INVERSION-LAYER CAPACITANCE AND MOBILITY OF VERY THIN GATE-OXIDE MOSFET'S.

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作者
Liang, Mong-Song [1 ]
Choi, Jeong Yeol [1 ]
Ko, Ping-Keung [1 ]
Hu, Chenming [1 ]
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[1] Univ of California, Berkeley, CA,, USA, Univ of California, Berkeley, CA, USA
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ELECTRIC MEASUREMENTS - Capacitance;
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摘要
Inversion-layer capacitance has been experimentally characterized and identified to be the main cause of the second-order thickness-dependence of MOSFET characteristics. Field-dependent channel mobilities of both electrons and holes were independent of gate-oxide thickness from 50 to 450 angstrom; e. g. , there is no evidence of the alleged mobility degradation in very thin gate-oxide MOSFETs. Subthreshold slope, insignificantly affected by the inversion-layer capacitance, follows the simple theory down to 35 angstrom of oxide thickness. Empirical equations for inversion-layer capacitance and mobilities versus electric field are proposed.
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页码:409 / 413
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