题目内容
In the long-channel device, the channel length Lis much longer than the mean distance between collisions l, so that an average carrier drift velocity exists. If the channel length is reduced so that L < l, then a large fraction of carriers could travel from the source to the drain without experiencing a scattering event. This motion of carriers is called ______ .
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The short-channel threshold shift becomes larger when the substrate doping increases. ()
In actual technology evolution, voltages have not been reduced with the same scaling factor. Electric fields in MOS devices have tended to increase as device dimensions shrink. ()
To ensure that the reliability of the scaled device is not compromised, the electric fields in the scaled device must ___________
As the channel length decreases, the threshold voltage shifts in the ______ direction so that an n-channel MOSFET shifts toward ________ mode.
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