Boule

Grade A

Grade B


Ingot


Wafer


Plano Optics


Others


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Boule
 
 
Grade
Grade Definition
A
 > 90% usage in above 100% volume ( > 75% can be considered case by case )
B  > 50% usage in above 100% volume
Remarks:
1. Grades are definied according to MECO's Grading system.
2. 100% volume is defined as shown in the figure above.