The Hidden Cost of Flux Residue: How FC610 Improves BGA Yield

Flux residue is more than a cosmetic issue — it directly impacts yield. Residues trapped between solder balls can cause non‑wetting, bridging, or long‑term corrosion. In high‑volume EMS and OSAT factories, even a 0.5% yield loss translates into significant cost.

Common failure modes include:

• Non‑wetting due to organic residue
• Ionic contamination causing leakage
• Dendritic growth under humidity
• CAF formation in high‑density substrates

FC610 reduces these risks by ensuring complete removal of both organic and ionic contaminants. Its heated DI‑water spray breaks down flux residues, while the rinse stage eliminates dissolved ions. The air‑knife and hot‑air drying stages prevent watermarks and moisture entrapment.

Factories using FC610 often report lower rework rates, more stable yields, and improved long‑term reliability.

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