Investigation of Minority Carrier Distribution in Semiconductor-Controlled Rectifier Devices and the Impact on Electrostatic Discharge Applications
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概要
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In this paper, a physical mechanism is proposed where the holding voltage of the semiconductor-controlled rectifier (SCR) is predominated by the accumulation of minority carriers. Two-dimensional simulation is used to demonstrate this mechanism where the carrier distribution of SCR devices is calculated and analyzed. It has been clearly proven that the distribution of minority carriers highly correlates to holding voltage. Accordingly, a layout approach has also been designed and experiments have confirmed that an increment in holding voltage can be performed. It can be concluded that the optimization of the topological structure will markedly increase holding voltage and eventually prevent the complementary metal–oxide–semiconductor (CMOS) integration circuit from minimizing the latch-up effect. Moreover, because of its high current capabilities, the optimized SCR can be used as an ideal candidate for electrostatic discharge protection (ESD) applications.
- 2009-02-25
著者
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Lee Jam-wem
National Nano Device Laboratories
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Tai Ya-Li
Department of Electrical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
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Lien Chen-Hsin
Department of Electrical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
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Lee Jam-Wem
National Nano Device Laboratories, Hsinchu 300, Taiwan
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