News Release

Contact:

Siliconware Precision Industries Co., Ltd.

No.45, Jieh Show Rd.

Hsinchu Science Park, Hsinchu Taiwan, 30056 www.spil.com.tw

Janet Chen, IR Director janet@spil.com.tw

+886-3-5795678#3675

Byron Chiang, Spokesperson byronc@spil.com.tw

+886-3-5795678#3671

Siliconware Precision Industries Reports a 3.8% Quarter-over-Quarter Decline in Revenues Resulting in Earnings per Share of NT$ 0.38 or Earnings per ADS of US$ 0.06 for Fourth Quarter 2011

Taichung, Taiwan, Jan 31, 2012