Consolidated sales at IC packaging and testing houses Siliconware Precision Industries (SPIL) and King Yuan Electronics Company (KYEC) registered sequential drops of 1.3% and 3.7%, respectively, in the fourth quarter of 2013.

　　SPIL has reported December consolidated revenues of NT$6.09 billion (US$202.8 million), up 1.8% on month and 26.5% on year. Consolidated sales amounted to NT$18.84 billion in the fourth quarter of 2013, rising 16.7% from a year ago.

　　SPIL's sales result for the fourth quarter outperformed market watchers' estimates of an up to 5% sequential decrease. The watchers credited the better-than-expected result to a pull-in of orders for mobile chips.

　　SPIL is expected to enjoy a particularly strong first quarter of 2014, primarily thanks to effects of transferred orders after the shutdown of part of rival Advanced Semiconductor Engineering's (ASE) A7 plant, the watchers noted. Work at wafer-level processes of ASE's A7 factory located in southern Taiwan has been suspended due to improper disposal of wastewater.

　　KYEC has announced consolidated revenues of NT$1.2 billion for December 2013, down 2.3% on month but up 1.2% on year. Consolidated revenues for the fourth quarter totaled about NT$3.7 billion, falling slightly from NT$3.84 billion in the prior quarter.

　　Both SPIL and KYEC reportedly are among MediaTek's backend partners.