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ABSTRACT
Device scaling has enabled continuous performance increase of integrated circuits. However, severe reliability and yield concerns are arising against the background of nanotechnology. Tradition-ally, most causes and countermeasures were solely considered manufacturing issues, but lately, we have seen a shift towards op-erational reliability issues. Though, besides intense research on soft-errors and system-level approaches very little effort is put into low-level design solutions in order to enhance lifetime reliability. Hence, we demonstrate that redundant transistor insertion does im-prove system reliability significantly as regards Time-Dependent Dielectric Breakdown (TDDB). Furthermore, we introduce an al-gorithm which identifies the transistors being most vulnerable to TDDB. Subsequently, redundant transistors (called shadow transis-tors) are inserted at the previously identified instances. Lastly, we argue for applying high threshold voltage devices for the redundant transistors. Finally, we present results for a set of benchmark cir-cuits and prove the combined approach successful. The enhanced designs were on average 41.8% more reliable compared to the ini-tial designs in respect of TDDB at the price of moderately in-creased power consumption and delay.
REFERENCES
Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.
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INDEX TERMS
Primary Classification:
B.
Hardware
B.8
Performance and Reliability
B.8.1
Reliability, Testing, and Fault-Tolerance
Additional Classification:
B.
Hardware
B.8
Performance and Reliability
B.8.2
Performance Analysis and Design Aids
C.
Computer Systems Organization
C.4
PERFORMANCE OF SYSTEMS
Subjects:
Fault tolerance;
Performance attributes;
Design studies;
Reliability, availability, and serviceability
General Terms:
Algorithms,
Design,
Performance,
Reliability
Keywords:
gate oxide breakdown,
logic design,
modeling,
nanotechnology,
organic computing,
redundancy,
transistor
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