1. Testing Pixelated Polarizers
Moxtek Clinic Team
Members: James J. Blue, Andrew Ostler, Eric Aui, Michael Rowley
Advisor: Dr. Steve Blair
University of Utah
Electrical Engineering
4/26/10

2. Overview What is a Polarizer? What is a Pixelated Polarizer? Defects
Current Testing Process
Proposed Solution
Conclusion
[1]

3. What is a Polarizer?
[2]

4. Without Polarizer 
With Polarizer 
[3]

5. What is a Pixelated Polarizer?
Array of polarizers, each with a different orientation
Used in
Imaging Polarimetry
Polarization Difference Imaging 3D
Display
Image Capture
Biometric Facial Recognition
Biological Analysis
Military
Remot Sensing
Target Discrimination
[1]

6. Target Discrimination
[1]

7. Defects
Newton Rings
Shadows
Repetitive!!
Preventable
Cleanliness
[5]

8. Current Testing Process
Take wafer from production line
Break it into small pieces
Analyze pieces under microscope
Takes about 4-6 hours
Wafers still being produced during this time
[4]

9. Proposed Solution Polarized Laser Scan
Faults occur when an incorrect amount of light is filtered
X-Y Coordinate System
Zoom in on defects
Capture and display image
Employee analyzes image with location of defect on wafer known

10. Conclusion Polarizers filter different polarizations of light
Pixelated polarizer is an array of polarizers with different orientations
Defects
Current testing process slow and tedious
Two step solution
Saves a lot of time and money!!

11. Contact Information
James J. Blue
(801)
References
[1]
[2]
[3]
[4]
[5]