Advanced Semiconductor Engineering (ASE) saw net sales generated from its core ATM (assembly test and material) business slide 3.9% sequentially to NT$10.74 billion (US$356 million) in November, while Siliconware Precision Industries (SPIL) posted a sequential 2% sales increase.

On an annual basis, sales of ASE's ATM division rose 23.6% from NT$8.69 billion in November 2009, while SPIL's consolidated revenues for November 2010 showed a 10.2% decline compared to a year ago.

ASE collected NT$16.82 billion in November consolidated sales, which included revenues generated by Universal Scientific Industrial (USI). The figure showed a 0.5% decrease from October, but was 93.7% higher than the NT$8.69 billion registered in November 2009.

USI's financial results are reflected in ASE's consolidated figures as a result of an acquisition, which was completed in February 2010. Buoyed by contributions from USI, ASE saw consolidated revenues for the first 11 months of 2010 rise 119.5% from a year earlier to NT$169.2 billion.

SPIL generated consolidated revenues of NT$5.135 billion in November. Consolidated sales from January through November were NT$58.55 billion, up 9% from the same period of 2009.