Memory backend service companies have posted mixed results for July, with Powertech Technology (PTI) and Formosa Advanced Technologies (FATC) seeing their revenues decline for the month, while Walton Advanced Engineering saw revenues edge up slightly.

PTI has reported July consolidated revenues of NT$3.3 billion, down 9.1% on month. Revenues reached a high base in June, as customers made advance shipments in a move to settle accounts at the end of the second quarter, the firm indicated.

Cumulative revenues from January to July totaled NT$24.48 billion, representing a 5.2% increase as compared to the same period of 2011, PTI disclosed.

Revenues at FATC, which provides backend services mainly for chipmakers Nanya Technology and Inotera Memories, slipped 2.8% on month to NT$975 million in July. Revenues for the first seven months of 2012 amounted to NT$6.75 billion, a 8.4% decline from a year earlier.

In contrast, Walton saw its consolidated sales increase 1.6% sequentially to NT$762 million in July 2012. The firm credited the growth to stable orders for standard DRAM memory.

Consolidated revenues for January through July came to NT$4.81 billion, down 9.1% from the same period of 2011, according to Walton.

With upstream chipmakers cutting back production, these memory-IC packaging and testing specialists are likely to post a 5-10% sequential drop in third-quarter sales, market watchers expect.

PTI previously reiterated that the firm would continue to reduce its exposure to the standard DRAM market, while enhancing its offerings for logic semiconductors. PTI has expressed caution about its performance in the third quarter, citing disappointing PC sales that would hurt its DRAM business as well as unfavorable economic conditions.

Rival Walton is scheduled to hold its quarterly investors meeting today (August 9) to provide its outlook for the latter half of 2012.