As the energy transition continues to accelerate, German gas mixing specialist Witt Gas (Witt) is preparing to further develop its gas mixing technologies. 

The company – regarded as a specialist in hydrogen applications – manufactures gas mixers designed for hydrogen mixtures to be used across a range of processes. 

One such process that requires a hydrogen mixture is inductive soldering – or copper-wire bonding – which is involved in the manufacture of semiconductors.

Hydrogen gas mixer.

Hydrogen gas mixer.

Under a protective atmosphere, usually consisting of nitrogen and hydrogen, the copper wire is melted and bonded to the semiconductor wafer. 

In addition to providing protective gas for this process in the form of nitrogen and hydrogen, other gas mixtures such as carbon dioxide (CO2), argon, or helium can be used. 

The reliability of gas supply can be increased with a parallel design comprising of two gas mixing units with automatic changeover. 

Witt’s components – including pressure regulators, mixing valves, flame arresters, gas non-return valves, flow regulars, pressure switches or piping – are cleaned in accordance with regulations EIGA 13/20 and CGA G-4.4: Oxygen Pipelines and Piping Systems or EIGA 33/18 and CGA G-4.1: Cleaning of Equipment for Oxygen Service. 

In addition to being compatible with its gas analysers or gas filters, the company’s gas mixers can be used for both low and high-capacity ranges and for two or more gases