JOHN WALSH / SCIENCE PHOTO LIBRARY JOHN WALSH / SCIENCE PHOTO LIBRARY
Light micrograph of part of a UV-EPROM integrated circuit or silicon chip. UV-EPROM stands for UV erasable permanent read-only memory. It is a type of memory chip whose data can be erased by ultra- violet (UV) light so that it can be reprogrammed with new data. Magnification: x50 at 35mm size.
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