The Formic Acid Precision Bubbler Cabinet provides consistent vapor concentration within ±0.5%, ensuring a stable process environment. Concentration is based on nitrogen saturation behavior modeled by the Antoine equation and can be adjusted via bubbler temperature and nitrogen flow.
An auto-refill system maintains bubbler volume above minimum levels at all times.

The proprietary Heller Formic Gate significantly reduces gas consumption. This double-door configuration at the oven entrance and exit ensures only one door opens at a time, isolating the process chamber and reducing nitrogen and formic usage during continuous production.

✔ High-volume manufacturing capability – Formic reflow ovens support true in-line continuous processing, similar to standard reflow equipment, achieving maximum throughput over batch-type systems.
✔ Low consumable usage – A unique Formic Gate system acts as a double-door structure at the oven entrance and exit, minimizing nitrogen and formic acid consumption while maintaining strong productivity.
✔ Vacuum process option – To support growing demand for void-free interconnects, an optional vacuum chamber can be integrated into the reflow zone.
✔ Advanced safety integration – Systems comply fully with SEMI S2/S8 requirements, including advanced monitoring and abatement features.
✔ Cleanroom compatibility up to Class 100 – Multiple configurations support cleanroom integration up to Class 100.
✔ Real-time formic acid tracking – Continuous monitoring and recording ensure reliable and consistent process control.
✔ Industry leadership – Heller Industries pioneered flux-free formic reflow and introduced the first continuous in-line formic reflow systems to the market.