Indium Corporation will feature its new combined flip-chip and ball-attach flux, designed to provide a simple solution to SiP and flip-chip BGA assembly, at IEEE EPTC Singapore 2019, December 4-6, in Singapore.
WS-446HF is a water-soluble, halogen-free flux with an activator system powerful enough to promote good wetting on the most demanding surfaces, including solder-on-pad (SoP), Cu-OSP, ENIG, and surfaces used in embedded trace substrate (ETS), and flip-chip on leadframe (FCOL) .
WS-446HF provides:
- An activator chemistry powerful enough to deal with a variety of metallizations, yet cleans away completely to eliminate electrical failures such as dendrites. This is critical for fine-pitch flip-chip applications
- Tackiness suitable for flipchip and BGA assembly
- BGA: holding 0.15–0.5mm diameter solder spheres during reflow, eliminating missing balls
- Flip-chip: Retaining 5×5–15x15mm die in place during reflow, reducing die misalignment and die tilt
- Consistent deposition in pin transfer, printing, and dipping processes, ensuring consistent joint quality and improving production yields
- Elimination of multiple fluxing steps, especially in ball-attach assembly, enabling a single-step ball-attach process thus removing the warpage-inducing effects of prefluxing
- Good cleanability with room temperature DI water (20-35°C), avoiding the formation of white residue
Indium Corporation es uno de los principales fabricantes y proveedores de materiales para los mercados mundiales de la electrónica, los semiconductores, las películas finas y la gestión térmica. Sus productos incluyen soldaduras y fundentes, soldaduras fuertes, materiales de interfaz térmica, cátodos para sputtering, metales y compuestos inorgánicos de indio, galio, germanio y estaño, y NanoFoil®. Fundada en 1934, la empresa cuenta con asistencia técnica mundial y fábricas en China, India, Malasia, Singapur, Corea del Sur, Reino Unido y Estados Unidos.
For more information about Indium Corporation, visit indiumstg.wpenginepowered.com or email [email protected]. You can also follow our experts, From One Engineer To Another® (#FOETA), at www.facebook.com/indium or @IndiumCorp.
