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dielectric constant |
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dielectric constant [‚dī·ə′lek·trik ′kän·stənt] (electricity) For an isotropic medium, the ratio of the capacitance of a capacitor filled with a given dielectric to that of the same capacitor having only a vacuum as dielectric. More generally, 1 + γχ, where γ is 4π in Gaussian and cgs electrostatic units or 1 in rationalized mks units, and χ is the electric susceptibility tensor. Also known as relative dielectric constant; relative permittivity; specific inductive capacity (SIC). How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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It requires no field calibration, withstands high temperatures, and works with materials having a wide range of bulk densities and dielectric constants. The method has application to the semiconductor industry in their pursuit of new interlayer materials with low dielectric constants to reduce cross-talk and to increase processor speed as device features reach nanometer sizes. They quash tunneling currents admirably in laboratory experiments and also maintain a hefty gate capacitance thanks to dielectric constants 6 to 20 times that of silicon dioxide. |
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