Stephen D. Kelley

Stephen D. Kelley, Director

Steve Kelley joined the Onto Innovation board of directors in 2023. With over 30 years of leadership experience within the semiconductor industry, Mr. Kelley brings to Onto Innovation’s board of directors a strong background in executive management and first-hand knowledge of Onto’s customer base across the entire value chain. He currently serves as president and chief executive officer of Advanced Energy Industries, Inc., which designs and manufactures highly engineered power delivery systems for semiconductor wafer fab equipment and other mission-critical applications. Prior to that, he was president and chief executive officer of Amkor Technology, a leading outsourced semiconductor assembly and test (OSAT) company from 2013 to 2020, which gives him significant knowledge of advanced packaging processes. He has also held executive leadership roles at leading semiconductor manufacturers: Texas Instruments; Philips Semiconductors; and Cree. Mr. Kelley holds an SB ChE from the Massachusetts Institute of Technology and a JD from Santa Clara University.