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False-colour SEM of part of a DRAM

False-colour SEM of part of a DRAM

T370/0370

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Credit

DAVID SCHARF / SCIENCE PHOTO LIBRARY 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.

Release details

Model release not required. Property release not required.

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