| The mottled, colorful area is the natural appearance of a thin film of liquid crystal viewed under cross polarized conditions. This film was applied by wetting the surface of the IC with K18R. The pulsing dark spot indicates where 1 to 2 mW of power from abnormal leakage heats the defect area above 29° C. K18R loses its unique optical characteristics at temperatures above 29 degrees, so the hot area appears dark. (The damage to this IC was caused by ESD stress.) |
|
| Liquid Crystal Hot Spot Detection
Equipment Considerations | |
| For questions or comments about the technical content of this site, Email: davidburgess@AcceleratedAnalysis.com |
