Heraeus Quarzschmelze Gmbh

Heinrich Mohn

Heinz Herzog

Karl A Schulke

Karl-Albert Schulke

Holger Grzybowski

Alfons Gutermann

An epitaxy bell of transparent fused silica is provided with a flanged, thick-walled tubular piece of transparent fused silica on the side on which a process gas is exhausted. The wall thickness of the constricted portion of the bell is increased toward the transparent fused silica tubular piece.

Transparent fused silica bell for purposes relating to semiconductor

A method is described for the production of porous bodies from vitreous silica without the use of tools. Vitreous silica wool and/or threads are wound in layers on a form. After the coil has attained a certain minimum thickness, the threads of each succeeding layer are permanently bonded by heating the threads of the preceding layer at the points where the threads cross. The form is removed, and then the threads on the inside of the body are bonded together. The bodies are used for the production of high-purity blocks of silicon for solar cells.

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Gelnhausen, Germany

Heinrich Mohn