Micron pulls the plug on future 4F² DRAM after two decades of research in dramatic shift

DRAM featuring 4F² memory cells has long been considered one of the holy grails of the DRAM industry, as they promise to reduce cell area by 33% compared with conventional 6F² designs and therefore enable building DRAMs with more memory cells in the same area. However, after working on 4F² memory cells for a couple of decades, Micron has concluded that the architecture offers no meaningful density advantages, increases manufacturing complexity and costs, and has fundamental scaling limitations. This has a dramatic impact on Micron's future plans.

"Micron invented 4F² DRAM," said Scott DeBoer, president and chief technology and products officer at Micron, during the company's event on Wednesday. "The path with 4F² DRAM is always been an option through time, and we have evaluated it and not pursued it due to increased complexity and cost through this past two-decade period of time."

Interestingly, both Samsung and SK hynix still have 4F² memory cells in their roadmaps (according to TechInsights), …