FACTOID # 10: The total number of state executions in 2005 was 60: 19 in Texas and 41 elsewhere. The racial split was 19 Black and 41 White.
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Encyclopedia > Chalcogenide

A chalcogenide is a binary compound consisting of a chalcogen and a more electropositive element. The electropositive element is often introduced by doping but not always necessary. In selenium compounds charge separation may result from branching. Gold chalcogenides are minerals and chalcogenide glasses are photoconductive and used in xerography and television. The chalcogens (with the ch pronounced with a hard c as in chemistry) are the name for the periodic table group 16 (old-style: VIB or VIA) in the periodic table. ... An electropositive atom, or element, is one that easily loses electrons. ... In semiconductor production, doping refers to the process of intentionally introducing impurities into an intrinsic semiconductor in order to change its electrical properties. ... General Name, Symbol, Number selenium, Se, 34 Chemical series nonmetals Group, Period, Block 16, 4, p Appearance gray, metallic luster Atomic mass 78. ... Gold chalcogenides are gold compounds with anions from periodic table group 16, known as the chalcogens. ... A Chalcogenide glass is a glass containing a chalcogenide element (sulphur, selenium or tellurium) as a substantial constituent. ... Photoconductivity is an optical and electrical phenomenon in which a material becomes more conductive due to the absorption of electro-magnetic radiation such as visible light, ultraviolet light, or gamma radiation. ... Chester F. Carlson Xerography (or Electrophotography) is a photocopying technique developed by Chester Carlson in 1938 and patented on October 6, 1942. ...


  Results from FactBites:
Method of making memory cell incorporating a chalcogenide element - Patent 5970336 (6131 words)
A chalcogenide material is disposed in the pores by depositing a layer of chalcogenide material on the silicon nitride layer and planarizing the chalcogenide layer to the silicon nitride layer using CMP.
The chalcogenide material is ovonic in that the observable structural/resistance change exhibited is a variation of the Ovshinsky Effect, and is a function of the current which is applied to the chalcogenide element through the diode.
The chalcogenide layer, upper carbon layer, and TiN layer form a stack that is masked and etched to remove the stack constituents, except in the vicinity of the pore.
Home: Ashtosh Ganjoo's Home (543 words)
We use a chalcogenide layer as the cladding and another layer to act as core of the waveguide.
Chalcogenide materials transmit in the mid and far IR region and this creates numerous applications in the civil, medical and military areas.
Chalcogenide waveguides are well suited for chemical sensing applications since practically most molecular species vibrate in the infrared region and chalcogenide materials transmit (no absorption) in the infrared region.
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