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 ?
A silicon dioxide layer is formed as the insulator between metal layers.
TruTag etches silicon dioxide particles in batches to create unique combinations of nano-pores of customizable shape and depth for each customer and industry.
In a recently published article in the journal Materials Horizons, Baratunde Cola, an associate professor in the Woodruff School of Mechanical Engineering at the Georgia Institute of Technology, highlights the potential of silicon dioxide nanoparticles coated with a high dielectric constant polymer for cooling power-hungry electronic devices.
They then dip the device in hydrofluoric acid, which eats away the silicon dioxide and frees the probe.
Typical roles for Tegal's etching systems used in MEMS and biochip fabrication include producing structures in silicon, silicon nitride, and silicon dioxide, in organic materials like BCB and polyimide and in noble metals, like platinum and gold.
8 percent) and the chemical compound silicon dioxide or sand (0.
A NIST researcher has played an important role in influencing the semiconductor industry to refute the previously accepted thermochemical model (or "E-model") of dielectric breakdown of reliability of ultrathin silicon dioxide.
In the furnace environment, the oxygen (O) from the silicon dioxide ([SiO.
The transistors are then insulated with silicon dioxide, which means that high and low voltage transistors can be packed more tightly.
Then, germination tests were carried out to study the reaction of various parameters effective on the growth of the seeds collected from various geographical areas to the saline level and silicon dioxide nanoparticles.