In opposite to the Electrical Fusion, the Flame Fusion is not using an electric current, but is using am H2/O2-Flame to heat up and melt the material. Heraeus chemist Richard Küch was the first person to ever melt quartz over 100 years ago, he used a flame fusion process for his pioneer endeavor.
Heraeus Quarzglas is the only material manufacturer who can produce fused quartz in a continuous flame fusion process, combining the benefits of a continuous process with the properties of flame fused quartz.
The extreme low bubble content makes Heraeus flame fused quartz the best choice for plasma etch applications.
Heraeus Quarzglas also offers flame fused material in very large size ingots in the range of 1.5m x 1.2m and larger.