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Critical doping requirements for ≤ 65 nm device manufacturing

机译:≤65 nm器件制造的关键掺杂要求

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摘要

Ion implantation has long been considered a commodity in semiconductor device manufacturing. Historically, precision of beam incident angle has not been a critical requirement. However, with the miniaturization of semiconductor devices, the traditional tolerance to errors in beam incident angle is becoming less acceptable. This places significant constraints on the ability of implanters to meet the precision requirements of dopant placement necessary to sustain device performance. In this paper, we will discuss the effect of beam incident angle in CMOS doping applications. Device parametric performance was investigated using TCAD simulations. With implant energies for source drain extension (SDE) reaching sub keV levels, these implants are typically performed in decel mode. Depending on the design of the implanter, use of decel mode can introduce a finite amount of energy contamination. Effects of this energy contamination on device performance were also investigated using TCAD simulations.
机译:长期以来,离子注入一直被认为是半导体器件制造中的一种商品。从历史上看,光束入射角的精度并不是关键要求。然而,随着半导体器件的小型化,对光束入射角误差的传统容忍度变得越来越难以接受。这对注入机满足维持器件性能所必需的掺杂剂放置的精度要求的能力提出了重大限制。在本文中,我们将讨论光束入射角在CMOS掺杂应用中的影响。使用TCAD仿真研究了设备参数性能。随着用于源极漏极扩展(SDE)的注入能量达到亚keV水平,这些注入通常以减速模式执行。根据注入机的设计,使用减速模式可能会引入有限量的能量污染。还使用TCAD仿真研究了这种能量污染对设备性能的影响。

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