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单词 inversion layer
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inversion layer
inversion layer n. (a) (Meteorology) a layer of air in the atmosphere in which temperature increases with height; (in extended use) a layer in a body of water in which temperature increases with depth; cf. sense 7; (b) (in a metal-oxide-semiconductor transistor (see MOS n. at M n. Initialisms 1)) a conducting channel of electrons formed at the boundary between the semiconductor and the oxide, each having a charge opposite that of the holes (hole n. 4f).
ΚΠ
1905 Sci. Abstr. A. 8 168 Then comes a sudden change; the thermometer rises by several degrees, the humidity drops to 50; this inversion layer reaches up to 1,000 m.
1949 Physical Rev. 75 1208/2 The barrier layer is such as to raise the levels of the filled band to a position close to the Fermi level at the surface, giving an inversion layer of p-type or defect conductivity.
1983 New Scientist 3 Feb. 314/2 If the semiconductor is cooled sufficiently for all the electrons to be in the lowest permitted energy states, then the mobile electrons in the inversion layer can move only in two directions.
1987 Limnol. & Oceanogr. 32 70 Cool, dense water must be advected horizontally below the inversion layer by the river entering the lake from the south.
2001 Independent on Sunday (Nexis) 26 Aug. 18 LA is ringed with mountains that create an inversion layer that traps ozone and irritants in a brown sky.
2010 D. Vaslleska et al. Computational Electronics viii. 369 Such quantum effects play an important role even at room temperature, where the width of the inversion layer is of the same order of magnitude as the thermal wavelength of the carriers.
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