一种复合终端逆阻IGBT数值仿真分析

绝缘栅双极型晶体管（insulated gate bipolar transistor，IGBT）本身不具有反向阻断能力，因此在电路中通常与二极管组合使用。为降低使用成本，减小寄生电感，续流二极管与IGBT通过工艺集成在同一芯片上，由此提出了具有反向阻断能力的逆阻型IGBT。针对常规逆阻IGBT终端面积大的问题，提出了一种改进型复合终端结构，采用双掺杂场限环，在P型场限环旁边引入N型轻掺杂区。改进结构减小了耗尽区横向扩展速率，增强器件可靠性，节省终端面积占用并提高了终端效率。

Modeling of Power Generation Structure with Diversification Level and Emission Constraints Considered

Given that advanced technologies for both fossil and non-fossil fuels power generation have gradually entered a new development stage where the two can compete against each other in the market, studying the structural evolution of the power generation structure and its influences on the total energy consumption and emission has become a priority in the field of energy system modeling, particularly for a transitional economy like China. In this paper an optimization tool is developed and implemented to simulate the optimal portfolio of power generation technologies with the constraints on technological, economical, and environmental performance. Various scenarios are designed and compared to illustrate the interactions among cost, diversity, and emissions. Results can make a reference to the government policy-making.