Research? I'm not. Physics? I can tell you it's far from permanent. You have charge stored surrounded by insulator. You quantum tunnel it in. Over time, it lea

Research? I'm not. Physics? I can tell you it's far from permanent. You have charge stored surrounded by insulator. You quantum tunnel it in. Over time, it leaks out. Anecdotally, I've had plenty fail. All else being equal, higher-density devices should fail more quickly in theory (but practice is often different from theory, and all else is rarely equal). Sorry. Upside: Periodically reading / re-writing should reset all the ones to ones and all the zeros to zeros. What I've always wanted was a hundred slot SD/CF card reader, which could access them all at once.