from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A substance, such as boron, added in small amounts to a pure semiconductor material to alter its conductive properties for use in transistors and diodes.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A substance added in small amounts to a pure semiconductor material to alter its conductive properties.
from the GNU version of the Collaborative International Dictionary of English
- n. a foreign substance added to a material to alter its properties; -- a process used. e.g., in making semiconductors from pure silicon in the manufacture of semiconductor chips and integrated circuits.
Silicon crystals are drawn as a boule from molten silicon (requiring large amounts of energy and time), are sawn into wafers into which dopant diffusions are implanted (again in furnaces requiring energy and time).
Another possible gene dopant: the ACE (for angiotensin converting enzyme) gene.
D'ailleurs beaucoup de sportif l'utilise comme dopant et on s'en sert aussi pour soigner les addiction a la cocaïne ...
Since we had found previously that by adding bromine to the golden (SN) x material, we could increase its conductivity tenfold, we thought that perhaps the impurity in the polyacetylene was acting as a dopant and was actually increasing the conductivity of the polyacetylene, rather than decreasing it.
As a result, we found that the emergence of electrical conductivity on the doped polyacetylene was due to the creation of carbocations or positively charged solitons associated with withdrawing of p electrons from polyacetylene by the dopant when iodine was used as an acceptor dopant.
· The strength of the field depends on the amount of dopant in the silicon.
The latest devices, though, are so small that doping their channels involves placing just a handful of dopant atoms among the silicon.
Dr Colinge's design-which, like Intel's Tri-Gate, clamps a 3D gate around a single, ultra-thin silicon wire-avoids this by building the entire device from a single type of semiconductor, with much higher dopant concentrations than a conventional flat transistor.
The Georgia Tech process is believed to be the first to provide both electron and hole doping from a single dopant material.
A theme of particular interest to the future of working with silicon is silicon single-dopant and electron spin technology, for which six academics will present cutting-edge nanotechnologies for working with dopants (impurities) in silicon.
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