# Cmos Tech

## Cmos Tech

• Submitted By: 838edmond
• Date Submitted: 11/18/2008 4:47 AM
• Category: Technology
• Words: 912
• Page: 4
• Views: 396

[pic]

City University of Hong Kong
Department of Electronic Engineering
EE5430
Laboratory Report

Short-Channel Effect on Threshold Voltage

1. Plot the output characteristics, i.e. Ids versus Vds as a variable.

2. Plot Ids versus Vgs, determine the threshold voltage of the transistor with Vds as a variable.

3. Repeat 1-2 for channel length L = 0.18, 0.35, 0.5, 0.8, 1.0, 1.5, 2 um

Ids versus Vds as a variable ( L=0.18um)
[pic]

Ids versus Vds as a variable ( L=0.35um)
[pic]

Ids versus Vds as a variable (L=0.5um)
[pic]

Ids versus Vds as a variable (L=0.8um)
[pic]

Ids versus Vds as a variable (L=1.0um)
[pic]

Ids versus Vds as a variable (L=1.5um)
[pic]

Ids versus Vds as a variable (L=2um)
[pic]

Ids versus Vgs as a variable (L=0.18um)
[pic]

Ids versus Vgs as a variable (L=0.35um)
[pic]

Ids versus Vgs as a variable (L=0.5um)
[pic]

Ids versus Vgs as a variable (L=0.8um)
[pic]

Ids versus Vgs as a variable (L=1.0um)
[pic]

Ids versus Vgs as a variable (L=1.5um)
[pic]

Ids versus Vgs as a variable (L=2um)
[pic]
4. Plot the threshold voltage versus L.

|Channel Length (um) |Threshold Voltage (V) |
|0.18 |0.5 |
|0.35 |0.6 |
|0.5 |0.7 |
|0.8 |0.7 |
|1.0 |0.75 |
|1.5 |0.75 |
|2 |0.75 |

[pic]

5. Determine the drain induced barrier lowering for different channel lengths using

DIBL = [pic]

|Channel Length (um)...