HCI / NBTI - Celestry Design Technologies, Inc.

RelXpert
3
Three Easy Steps to Faster Designs
Step 1: Degradation Calculation
How it works:
1. Calculate actual current waveforms from real circuit operating conditions.
2. Use these waveforms to calculate the "age" for each transistor. Lifetimes and percent
degradation can then be made (see figure below).
"We selected Celestry because of their
experience in reliability analysis and
unique 'hands-on' knowledge of deep
submicron silicon issues. Celestry's
products will aide TI in more aggressive
design shrinks and in reducing wasted
performance and silicon lost by overly
pessimistic design guardbands,"
-- TI
Lifetime (Years)
1000
100
10
Crosstalk Coupling on HC Degradation
1
0 0.1 0.2 0.3 0.4
Ccoup/Ctotal
◆ Lifetime drops 3 orders of magnitude as
coupling increased from 0 to 35%
◆ Most difficult/dangerous AC HCI phenomenon
"For our high performance designs,
HCI is an important issue. Celestry's
products make it easy for our designers
to assess and prevent circuit-level
reliability issues caused by HCI effects.
-- STMicroelectronics
NBTI Vg Dependency for Long Channel Device
log DeltaVt/Vt (%)
Delta Vt/Vt vs Time
(W/L=10u/10u, T=125C, Vd=0)
100.00%
10.00%
1.00% 1.00 10.00 100.00 1000.00
log Time (min)
Vg=1.45
Vg=1.65
Vg=1.85
The engineering efforts of Celestry and
TSMC have enhanced Celestry's hot-carrier
analysis software,"... "Offering designers a
powerful tool for digital, mixed-signal and
analog designs, particularly those using
overdrive voltages. It also gives designers a
higher level of assurance in the performance
and reliability of their designs."
-- TSMC
HC Effects & NBTI in Circuit Operation
Vit(t)
Vout(t)