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Meeting the needs of advanced NBTI testing

100 µs timing-on-the-fly NBTI

using SMUs

The B1500A can also perform

timing-on-the-fly NBTI measure-

ment at the rate of 100 µs per

point using only SMUs. This NBTI

solution, which is provided as

part of the standard EasyEX-

PERT application tests, provides

unmatched measurement speed

and accuracy. It allows you to

obtain accurate NBTI data on

devices that do not require the

ultra-fast measurement capabili-

ties of the B1500A’s WGFMU

module

A 1

μμ

μs ultra-fast NBTI solution

Negative bias temperature insta-

bility (NBTI) testing is very

challenging, since the transistors

can recover within a few micro-

seconds after removal of the

stress condition. The WGFMU

enables ultra-fast NBTI measure-

ments starting within 1 µs after

stress removal. It can also

perform fast sweep measure-

ments, creating a 10-point IV

curve in 100 µs. The integrated

all-in-one architecture smoothly

transitions between stress and

measurement without any

glitches. This protects the DUT

from damage and ensures that

the measurement data taken is

accurate.

WGFMU supports both DC and

AC stress

Many NBTI studies show that the

measured threshold-voltage shift

depends strongly on the type of

applied stress. Variations in the

applied stress affect the magni-

tude of the threshold-voltage

degradation which, in turn, im-

pacts the device lifetime estimates.

Accordingly, accurate life-time

estimation requires the measure-

ment of not only DC stress but

also various types of AC stress.

Agilent’s SMU-based timing-on-the-fly NBTI solution maintains bias between

the stress and measure transitions to prevent device relaxation.

The WGFMU can perform complex DC/AC

stressing and transition between stress and

measurement without creating any glitches.

The WGFMU module can make

a 10 point IV sweep in 100 µs,

which captures Vth degradation

characteristics before the tran-

sistor can recover from the

applied stress.

IV Curve

Stress

IV Sweep

100

μμ

μs

Measure Id

1 2 ... 11 12 13 14 15 16 17 18 19 20

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