November 4, 2026 ALPHA HI-FILL 3100 Underfill Epoxy
ALPHA HI-FILL 3100 is a high-performance one-component underfill epoxy designed to improve the attachment strength of BGA components and protect solder joints during severe mechanical stress, such as drop impact and board bending. Manufactured by MacDermid Alpha, this advanced liquid formulation guarantees exceptional mechanical reliability in demanding microelectronic assemblies.
Key Features of ALPHA HI-FILL 3100
Engineered for high-reliability semiconductor packaging and SMT board assembly, this capillary underfill provides outstanding thermal performance and structural reinforcement. Key engineering benefits of ALPHA HI-FILL 3100 include:
- High Glass Transition Temperature (High Tg): Offers superior thermal stability and reliability across broad operating temperature ranges.
- Low Coefficient of Thermal Expansion (Low CTE): Minimizes thermal expansion mismatch between the silicon die, BGA substrate, and PCB board.
- Excellent Flow-Speed: Features optimized capillary flow behavior, filling small gaps under dense BGA packages efficiently.
- Halogen-Free & One-Component: Pre-mixed single-component system strictly complying with global halogen-free environmental standards.
Application Guidelines and Thermal Curing
Following proper storage, thawing, substrate preheating, and thermal cure profiles ensures optimal capillary flow and full crosslinking of ALPHA HI-FILL 3100:
- Storage & Handling: Store at -20°C to maintain stability for up to 6 months. Pot life at 25°C room temperature is 3 days. Allow syringes to thaw completely to room temperature before removing the cap.
- Preheat & Dispensing: Preheating the PCB substrate to 50–100°C significantly enhances capillary flow speed during underfill dispensing. Available in specified syringes or bulk containers per customer request.
- Recommended Cure Profiles: Achieve full property development in a convection oven by curing for >20 minutes at 130°C, or >7 minutes at 150°C.
Technical Specifications
Below is the detailed technical specification summary for process engineering reference:
| Property | Specification / Requirement |
|---|---|
| Chemical Type | Epoxy System |
| Appearance | Black liquid |
| Curing Method | Heat cure (Convection Oven) |
| Typical Applications | BGA Underfill, mechanical joint protection |
| Viscosity (RVDV-II Brookfield #5, 20rpm, @25 °C) | 3,000 to 8,000 cps |
| Specific Gravity | 1.35 to 1.45 |
| Pot Life (@ 25 °C) | 3 days |
| Shelf Life (@ -20 °C) | 6 months |
| Preheat Temperature Condition | 50 to 100 °C |
| Recommended Cure Options (Convection Oven) | >20 minutes @ 130 °C / >7 minutes @ 150 °C |
| Key Performance Attributes | High Tg, Low CTE, Excellent Flow-Speed, Halogen-Free |
Conclusion
Utilizing ALPHA HI-FILL 3100 guarantees high Tg performance and low thermal expansion to protect BGA components against mechanical drop and bending stress. For technical support, equipment integration, or commercial quotes, please visit Contact – LORIOT INDUSTRIAL.
