Difference between Logic Chip and Memory Chip front-end manufacturing process?
Memory processes differ from logic in a couple of ways:


specialized structures, like deep-well caps for DRAM or floating gates for Flash
lower leakage / higher threshold voltage (trade speed for standby power)
fewer metal layers to keep costs down


That said, it’s possible to make logic on DRAM process. Conversely, adapting a logic line for DRAM may require some retrofit and recalibration.