Agilent Technologies Agilent E5250A manual Applies stress and characterizes the parameters

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	Stress time	Cumulative	Stress	Stress time	Cumulative
cycle		stress time	cycle		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

Agilent E5250A User’s Guide, Edition 9 9-21