Dr. P. H. Chang was appointed as Vice President of Materials Management and Risk Management in TSMC in August 2009, after serving as Vice President of Human Resources in TSMC for five and a half years.

Dr. Chang joined TSMC as a result of the merger between TSMC and Worldwide Semiconductor Manufacturing Company in July, 2000 and served as Director and later on Senior Director of Materials Management. Prior to the merger, from 1998 to 2000, he was Vice President of Administration at WSMC, responsible for Human Resources, Procurement, and Facilities Management. From 1984 to 1990 and later on from 1996 to 1998 He worked for Texas Instruments as a Member of Technical Staff and Deputy Process Engineering Manager, respectively. In the interim years, from 1991 to 1996, he was a Professor of Materials Science and Engineering at National Chiao Tung University at Hsinchu, Taiwan.

From 1981 to 1984, he was a Research Engineer at Inland Steel Company, East Chicago, IN, developing high strength sheet steel products for automobile applications and tubular steel products for oil industry applications.

Dr. Chang received his Ph.D. and M.S. degrees in Materials Engineering from Purdue University, W. Laffayette, IN, in 1981 and 1977, respectively, and a Diploma in Metallurgical Engineering from Taipei Institute of Technology, Taipei, Taiwan in 1972.