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Mobility error
The mobility algorithm checks whether the experimental data meet a set of requirements, with the
outcome used to validate or discard the DUT figures of merits. These requirements are essentially
conditions on the data set (number of data available), noise, feature of the transfer curves and its
first and second derivative and a classified as mandatory or desirable. Failure to fulfil a mandatory
requirement will result in a fatal error and no figures of merit will be returned for the DUT.
Conversely, a desirable requirement failure will generate a warning (non-fatal error). Both fatal and
no-fatal errors are printed on the Overview file, next to the device number. See table below for the
complete list of fatal errors.
Error Code
-5200
-5201
-5202
-5204
-5205
In case of non-fatal error, the mobility legend on the UI will show an exclamation mark and the
mobility plot background will turn into a red light if a warning message is associated to either linear
or saturation mobility warning. The mobility plot will turn dark red if both linear and saturation
mobility are accompanied with a warning.
Ossila Ltd
Description
Data In Empty: no experimental data is received
by the Mobility subroutine
Data Out Empty: the mobility algorithm does
not output any data. For example, this error can
occur if the subroutine processing the data fails
to calculate the linear fit.
Not enough data points. A minimum number of
data points are required to calculate the
mobility. For example, at least 11 data point
V
> V
are required for the linear regime
GS,i
DS
mobility subroutine to reliably compute the
mobility. If such a condition is not fulfilled,
SuperFACT will not return any figures of merit
for the DUT in linear regime. Similar condition
applies for the saturation regime subroutine.
Data not match. For Example this error can
occur if a p-type device is measured, but FET
type controls is set to n-type instead of p-type
Device behaviour unknown. This error occurs
when the TC curves and/or its first and second
derivative present a behaviour that is not
compatible with the standard FET model.
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