POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY
EPROM silicon chip. Coloured scanning electron micrograph (SEM) of the surface architecture of part of an EPROM (Eraseable Programmable Read- Only Memory) silicon microchip. The narrow tracks (coloured) that have been deposited on the substrate (blue) form part of the chip's micro- circuitry. The pits in the tracks are connection points, where connections are made to circuit elements on the other side of the substrate. Image of an AMD AM27C512- 155DC chip. Magnification: x420 at 4x11cm size.
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