfully imaged and characterized melanoma cells, through enzyme-probe interactions
- Developed novel HPLC characterization and purification methods for diselenide-based fluorescent probes, improving yield by 30%
- Enzyme-probe docking simulations using Avogadro, Autodock Vina and UCSF-Chimera
- Calibrated and maintained HPLC, LC-MS and Spectrophotometry instruments following vendor procedures
- Performed cell imaging on cancer cells to identify overexpressed enzymes using a Zeiss inverted microscope and Axioscan fluorescence camera
Education
Ph.D - Chemistry
Portland State University
12.2021
BSc (Hons) - Chemistry
Nelson Mandela University
12.2014
Skills
- Data analysis
- Process development
- Team collaboration
- Process validation
- Process flow analysis
- Root-cause analysis
Publications And Patents
- A Diselenide turn‐on Fluorescent Probe for the Detection of Thioredoxin Reductase, T.J. Mafireyi, M. Laws, J.W. Bassett, P.B. Cassidy, J.O. Escobedo, R.M. Strongin, Angewandte Chemie, 2020, https://doi.org/10.1002/anie.202004094
- Fluorogenic probes for thioredoxin reductase activity, T.J. Mafireyi, J.O. Escobedo, R.M. Strongin, Results in Chem, 2021
- Functional synthetic probes for selective targeting and multi-analyte detection and imaging, Y. Yue, F. Huo, F. Cheng, X. Zhu, T. Mafireyi, R.M. Strongin, C. Yin, Chem. Soc. Rev, 2019, https://doi.org/10.1039/C8CS01006D
- Seminaphthofluorophore-selenium probes for Thioredoxin Reductase, PCT/US 20/52511, 09/24/20
Awards And Leadership
- 2024, Technology Development Award in improving module health and output
- 2022, Module Safety and Manufacturing Availability Champion
- 2020, Top graduate student talk: Sigma Xi annual national research conference
- 2020, First Place, Oregon Academy of Science and Sigma Xi Columbia-Willamette Chapter Student Research Symposium
- 2020, Second place in the Pfizer NOBBCCHE presentations
- 2018, Runner up: Sigma XI presentations: Columbia-Willamette Chapter
- 2014, Rhodes Scholarship Finalist
- 2014, South Africa National Research Foundation Award: Research and Innovation
- 2013-2014, President, Chemistry Society Nelson Mandela Chapter
Timeline
Process Engineer
Tokyo Electron Limited
10.2024 - Current
Process Engineer
Intel Corporation
11.2021 - 08.2024
Graduate Research Assistant
Portland State University
01.2016 - 01.2021
BSc (Hons) - Chemistry
Nelson Mandela University
Ph.D - Chemistry
Portland State University
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