Layered Memory: How Two Floors Double the Data
In ordinary flash memory, a bit is stored in a single layer, and its signal hits a ceiling: the thinner the film, the less charge it can hold. Engineers have spent years trying to squeeze a bit more out of the material, but the gains were pennies. The authors of the new work took a different route: they stacked two floors of memory on top of each other and made them work as a pair.