Heraeus Quarzschmelze Gmbh

Other

Shin-Etsu Quartz Products Co., Ltd.

Heraeus Quarzglas Gmbh

Heinz Herzog

Helmut Leber

Poul E Breidenbach

Heinrich Mohn

Jurgen Pottker

Karl A Schulke

Karl-Albert Schulke

Alfons Gutermann

Holger Grzybowski

A preferred embodiment of the present invention comprises a vitreous quartz pipe or container having a connector including a flange formed from at least one strip or rod-shaped piece of transparent quartz glass which is wound circumferentially around either an inner or outer surface of a portion of the pipe or container and secured to the pipe or container to thereby form a closed-ring flange. The portion of the pipe or container having the attached flange may be an open end of the pipe or container or may be a wall portion where a connector for mounting to fixtures or other fittings may be desired. This type of strip or rod-shaped piece of quartz glass can be made via a conventional pulling technique such that a strip or rod having the appropriate uniform cross-sectional shape is obtained. The prepared strips or rod-shaped pieces are then easily cut with a saw device to appropriate lengths. According to a preferred method of the present invention, a small portion of a strip or rod-shaped piece of transparent quartz glass is made pliable with the direct application of heat. As the portion of the strip or rod-shaped piece of quartz glass becomes pliable, the strip or rod-shaped piece of quartz glass is made to conform to the curvature of the underlying inner or outer pipe or container surface. At the same time, heat is applied to the pipe or container surface and the facing underside of the strip or rod-shaped piece of quartz glass and light pressure forms a secure weld between the pipe or container surface and the strip or rod-shaped piece of quartz glass. To achieve a flange having a radial depth greater than the corresponding dimensional thickness of a single prepared strip or rod-shaped piece of quartz glass, multiple layers of the strip or rod-shaped piece of quartz glass may be applied one upon the other extending radially from the surface of the pipe or container.

Methods and apparatus for providing quartz glass connectors

A preferred embodiment of the present invention comprises a vitreous quartz pipe or container having a connector including a flange formed from at least one strip or rod-shaped piece of transparent quartz glass which is wound circumferentially around either an inner or outer surface of a portion of the pipe or container and secured to the pipe or container to thereby form a closed-ring flange. The portion of the pipe or container having the attached flange may be an open end of the pipe or container or may be a wall portion where a connector for mounting to fixtures or other fittings may be desired. This type of strip or rod-shaped piece of quartz glass can be made via a conventional pulling technique such that a strip or rod having the appropriate uniform cross-sectional shape is obtained. The prepared strips or rod-shaped pieces are then easily cut with a saw device to appropriate lengths. According to a preferred method of the present invention, a small portion of a strip or rod-shaped piece of transparent quartz glass is made pliable with the direct application of heat. As the portion of the strip or rod-shaped piece of quartz glass becomes pliable, the strip or rod-shaped piece of quartz glass is made to conform to the curvature of the underlying inner or outer pipe or container surface.

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.

Wound and sintered vitreous silica article and method of making

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Karlstein, Germany

Heinz Herzog