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First 12 Wafers – Different

Material Name: Wafer
Record No.: 80
Primary Chemical Element in Material: No data
Sample Type: Wafer
Uses: Etching
Etchant Name: None
Etching Method: Etching
Etchant (Electrolyte) Composition: No data
Procedure (Condition): No data
Note: No data
Reference: Website https://www.microtronic.com/defect-library/first-12-wafers-different/, Image and text by courtesy of Microtronic company, 2020.


Figure 1: Occasionally half of the semiconductor wafers in a lot that are inspected are a different color. Note in the example above, the semiconductor wafers in slot 1-12 were flagged as being different from the remaining semiconductors wafers.