Advanced Semiconductor Engineering's (ASE) sales of its core IC ATM (assembly test and material) business registered a 5.8% sequential decrease in November, while sales at fellow company Siliconware Precision Industries (SPIL) fell at a similar rate on month.

　　ASE's IC ATM operations posted revenues of about NT$13.4 billion (US$422 million) in November 2013, up 4.8% from a year ago, however.

　　ASE's consolidated revenues, which consist of sales generated by EMS subsidiary Universal Scientific Industrial (USI), grew 5.8% sequentially and 13.4% on year to NT$21.97 billion in November.

　　ASE remarked previously that sales of its IC ATM business would register flat growth or an up to 3% decrease sequentially in the fourth quarter of 2013, while sales of its EMS business would increase about 25% on quarter. The EMS unit has enjoyed growing shipments of Wi-Fi modules.

　　ASE's cumulative 2013 consolidated revenues through November totaled NT$198.43 billion, rising 13.4% from a year earlier.

　　Fellow packaging and testing company SPIL has reported consolidated revenues of about NT$6.2 billion for November 2013, down 5.4% on month but up 12.2% on year. Accumulated 2013 revenues through November amounted to NT$63.27 billion, representing growth of 5.7% from a year ago.

　　Market watchers expect SPIL to post a sales decrease of up to 6% sequentially in the fourth quarter of 2013, with actual performance to be determined by demand for mobile chips.

　　SPIL chairman Bough Lin said previously that short lead-time orders could emerge to boost the company's overall sales for the fourth quarter. Lin estimated that utilization rates for SPIL's wire-bonding and logic IC testing would be negatively affected by a slowdown in demand for PCs and consumer electronics devices while those for its flip-chip and bumping packaging would reach 90-94% driven by orders for mobile chips. Lin did not provide any revenue guidance.