What is silicon dioxide?

  • (noun): A white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechartelierite.
    Synonyms: silica, silicon oxide

Silicon Dioxide

The chemical compound silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with the chemical formula SiO2. It has been known for its hardness since ancient times. Silica is most commonly found in nature as sand or quartz, as well as in the cell walls of diatoms.

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Some articles on silicon dioxide:

Charge Trap Flash - Future Charge Trap Directions - Charge Trapping Layers For Vertical Structures - Toshiba’s BiCS and Samsung’s 3D NAND
... the number of bits in a given area of silicon ... In this drawing the red portions represent conductive polysilicon, the blue is silicon dioxide insulating layers, and the yellow is the nitride charge trapping layer ... To manufacture such a device layers of conducting polysilicon and silicon dioxide dielectric are deposited first on top of a silicon substrate that contains standard CMOS logic elements ...
MOSFET Scaling - Difficulties Arising Due To MOSFET Size Reduction - Increased Gate-oxide Leakage
... However, with current gate oxides with a thickness of around 1.2 nm (which in silicon is ~5 atoms thick) the quantum mechanical phenomenon of electron ... Silicon dioxide has traditionally been used as the gate insulator ... Silicon dioxide however has a modest dielectric constant ...
Silicon Dioxide - Health Effects
... Plant materials with high silica phytolith content, appear to be of importance to grazing animals, from chewing insects to ungulates ... Studies have shown that it accelerates tooth wear, and high levels of silica in plants frequently eaten by herbivores may have developed as a defense mechanism against predation ...
Silicon Compounds - Characteristics - Occurrence
... See also Silicate minerals Measured by mass, silicon makes up 27.7% of the Earth's crust and is the second most abundant element in the crust, with only oxygen having a greater abundance ... Silicon is usually found in the form of complex silicate minerals, and less often as silicon dioxide (silica, a major component of common sand) ... Pure silicon crystals are very rarely found in nature ...
Chemical Vapor Deposition Of Diamond - Commerically Important Materials Prepared By CVD - Silicon Dioxide - Metals
... CVD processes for molybdenum, tantalum, titanium, nickel are widely used ... These metals can form useful silicides when deposited onto silicon ...