South Korean chip giant SK hynix will start mass production of lower 20-nanometer class dynamic random access memory (DRAM) in the second half of this year, its chief said Friday. "It's possible from the early second half," Park Sung-wook, the chief executive officer of SK hynix said after the shareholders meeting earlier in the day.

The 20-nanometer processing technology can get 30 percent more productivity from 300mm-wafers than the preceding 25-nanometer-based production, and 50 percent more than the 29-nanometer technology.

Samsung Electronics started making DRAM for PCs early last year and since them it has been expanding to mobile DRAMs and server DRAMs.