silicon dioxide


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silicon dioxide:

see silicasilica
or silicon dioxide,
chemical compound, SiO2. It is insoluble in water, slightly soluble in alkalies, and soluble in dilute hydrofluoric acid. Pure silica is colorless to white.
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silicon dioxide

[′sil·ə·kən dī′äk‚sīd]
(inorganic chemistry)
SiO2 Colorless, transparent crystals, soluble in molten alkalies and hydrofluoric acid; melts at 1710°C; used to make glass, ceramic products, abrasives, foundry molds, and concrete.

silica, silicon dioxide

A white or colorless substance, nearly insoluble in water and in all acids except hydrofluoric; extremely hard; fuses to a colorless amorphous glass.

silicon dioxide

(SiO2) A hard, glassy mineral found in materials such as rock, quartz, sand and opal. In metal oxide semiconductor (MOS) chip fabrication, silicon dioxide is used to create the insulation layer between the metal gates of the top layer and the silicon elements below. See silica gel.
References in periodicals archive ?
With 200+ tables and figures to support the silicon dioxide market analysis, this report provides key statistics on the state of the industry and is a valuable source of guidance and direction for companies and individuals interested in the market.
provides Silicon dioxide market situation overview and supplies with a list of Silicon dioxide manufacturers and suppliers worldwide
Supply and installation of a furnace with a minimum horizontal housings 3, containing two tubes dedicated to deposition at low pressure (LPCVD) of silicon dioxide on the wafer both a 4 by 6 inches, in a tube by means of a low temperature process (LTO) and another from tetraethyl orthosilicate (TEOS).
The silicon dioxide particles were removed from the resulting mass by etching, and what remained were carbon-coated silicon crystals in a continuous, three-dimensional, highly porous structure.
Although carbon and silicon are members of the same family in the periodic table of elements, they seem unrelated because carbon dioxide is typically a gas whereas silicon dioxide, or silica, is commonly crystalline quartz or glass.
A unique type of amorphous silicon dioxide as viscosity modifier for high performance elastomers," G.
has won FDA acceptance for its new Glaskin silicon dioxide barrier coating technology for PET containers.
Without satisfactory replacements for silicon dioxide, the current insulator of choice, the potential for electrical cross talk between such closely packed wires will be enormous.
The second form, chemical penetration, is caused by the reaction between iron oxide (FeO) and silicon dioxide (Si[O.
Patent number 7,372,065 for employing commonly used semiconductor materials copper and silicon dioxide to form Programmable Metallization Cell (PMC) memory devices.
IBM intends to make use of "strained glass substrates" to fragment complementary metal oxide semiconductor (CMOS) chips into the materials that they're composed of: silicon and silicon dioxide powder.
A sampling of topics: present and future of Si-based transistor technology for memories; parameters of intrinsic point defects in silicon based on crystal growth, wafer processing, self- and metal- diffusion; wafer strength and slip generation behavior in 300 mm wafers; growth kinetics and electrical properties of ultrathin silicon dioxide layers; mobility enhancement and strain integration in advanced CMOS; breakthrough of in-line inspection technology in volume production for 65 nm node and beyond; and local strain measurement on strained Si/SiGe heterostructures using convergent beam electron diffraction analysis.