Nate Sheehan

Experience

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  California NanoSystems Institute (CNSI)

  Jan 2009 - Jun 2010

  Intern

  • Translated an electron tunneling simulation script to MatLab from Mathematica (2009).• Wrote a Tanner L-Edit EDA software Design Rule Checking (DRC) manual (2010).• Presented Powerpoint slides and a poster at CNSI UCSB for each project.

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  CMDITR HoP

  Jun 2010 - Aug 2010

  Intern

  • VECSEL laser setup (linear and V cavity).• VECSEL laser measurement.• Wrote a project report, and presented Powerpoint slides and a poster at internship colloquium. • Third place undergraduate poster presentation at MAES: Latinos in Science and Engineering, Inc. Fall 2010 conference.

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  National Nanotechnology Infrastructure Network

  Jun 2011 - Aug 2011

  Research Intern

  • Summer intern working on a novel device fabrication project.• Fabricated silicon nitride structures on an oxide topped Si wafer. • Learned to use many cleanroom tools at U of MN, including acid and solvent benches, PECVD, and an optical lithography stepper.• Introduced to graphene processing techniques and scanning electron microscopy (SEM).• Wrote a project report, and presented Powerpoint slides and a poster at national internship colloquium in Atlanta.

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  UC Santa Barbara

  Nov 2011 - Jun 2012

  Undergraduate Research Assistant

  • Fabricated acoustic Bragg reflectors devices in the UCSB cleanroom.• Cleanroom work including solvent cleaning, ICP dry etching, metal evaporation, photolithography, acid wet etching, and Dektak characterization.• Improved ICP dry etching recipe and wrote updated procedure. • Worked with a post-doc to deposit novel material in a sputtering chamber.• Trained to and then operated the sputtering chamber independently.• Characterized several devices using appropriate instruments, e.g. network analyzer. Show less

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  The University of Texas at Austin

  Aug 2012 - Aug 2018

  Graduate Research Assistant

  • Was a Graduate Research Assistant accumulating experience and skills to succeed in industry.• Fabricated and characterized innovative flexible nanomembranes; results so far have secured $500k in funding.• Fabricated record long wavelength epitaxially grown III-V diode lasers; devices led to a $360k grant renewal.• Developed and improved many cleanroom processes such as epitaxial membrane liftoff and transfer, ridge laser fabrication, thin film deposition, wet and dry etching of III-Vs and dielectrics, lithography, and wafer bonding.• Iterated and improved processes based on analyzing extracted data from experiments: doubled yield of 4+ processes.• Monitor, support, and troubleshoot processes, equipment, and group needs; strong organization and teamwork.• Operated and maintained 2 MBE systems; grew crystalline III-V epilayers, e.g. multi-layers and superlattices.• Grew and characterized MBE and cleanroom samples using standard techniques (e.g. SEM, XRD, PL, etc.).• Led 2016 MBE maintenance, managing daily schedule, weekly goals, and participation of other lab members.• Managed logistics: wafer and essential group supplies purchasing ( >$35k annually) and inventory; lab safety.• Trained 20+ students and interns, including supervising 10 interns. • NASCENT Best Mentor awards in 2016 (first place) and 2017 (third place).• Member of the LASE research group, PI Dr. Seth Bank. Show less

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  Skorpios Technologies, Inc.

  Aug 2018 - May 2022

  Process Integration Engineer

  • Process Engineer (R&D Process Integration) at Skorpios Technologies, Inc.• Core member of the Photonics team: develop, fabricate, and improve the team's products. • In-line quality assurance and trouble-shooting. • Process and specification documentation and updates. • Working with tool engineers and operators is critical to our success.

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  Toppan Photomasks, Inc.

  May 2022 - now

  Senior Engineer

  • Photomask Repair Engineer (Repair Process) at TPRR.• Member of BEOL engineering team.• In-line quality assurance and trouble-shooting. • Process and specification documentation and updates. • Work with other tool engineers and operators daily to manufacture product.• Cross-functional collaboration within the Engineering silo and company wide is critical to our success.