SEM of the surface of an EPROM microchip

SEM of the surface of an EPROM microchip

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Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY.

Caption: False colour scanning electron micrograph (SEM) of a TM 2716 integrated circuit, showing details of the surface architecture. This chip is of the EPROM type - Electrically Programmable Read Only Memory. EPROM chips are programmed by applying a voltage across selected connecting pins. Some such devices may then be subsequently reprogrammed - other types may not. The chip appears without the quartz window that normally covers it; the window is masked with tape once the unit has been programmed. Removal of the tape and exposure of the underlying circuitry to ultraviolet light would erase the programme. Magnification: X 86 at 35mm size. ORIGINAL IS BW PRINT T370/452. The TM 2716 EPROM chip is of the NMOS type (n-type

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Keywords: chip, computer chip, electron micrograph, electronic, electronics, eprom chip, high-tech, integrated circuit, microchip, scanning, sem, silicon, surface detail, technology

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