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Type of Defect: |
Void (2/2) |
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Description: |
Hole in the PC substrate caused by Hydrolysis (as time elapse) |
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Observation Method: |
Visible with microscope |
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Recommendation Upon Observation: |
Better visibility under polarized light / visible as bright speck |
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Other Evaluation Method: |
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Cause |
Countermeasure |
| Hydrolysis of PC Caused by Humidity |
Check airborne dirt, alkalic agents from air dryer of material drying system |
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Hydrolysis of PC Caused by Humidity |
Check environment of depository for disc products (room temperature and humidity) |
