Agilent Technologies Agilent E5250A User 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