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Characterization and modeling of 28-nm FDSOI CMOS technology down to cryogenic temperatures

机译:低温下28 nm FDSOI CMOS技术的表征和建模

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This paper presents an extensive characterization and modeling of a commercial 28-nm FDSOI CMOS process operating down to cryogenic temperatures. The important cryogenic phenomena influencing this technology are discussed. The low-temperature transfer characteristics including body-biasing are modeled over a wide temperature range (room temperature down to 4.2 K) using the design-oriented simplified-EKV model. The trends of the free-carrier mobilities versus temperature in long and short-narrow devices are extracted from dc measurements down to 1.4 K and 4.2 K respectively, using a recently-proposed method based on the output conductance. A cryogenic-temperature-induced mobility degradation is observed on long pMOS, leading to a maximum hole mobility around 77 K. This work sets the stage for preparing industrial design kits with physics-based cryogenic compact models, a prerequisite for the successful co-integration of FDSOI CMOS circuits with silicon qubits operating at deep-cryogenic temperatures.
机译:本文介绍了在低温条件下运行的商用28nm FDSOI CMOS工艺的广泛表征和建模。讨论了影响该技术的重要低温现象。使用面向设计的简化EKV模型,可以在很宽的温度范围(室温低至4.2 K)中对包括偏心的低温传递特性进行建模。使用最近建议的基于输出电导的方法,分别从低至1.4 K和4.2 K的直流测量中提取了长窄器件和短窄器件中自由载流子迁移率随温度变化的趋势。在长pMOS上观察到低温温度引起的迁移率降低,从而导致最大空穴迁移率在77 K附近。这项工作为使用基于物理的低温紧凑模型制备工业设计套件奠定了基础,这是成功进行协整的前提硅量子位的FDSOI CMOS电路的工作原理是深低温。

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