TSMC chairman and CEO Morris Chang said that TSMC sales should not be affected by the earthquake in Japan and that the company is still planning on 20% sales growth in 2011.

Chang said that the company still has some inventory and that it has taken steps by acquiring second and even third supply sources. Namely, TSMC currently has at least four suppliers of raw wafer materials, with second sources in Taiwan, US and Europe.

Damage to Japan’s infrastructure may introduce supply disruptions and Chang said that he is unsure of whether it will affect TSMC’s 2012 expansion plans. Chang noted that while TSMC has contingency plans to support its expansion in 2012, there is no alternative source for some important equipment from Tokyo Electron Ltd.