Numerical Analysis of the Effect of P-Regions on the I-V Kink in GaAs MESFETs(Semiconductor Materials and Devices)
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概要
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In this paper, we describe the effect of p-regions on the I-V kink in GaAs FETs. A kink-free p-pocket-type self-aligned gate GaAs MESFET (PP-MESFET), which does not include p-regions under the channel, has been analyzed and compared with a conventional buried-p-type self-aligned gate GaAs MESFET (BP-MESFET) using two-dimensional device simulation. The relation between the I-V kink and the layout of pregions has been demonstrated by numerical simulation for the first time. For both the BP-MESFET and PP-MESFET, impact ionization produces holes in high-field regions. The holes accumulate under the channel, widen the channel, and cause an abrupt increase in drain current in turn in the BP-MESFET. On the other hand, in the PP-MESFET, holes generated in the high-field region are transported to the source region easily over the lower barrier owing to the absence of p-regions under the channel. Holes do not accumulate under the channel, leading to kink-free I-V characteristics of the PP-MESFET. P-regions should be located so as not to cause the accumulation of holes in GaAs FETs where p-regions are required for high-frequency performance.
- 社団法人電子情報通信学会の論文
- 2007-08-01
著者
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Nishihori Kazuya
Department Of Physical Electronics Tokyo Institute Of Technology:(present Office)toshiba Corporation
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Miyamoto Yasuyuki
Department Of Electrical And Electronic Engineering Tokyo Institute Of Technology
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Miyamoto Yasuyuki
Department Of Electrical And Electronic Engineering
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