Agilent Technologies Agilent E5250A - Manual (Page 277)

Agilent E5250A User’s Guide, Edition 11 9-21
Executing Sample Programs
HCI Measurement Program
Step 5. Applies stress and characterizes the parameters
This step performs the following:
1. Applies the stress, Vdstr and Vgstr, to the valid devices.
Before running the SP_MUX_M program, you must determine the Vdstr (drain
stress voltage) by Id-Vds measurement (using setup file IDVD.MES), then edit
the SP_MUX_M program to input value of Vdstr. Refer to “Executing the
Program” on page 9-27.
2. Performs the interim characterization. This sets up the 4155/4156 by using the
PARAM.MES setup file, then measures the parameters (Idlin, Gmmax, Vtext
and Vtci) for each device.
3. Judges whether to terminate the stress/interim characterization cycle. This cycle
is terminated when total stress time reaches 100,000 sec or when there is no
device satisfies all of the following conditions:
• Idlin value is within ±10 % of initial value.
• Gmmax value is within ±10 % of initial value.
• Vtext value is within ±20 mV of initial value.
• Vtci value is within ±20 mV of initial value.
If none of these termination conditions has occurred, stress time (duration) is
increased, and these 3 steps are repeated. The default cumulative stress times are
defined in the program as follows. To change these cumulative stress times, refer
to “Modifying the Program” on page 9-35.
Stress
cycle
Stress time
Cumulative
stress time
Stress
cycle
Stress time
Cumulative
stress time
1 10 sec 10 sec 8 1000 sec 2000 sec
2 10 sec 20 sec 9 3000 sec 5000 sec
3 30 sec 50 sec 10 5000 sec 10000 sec
4 50 sec 100 sec 11 10000 sec 20000 sec
5 100 sec 200 sec 12 30000 sec 50000 sec
6 300 sec 500 sec 13 50000 sec 100000 sec
7 500 sec 1000 sec