抗輻照SOI MOSFET模型研究
[Abstract]:Compared with traditional bulk silicon, SOI materials have high integration, strong radiation resistance, low power consumption, high speed, suitable for small size devices, which can overcome the shortage of bulk silicon materials and maximize the potential of silicon integrated circuits. Deep submicron devices, three-dimensional integrated circuits and high-temperature electronics have been widely used. SOI CMOS devices have been widely used in aerospace systems, nuclear power equipment electronics, military engineering and other special fields. The radiation effect caused by radiation environment will result in the degradation of the performance of electronic components and integrated circuits, the occurrence of logic errors or permanent damage, which will seriously affect the stability and reliability of electronic systems, and even the complete failure. Therefore, how to improve the radiation resistance of SOI devices has become the focus of research at home and abroad in recent years. In this paper, the physical mechanism, model and model parameters of SOI CMOS devices in irradiated environment are studied, the degradation of total dose irradiation effect to the performance of microelectronic devices is analyzed, and the anti-irradiation model of SOI CMOS is studied. The main work of this paper is as follows: 1. The radiation environment and the basic physical properties of SOI MOSFET devices are described in detail. By analyzing the total dose radiation effect of SOI MOSFET devices and the existing anti-irradiation techniques, The degradation mechanism of electrical characteristics of SOI CMOS devices such as threshold voltage drift, sub-threshold slope change (leakage current increase) and so on are discussed in detail. In order to lay a foundation for the subsequent development of the total dose radiation (SOI MOSFET) structure, the characteristics of total dose radiation resistance of SOI MOSFET devices are described in detail. Based on the device model of circuit simulation and familiar with the modeling process of BiCMOS devices, the establishment of SOI MOSFET anti-irradiation model is completed successfully. It provides a bridge for the connection between the device anti-irradiation process and the circuit design. In this paper, the anti-irradiation characteristics of SOI devices are deeply studied, and on the basis of the Verilog-A model of BSIM3SOI, the extraction and verification of the parameters of the 0.8m SOI CMOS SPICE model are successfully completed, and the anti-irradiation reinforcement model is proposed. It provides more accurate model simulation for circuit design and improves the success rate of circuit radiation reinforcement design.
【學(xué)位授予單位】:杭州電子科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TN386
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