[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 10.5% Quarter-over-Quarter Decline in Revenues Resulting in Earnings per Share of NT$ 0.48 or Earnings per ADS of US$ 0.08 for First Quarter 2010 Siliconware]