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Trends in tantalum capacitor business continue to see an increase in molded chips and a decrease in both coated and through hole technology.
Surface mount capacitors are subject to lead-free soldering conditions and as such the mold compounds used should provide ever higher levels of MSL performance.
The primary elements used for surface mount capacitors are tantalum and niobium. Each has there pros and cons. Though tantalum has the highest capacitance density, it will burn on failure, whereas niobium doesn't. Niobium is also considerably less expensive and more readily available, but can never match the capacitance density offered by tantalum.
Key Application Considerations:
- Made using tantalum or niobium
- Very price sensitive components
- Tantalum capacitors will burn on failure
Key Material Properties:
- Fast cure for high throughput
- New materials are developed without halogens
- CTE should be between 20-22ppm