Memory Technology 2021: Trends & Challenges

DRAM and NAND Flash memory demands for server, datacenter, cloud, mobile and AIOT including ML, autonomous and connected vehicles application have been increased on and on. In addition, emerging memory market such as STT-MRAM, ReRAM, PCRAM, FeRAM and 3D XPoint Memory are expected to reach ${\$}36B$ by 2030. Memory technologies have quite different stories from Logic devices which is referring to Moore’s Law. DRAM, NAND Flash and Emerging memory makers are racing of device scaling, however many of electrical and physical limits are coming into reality. We overview current memory technology, and further discuss the details, trends, and upcoming challenges.