False-colour SEM of part of a DRAM

False-colour SEM of part of a DRAM

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Credit: DAVID SCHARF/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph of part of a 256-kilobyte (DRAM) Dynamic Random Access Memory integrated circuit, or silicon chip. The colours distinguish the layers of electronic pathways which cover the surface of the chip. The half-sunken pad on each light blue pathway is a single transistor memory cell. Each DRAM will have 2-4 million such transistors. DRAMs do not store information on a permanent basis; instead their memory cells are refreshed every 2 milliseconds. A mainframe computer may contain 400-1000 DRAMs. The orange particles at far right are contaminants. Magnification: x1300 at 35mm size, x3100 at 6x6cm size.

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Keywords: chip, dram chip, dynamic random access memory, electron micrograph, electronic, electronics, false-coloured, high-tech, integrated circuit, memory chip, microchip, ram chip, random access memory chip, scanning, sem, technology

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