Schott Ag

Schott Glas

Schott Glaswerke

Ulrich Fotheringham

Bernd Hoppe

Hauke Esemann

Joseph S Hayden

Edgar Pawlowski

Falk Gabel

Michael Kluge

Holger Wegener

Ulf Dahlmann

Ralf Biertuempfel

Bernd Woelfing

Michael Schwall

Norbert Greulich-Hickmann

Gerhard Hahn

Matthias Brinkmann

Petra Auchter-Krummel

Markus Garsche-Andres

Frank Fleissner

Ulrich Peuchert

Andreas Langsdorf

Simone Monika Ritter

Jochen Alkemper

Peter Nass

Rainer Liebald

Heinrich Ostendarp

Christof Kass

Dietrich Mund

Rainer Erwin Eichholz

Christian Schenk

Dirk Sprenger

Michael Weisser

Bernd Wölfing

Ulf Brauneck

Rüdiger Sprengard

Miriam Kunze

Martun Hovhannisyan

Juergen Leib

Christian Mix

Wolfgang Pannhorst

Gerhard Lautenschlaeger

Ralf Biertümpfel

Peter Naß

Eva Hoelzel

Arne Riecke

Markus Ollig

Volker Seidemann

Andreas Hirsch

Christoph Berndhäuser

Paulette Onorato

Edward Skowron

Christoph Groß

Vijay Shanbhag

Hubertus Bader

Sybill N&uuml;ttgens

Wolfgang Buergel

The present invention relates to glasses having a composition made up of base glasses. The glasses have a good chemical toughenability in combination with an advantageous coefficient of thermal expansion. Owing to their composition and the production process, the homogeneity of the properties of the glasses at their surface is high compared to the bulk glass. Furthermore, the fragility of the glasses is low, so that they can be processed to produce very thin glass articles.

Glasses having improved ion exchangeability and thermal expansion

The invention relates to glass articles, such as for example glass tubes or flat glasses, where the material at the surface by a targeted process control has gradient material properties which in turn result in a compressive prestress of the surface. The invention also relates to a method for the production of the glass articles as well as their use.

Prestress by use of a gradient material

A glass having a good hydrolytic resistance and alkali resistance is defined by a targeted combination of stoichiometric glasses, including glasses also existing as crystals in the same stoichiometry and whose properties can be assumed as being very similar due to the identical topology of the structural units for glass and crystal, respectively. A process of producing the glasses is also provided.

Glasses having improved hydrolytic and alkali resistance

An alkali borosilicate glass is provided that includes:  The proportions of the components are chosen in such a way that the weighted crosslinking index, that is, the mean number n of constraints per atom has a value greater than 2.9.

Borosilicate glass with low brittleness and high intrinsic strength, the production thereof, and the use thereof

A method for producing optoelectronic components, the method comprising the steps of: providing optical components; picking up, by means of a robot arm, the optical components provided; subsequent to picking up the optical components, mounting the optical components directly on a first wafer by means of the robot arm; wherein the first wafer has optoelectronic components attached, and the optical components being positioned individually or in groups relative to the position of the optoelectronic components of the first wafer using the robot arm; and utilizing, as the first wafer, a glass wafer having i) spectrally filtering glass being an infrared filter glass and ii) an infrared filter coating, the glass wafer having a thickness in the range of 50 to 500 micrometers.

Method for producing optoelectronic components, and products produced thereby

The invention relates to a method for the manufacture of packaged components. The invention is based here on the problem of facilitating the application of covers with lateral dimensions that are smaller than the lateral dimensions of the functional substrate. For this purpose, a plate-like cover substrate is mounted on a carrier substrate. Then, on the uncovered side of the plate-like cover substrate, trenches are inserted, so that a composite part is obtained with the carrier substrate and individual covering parts that are separated from each other by the trenches, but interconnected by the carrier substrate. The covering parts of the composite part are connected with a functional substrate with a plurality of components. Then, the connection of the covering parts is dissolved with the carrier substrate, and the carrier substrate is removed, so that a composite is obtained with the functional substrate and a plurality of covering parts that cover functional areas.

Method for packaging components

A method of hot forming of at least a part of an article is provided. The article includes a material selected from the group consisting of transparent and semitransparent materials. The method includes semi-homogeneously heating at least a part of the article by radiation and forming the heated part of the article.

Hot formed articles and method and apparatus for hot-forming

The glass is advantageous for microstructuring, especially reactive ion etching with fluorine and fluorine compounds, and has a glass composition based on oxide content and expressed in mol % of: SiO, 40-70; GeO, 0-30; BO, 5-20; PO, 5-20; WO, 0-10; AsO, 0-10; YbO, 0-5; and LuO, 0-5. Microstructure components, such as micro arrays, Fresnel lenses, micro wafers, or micro lens wafers, made by a method including reactive ion etching from the glass are also part of the present invention.

Glass composition exclusively consisting of oxides which already at low temperatures form volatile fluorides by reaction with fluorine and its use

The invention relates to a method for ceramizing starting glass of glass-ceramics into glass-ceramics, comprising at least the following steps: The invention is characterized in that

Method and apparatus for ceramizing the starting glass of glass-ceramics

A method for the homogeneous heating of semitransparent and/or transparent glass and/or glass-ceramic articles using infrared radiation so that the glass and/or glass-ceramic articles undergo heat treatment at between 20 and 3000&#xb0; C., notably at between 20 and 1705&#xb0; C. Heating is achieved by a component of infrared radiation which acts directly on the glass and/or glass-ceramic articles and by a component of infrared radiation which acts indirectly on said glass and/or glass-ceramic articles. The radiation component indirectly acting on the glass and/or glass-ceramic articles accounts for more than 50% of total radiation output.

Method and device for the homogenous heating of glass and/or glass-ceramic articles using infrared radiation

The invention relates to a method of producing glass-ceramic parts and/or glass parts by deformation of a glass-ceramic blank and/or glass blank. The invention is characterized in that forming is carried out using infrared radiation.

Method of forming glass-ceramic parts and/or glass parts

Process and device for ceramising the base glass of glass ceramics

A simple and economical method is described for compacting or shrinking flat glass panes. The method ensures high temperature homogeneity in the glass. First, the glass panes are cleaned and then a stack of glass panes to be treated is assembled without applying a release agent to any of the glass panes. Then the stack of glass panes is placed between ceramic panels made of silicon-infiltrated silicon carbide and this stack together with the ceramic panels is subjected to a heat treatment in a radiation furnace at temperatures ranging from 300&deg; C. to 900&deg; C. The ceramic panels have a thermal conductivity, which, in the region of the heat treatment temperature, is at least 5 times as large as that of the glass panes. The ratio of the total thickness of the ceramic panels to the height of the glass stack should be at least 1/&lgr;/40W/(mK), wherein &lgr; is the thermal conductivity of the ceramic panel at the temperatures of the heat treatment.

Method for compaction of flat glass panes

A single-mode optical fiber is doped to achieve a number of desired properties and have a refractive index profile n(r). The doped fiber must at least approximate the formula: ##EQU1## in which n.sub.o means the refractive index of the matrix material and r.sub.i =i.multidot..DELTA.r. A process for the production of the single-mode optical fiber is disclosed using at least 100 layers.

Single-mode optical, fiber and process for its production

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Wiesbaden, Germany

Ulrich Fotheringham