Researched
DRAM main memory
Robert Dennard's one-transistor memory cell (1966) put cheap, dense working memory on a chip; Intel sold the first DRAM in 1970.
Open in the interactive tree →Robert Dennard at IBM invented the one-transistor, one-capacitor DRAM cell in 1966 (patent 1968), a replacement for bulky magnetic-core memory. Intel's 1103, launched in 1970, was the first commercial DRAM chip and soon outsold core memory. Every PC, phone and server still keeps its working data in DRAM, including the stacked high-bandwidth memory beside today's AI chips.
Prerequisites
- Integrated Circuit1958-1959
- MOSFET and CMOS chips1959
Unlocks
- AI Accelerators & Data Centers2026High-bandwidth memory beside AI chips is stacked DRAM