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Development of Electron-Beam Lithography Process Simulation Tool of the T-shaped Gate Formation for the Manufacturing and Development of the Millimeter-wave HEMT Devices  

손명식 (동국대학교 밀리미터파신기술연구센터)
김성찬 (동국대학교 밀리미터파신기술연구센)
신동훈 (동국대학교 밀리미터파신기술연구센)
이진구 (동국대학교 밀리미터파신기술연구센)
황호정 (중앙대학교 전자전기공학부)
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Abstract
A computationally efficient and accurate Monte Carlo (MC) simulator of electron beam lithography process has been developed for sub-0.l${\mu}{\textrm}{m}$ T-shaped gate formation in the HEMT devices for millimeter-wave frequencies. For the exposure process by electron to we newly and efficiently modeled the inner-shell electron scattering and its discrete energy loss with an incident electron for multi-layer resists and heterogeneous multi-layer targets in the MC simulation. In order to form the T-gate shape in resist layers, we usually use the different developer for each resist layer to obtain good reproducibility in the fabrication of HEMT devices. To model accurately the real fabrication process of electron beam lithography, we have applied the different developers in trilayer resist system By using this model we have simulated and analyzed 0.l${\mu}{\textrm}{m}$ T-gate fabrication process in the HEMT devices, and showed our simulation results with the SEM observations of the T-shaped gate process.
Keywords
Electron Beam Lithography; Monte Carlo Simulation; HEMT; Millimeter wave; T-shaped Gate;
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