This seems like old EPROM tech where (UV) light would erase the chip: https://hackaday.com/2018/01/17/improvising-an-eprom-eraser/ https://hackaday.com/2018/01/

This seems like old EPROM tech where (UV) light would erase the chip: https://hackaday.com/2018/01/17/improvising-an-eprom-eraser/ https://hackaday.com/2018/01/17/improvising-an-eprom-eraser/ -- Credit Card reader terminals had these chips inside of them so upon disassembly, it'd delete the encryption keys inside of the machine. They also had a battery that if it ran out, would wipe temporary keys. This seems like similar tech.