Packaging and testing firm Powertech Technology (PTI) expects sales of its NAND flash memory products to grow and contribute to sequential revenue growth in the second quarter of 2012.

NAND flash clients have stepped up their pace of orders, said PTI, adding that shipments for related devices will rise in the second quarter.

Toshiba reportedly is among PTI's major flash customers.

Consolidated revenues at PTI declined 9.9% sequentially in the first quarter of 2012, due mainly to a substantial decrease in sales generated from its DRAM product segment. The firm has reiterated its move to focus on non-DRAM products.

PTI used to have more than 70% of revenues generated from its DRAM packaging and testing business. The sales ratio slid to 60% in the first quarter.