Electronics: silicon-wafer-oblique-gold-

Taken 20040515 in afternoon outside. The background is a gold-coloured gift box.
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(Electronics): silicon wafer oblique gold background 1 DHD.jpg
D=2004-05-15 [May 15, 2004]; S=2MB, 3264x2448; T=JPEG image [MIME:image/jpeg].

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silicon = Si, semiconductor = Common semiconductor used in manufacture of digital "silicon chips" or "microchips" such as CPUs, memory (RAM, ROM, DRAM, EPROM, EEPROM, Flash, etc), and simpler/analogue devices such as amplifiers and individual bipolar transistors or FETs or diodes. Note that other semiconductors such as Germanium (Ge) and Gallium Arsenide (GaAs) can be used to make devices with different characteristics cf silicon equivalents such as higher speed in return for higher leakage.
silicon wafer = Often-circular slice of very pure Silicon on which multiple devices are fabricated, and from which individual "silicon chips" or "microchips" are cut to be packaged up if they pass testing.