Efficient methodologies for 3-D TCAD modeling of emerging devices and circuits

Ajay N. Bhoj, Rajiv V. Joshi, Niraj Kumar Jha

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Over the past decade, 3-D process simulation, which is central to the 3-D Technology Computer-Aided Design (3-D TCAD) approach, has severely limited the scope and applicability of TCAD to circuits with a small number of field-effect transistors, owing to its prohibitively high computational costs for large layouts. Due to rapidly changing process recipes and shorter production cycles in the industry, design-time optimization and iterative layout-3-D TCAD exploration for yield-critical or yield-characterizing circuits, such as static random-access memories (SRAMs), ring oscillators, and others, is currently impossible in a practical time frame. In this paper, we architect a novel layout/process/device-independent TCAD methodology in the Sentaurus tool suite to overcome the process simulation barrier for accurate 3-D TCAD structure generation. We adopt an automated structure synthesis (SS) approach, thereby bypassing the need for repetitive 3-D process simulations for different layouts or different versions of the same layout. Results for 32-nm bulk process simulations versus SS and 32-nm silicon-on-insulator (SOI) hardware measurements versus corresponding synthesized structures indicate that the method is an excellent substitute to 3-D process simulation of large layouts, with extremely favorable time and memory scaling behavior. Finally, the robustness and scalability of the proposed abstractions are highlighted through the synthesis of 22-nm SOI 6T FinFET SRAMs and ring oscillator structures.

Original languageEnglish (US)
Article number6387694
Pages (from-to)47-58
Number of pages12
JournalIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Volume32
Issue number1
DOIs
StatePublished - Jan 10 2013

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering

Keywords

  • Capacitance extraction
  • device simulation
  • process simulation
  • structure synthesis
  • technology CAD

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