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gallium arsenide |
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gallium arsenideAn alloy of gallium and arsenic compound (GaAs) that is used as the base material for chips. Several times faster than silicon, it is used in high frequency applications such as cellphones, DVD players and fiber optics. In 2001, Motorola developed a technique that places a spongy layer between gallium arsenide and silicon on the same wafer. Combining these two materials yields a higher-speed product at a lower cost. See gallium nitride. gallium arsenide [′gal·ē·əm ′ärs·ən‚īd] (inorganic chemistry) GaAs A crystalline material, melting point 1238°C; frequently alloys of this material are formed with gallium phosphide or indium arsenide. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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To build the new ion device, Monroe and his colleagues used conventional microchip-fabrication methods to first deposit layers of the semiconductor compounds gallium arsenide and aluminum gallium arsenide onto a gallium arsenide wafer. Three substances for which there were no previous IARC evaluations have now been evaluated and classified: gallium arsenide is classified as a Group I human carcinogen, indium phosphide as a Group 2A (probable) human carcinogen, and vanadium pentoxide as a Group 2B (possible) human carcinogen (IARC, in press a). Los Angeles-area manufacturers pioneering the use of a space-age compound called gallium arsenide have received another boost, as an Orange County corporate-investment firm announced it expects by January to buy out the top producer of solar cells made from gallium arsenide, citing its promising "growth potential. |
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