DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY
EPROM silicon chip. Coloured Scanning Electron Micrograph (SEM) of the etched surface of part of an EPROM silicon chip. Here, narrow tracks form part of the chip's circuitry; at left are rows of memory cells. This is an integrated circuit. The chip is of the EPROM type: Electrically Programmable Read-Only Memory. EPROM chips are programmed by applying a voltage across selected connecting pins. The memory cells can be switched electrically so that the chip stores the information programmed into it. By shining ultra- violet light on the chip, the programming is erased and it can then be reprogrammed. Magnification: x180 at 6x4.5cm size.
Model release not required. Property release not required.