BROWSE

Related Researcher

Author's Photo

Kim, Youngmin
Nano-scale(system) Design & Automation Lab
Research Interests
  • Design & Technology Co-Optimization (DTCO)
  • Variability-Aware and Robust Design Methodologies
  • Design for Manufacturability/Variability (DFM/V)
  • Low-Power and High Performance Circuit Design
  • 3D IC with TSV

ITEM VIEW & DOWNLOAD

Self-compensating design for reduction of timing and leakage sensitivity to systematic pattern-dependent variation

Cited 3 times inthomson ciCited 3 times inthomson ci
Title
Self-compensating design for reduction of timing and leakage sensitivity to systematic pattern-dependent variation
Author
Gupta, PuneetKahng, Andrew B.Kim, YoungminSylvester, Dennis
Keywords
Across-chip linewidth variation (ACLV); Design for manufacturability; Focus; Leakage; Self-compensating; Systematic variation
Issue Date
2007-09
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS, v.26, no.9, pp.1614 - 1624
Abstract
Critical dimension (CD) variation caused by defocus is largely systematic with dense lines "smiling"" through focus while isolated lines frown." In this paper, we propose a new design methodology that allows explicit compensation of focus-dependent CD variation, in particular, either within a cell (self-compensated cells) or across cells in a critical path (self-compensated design). By creating iso and dense variants for each library cell, we can achieve designs that are more robust to focus variation. Optimization with a mixture of dense and iso cell variants is possible, both for area and leakage power in timing constraints (critical delay), with the latter an interesting complement to existing leakage-reduction techniques, such as dual-Vth. We implement both a heuristic and mixed-integer linear-programming (MILP) solution methods to address this optimization and experimentally compare their results. Results indicate that designing with a self-compensated cell library incurs 12% area penalty and 6% leakage increase over a baseline library while compensating for focus-dependent CD variation (i.e., the design meets timing constraints across a large range of focus variation). We observe 27% area penalty and 7% leakage increase at the worst case defocus condition using only single-pitch cells. The area penalty of circuits after using both the heuristic and MILP optimization approaches is reduced to 3% while maintaining timing. We also apply the optimization to leakage, which traditionally shows very large variability due to its exponential relationship with gate CD. We conclude that a mixed iso/dense library that is combined with a sensitivity-based optimization approach yields much better area/timing/leakage tradeoffs than using a self-compensated cell library alone. Selfcompensated designs show 25% less leakage power on average at the worst defoeus condition compared to a design employing a conventional library for the benchmarks studied.
URI
Go to Link
DOI
10.1109/TCAD.2007.895759
ISSN
0278-0070
Appears in Collections:
EE_Journal Papers
Files in This Item:
2-s2.0-34548212402.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU