Application of Caustic Foci to Measure Small Dimensional Changes Accompanying Water Uptake by Polymer Coatings on the Chip-on-board (COB)
| Autor: | Z. R. Xu, K. H. G. Ashbee |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Materials science
Sealant Surfaces and Interfaces General Chemistry Chip Surfaces Coatings and Films Mechanics of Materials visual_art Distortion Electronic component Water uptake Materials Chemistry visual_art.visual_art_medium medicine Caustic (optics) Swelling medicine.symptom Composite material Shrinkage |
| Zdroj: | The Journal of Adhesion. 35:135-161 |
| ISSN: | 1545-5823 0021-8464 |
| DOI: | 10.1080/00218469108030442 |
| Popis: | As deposited, the protective silicone coating applied to electronic packages, such as the chip-on-board (COB), has smoothly curved edges that can be sufficiently reflective to generate optical caustic foci. The geometry of caustic foci is extremely sensitive to the topography of the reflecting surface. We have exploited this fact to develop a new method for monitoring surface distortion during swelling (or shrinkage) associated with the presence of diffused water within the material of the sealant. |
| Databáze: | OpenAIRE |
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