Micron has hired a former senior executive from Nvidia to manage its expansion of memory chips for tablets and smartphones. Michael Rayfield, who left Nvidia last month, will take the role of Micron's vice president of Wireless Solutions Group.

He will be in charge of DRAM and NAND flash chips for mobile devices. Rayfield was heavily involved in Nvidia's ongoing expansion from its core PC graphics chip business into mobile devices with its Tegra processors.

Micron is looking for new ways to make cash with PC sales barely growing. The plan is to follow Samsung Electronics and other memory chipmakers as they look at chips for tablets and smartphones.

Data released last week by market research firm IHS iSuppli showed that for the first time since the 1980s, personal computers no longer account for the majority of demand for DRAM memory chips,