# wafer-diagnostic-tools

- It is a tool that helps check wafers condition before it to be microchips.

- Alignment, Edge Leveling, Particle check

0. Main

- shows 3 test options

1. Alignment

- check if a wafer is located at the expected position
- by using TIS 1,2,3,4 sensor, it can figure out wafers position
- possible results : 
    - rotate clock wise, count clock wise 
    - shift E,S,S,N
- How to read result 
     - blue line : defalt distance between each TIS and align mark
     - red line : real reading value

2. Leveling

- check wafer is parlelly located
- normal value is 0

3. Particle

- wafers always should be super clean, check if wafers are contaminated
- color show how wafers contaminated