TransphormHighest Performance, Highest Reliability GaN


Welcome to the GaN Revolution!

Transphorm is a global semiconductor company, leading the GaN Revolution with the highest performance, highest reliability GaN devices for high voltage power conversion applications. To ensure this, Transphorm deploys its unique vertically-integrated business approach that leverages the industry’s most experienced GaN engineering team at every development stage: design, fabrication, device and application support. This approach, backed by one of the industry’s largest IP portfolios with over 600 patents, has yielded the industry’s only JEDEC- and AEC-Q101-qualified GaN FETs. Transphorm’s innovations are moving power electronics beyond the limitations of silicon to achieve over 99% efficiency, 40% more power density and 20% lower system cost—and here’s how we do it.

Transphorm is dedicated to educating and supporting customers developing with high voltage GaN. Let us know how we can help you!

Since its founding in 2007, Transphorm has achieved a number of milestones and industry firsts.


First samples of 600V GaN-on-SiC with no current collapse/dynamic Ron


First 600V GaN-on-Si


First JEDEC qualified high voltage GaN


IP and manufacturing partnership with Fujitsu Semiconductor Japan


First generation GaN products in production
First customers in production


First long-term intrinsic lifetime testing for GaN established


Second generation GaN products in production


Silicon Valley Center of Excellence established
Customers delivering industry-first products and systems with GaN


First automotive (AEC-Q101) qualified GaN


Third generation GaN products in production


Mario Rivas

Mario leads all functional areas of Transphorm and brings over 30 years of executive level leadership to the company.  Prior to joining Transphorm, Mario was president and CEO of the semiconductor company ANADIGICS. Before ANADIGICS, he was the CEO of Quartics, a fabless semiconductor and software company. Mario has also held executive positions at AMD, Philips Semiconductor, and Motorola.  Mario earned a B.S. in Electrical Engineering from the Universidad Centroamericana “José Simeón Cañas” as well as a M.S. in Semiconductor Physics and M.S. in Management from Rensselaer Polytechnic Institute.

Umesh Mishra, Ph.D.
CTO & Co-Founder

Umesh is responsible for the strategic direction of Transphorm, as well as customer relationships and technology. Prior to co-founding Transphorm in 2007, Umesh co-founded Nitres Inc. in 1996 – the first company to develop GaN LEDs and transistors. Nitres was acquired by Cree in 2000. Umesh was elected to the National Academy of Engineering in 2009 and received the IEEE David Sarnoff Award for “The Development of Gallium Nitride Electronics”. He is also Professor Above-Scale (the highest academic rank in the University of California system) in the ECE Department at the University of California, Santa Barbara where he has been a director of several GaN research centers.

Primit Parikh, Ph.D.
COO & Co-Founder

Primit co-leads overall strategy at Transphorm. He is also responsible for P&L, key customer relationships and products, engineering and manufacturing. Primit has over 10 years experience in business area leadership and over 15 years in GaN / semiconductor development, technical marketing and intellectual property. Prior to Transphorm, Primit led GaN electronics at Nitres Inc. through its acquisition by Cree, where he served as head of Advanced Technology at Cree SBTC in charge of GaN development and government business. Primit received his B.Tech. in EE from IIT, Mumbai and his Ph.D. in ECE from UCSB. He has more than 30 patents awarded/pending in the area of GaN materials, devices and circuits, and has co-authored more than 70 publications and presentations.

Yifeng Wu, Ph.D.
Senior VP, Engineering

Yifeng joined Transphorm in 2008, leading the engineering effort in developing GaN power conversion device products and topology applications. He previously worked at WideGap Technology LLC and Cree Inc. for 11 years.  He received his Ph.D. degree from UC Santa Barbara, where he established himself as a pioneer in GaN Electronics. His contributions span from basic device process to cutting-edge device designs, including millimeter-wave HEMTs and kV-class high-efficiency power converters. He was the first to demonstrate a GaN microwave power HEMT and set several world records for the highest power densities of any solid-state transistor. He holds 87 US patents and has authored many high-impact papers, resulting in more than 7000 citations in Google Scholar.

Cameron McAulay

As Chief Financial Officer, Cameron is responsible for overseeing all financial aspects of the company. Prior to joining Transphorm, he served as Finance Director, Global Customer Organization and Director of Internal Audit with KLA-Tencor Corporation.  He also served as Finance Director and Group Financial Controller at Atmel Corporation and had a 7 year tenure at National Semiconductor Corporation in a variety of Operational and Corporate leadership positions including Chief Audit Executive. He holds a BSc. Mathematics, Statistics and Accountancy from Strathclyde University and is a member of the Chartered Accountants of Scotland.

(English) Philip Zuk
VP Technical Marketing

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(English) Marc Murphy
VP World Wide Sales

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Randy Berg
Human Resources Leader

Randy leads the company’s efforts supporting a workplace that fosters innovation and engagement. He brings 25 years of experiences to the team including leadership of critical initiatives in wafer fab oriented operations when the data storage industry was expanding and changing at a torrid pace.  His HR career spans a variety of challenging technical industries including data storage, telecom, defense, staffing, and most recently in the very dynamic and evolving LED technology space. Randy’s education includes an MS in Social Science from Azusa Pacific University and a BA in Communication from Biola University.


At Transphorm we believe our people make the difference and drive our business performance. Every employee is critical to our success; together we make one successful team. We foster an environment that encourages innovation, creativity, excellence and results through teamwork. Hard work is expected and rewarded.

Our culture is built on integrity, honesty and a high level of business ethics. We strive to practice leadership that teaches, inspires and promotes full participation and career development. We encourage open and effective communication and interaction.

Transphorm is committed to working with and providing reasonable accommodation to individuals with disabilities. If your medical condition or disability prevents you from completing the online application process, please feel free to so that we can provide options to assist you with completing the application process.

Transphorm employees enjoy attractive stock options, competitive salaries and a comprehensive benefits program.

Transphorm is proud to be an Equal Opportunity Employer. Applicants who apply for a position are considered without regard to race, color, religion, sex, national origin, age, physical or mental disability, sexual orientation, gender identity, ancestry, marital or veteran status.

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