ALPHA HiTech Underfills are dispensed along edges of BGA, CSP, or flip chip devices, flowing to perfectly fill the device footprint. The one-component, halogen-free epoxies provide superior drop-shock, impact bend, and thermal cycle test performance for the most demanding component designs.
Through the selection of products, and their ability to balance viscosity, preheat, reworkability, and mechanical strength properties, users can perfectly match an ALPHA HiTech Underfill with their specific device needs, optimizing high throughput assembly.
ALPHA HiTech CU11-3127, a product with high filler content, is available to provide better mechanical strength for CSP and Flip Chip packages. ALPHA HiTech CU11-3127 provides full bottom component coverage at room temperature. A higher preheat temperature up < 80 °C may be applied to the substrate for a faster underfill flow rate.
ALPHA HiTech CU13-3150 does not contain any fillers. Its low viscosity property is excellent for BGA application, thus no preheat is required during the dispensing process. ALPHA HiTech CU13-3150 is a reworkable product option.
ALPHA HiTech SMD Adhesives are one component, intermediate temperature, fast heat curable surface mount products. They are designed to hold chip components in place during the wave soldering process. Each product is formulated to optimally be used for either dispensing or printing applications.
ALPHA HiTech CU31-2030 is a one-component capillary underfill designed for the protection of assembled chip packages onto printed circuit boards. It is a low viscosity underfill which enables fast and efficient flow properties. In addition, it has a high Tg and low modulus which results in excellent reliability performance. ALPHA HiTech CU31-2030 is suitable for assembling BGA, CSP and Flip Chip devices.