Schott Ag

Schott Glass Technologies, Inc.

Hellma Materials Gmbh & Co. Kg

Universiteit Twente

Martin Letz

Ulrich Peuchert

Bernd Hoppe

Joseph S Hayden

Bianca Schreder

Thilo Zachau

Martun Hovhannisyan

Friedrich Siebers

Jochen Alkemper

Sally Pucilowski

Dirk Sprenger

Daniela Seiler

Ruediger Sprengard

Karine Seneschal-Merz

Sabine Pichler-Wilhelm

Lutz Parthier

Michael Kluge

Holger Wegener

Jose Zimmer

Steffen Reichel

Bernd Ruedinger

Mark J Davis

Linda Johanna Bartelt

Julia Gold

Antonio Trizzino

Hans-Heinrich Gundelach

Frank-Thomas Lentes

Ina Mitra

Albrecht Seidl

Lutz Klippe

Wolfram Beier

Yvonne Menke

Matthias Jotz

Frank Buellesfeld

Carsten Weinhold

Gunther Wehrhan

Adam O'Ryan

Gerhard Lautenschläger

Yoshio Okano

Ute Natura

Axel Engel

Regina Martin

Klaus Petermann

Joerg Staeblein

Ulrike Stoehr

Ulrike Stöhr

Hubertus Braun

Karine Seneschal

Keith Gregory Rozenburg

Konrad Knapp

Gordon Kissl

Maria-Louisa Reich

Ioannis Neitzel

Adam O' Ryan

Pepijn Pinkse

Allard Mosk

Ruediger Sprenhard

Carol Click

Maria-Louisa Aigner

Martina Dressler

Stephan Knoener

Thomas Kloss

The present disclosure relates to pane-like articles, such as glass or glass ceramic substrates, suited for microwave-shielding applications, such as microwave oven doors or covers for electronic components. The present disclosure further relates to a household appliance comprising a pane-like article.

Pane-like article and its use, and household appliance comprising the same

The disclosure relates to a glass and a melt solder for the passivation of semiconductor components, the use of the glass or the melt solder for the passivation of semiconductor components, a passivated semiconductor component and a method for passivating semiconductor components.

Glass and melt solder for the passivation of semiconductor components

An optical converter is provided that has both a stable colour even at highest luminous powers and a high luminous efficiency. The optical converter includes a ceramic element that is fluorescent so that light of a first wavelength is absorbed in the ceramic element and fluorescent having longer wavelength light is emitted. The ceramic element includes pores spatially irregularly distributed within the ceramic element. The distribution of the pores within the ceramic element is inhomogeneous so that the radial distribution function of the pore locations deviates from unity and has a maximum at a characteristic distance, the maximum having a value of at least 1.2.

Optical converter

An apparatus for authenticating an optical key and an apparatus for generating a random number from an optical key are provided. The optical key is used for reliable authenticatability and the random number is stable when or after the optical key is exposed to an external influence such as, but not limited to, a physical or chemical stimulus including a different ambient condition, a mechanical stress, or chemical contact.

Optical key protected authentication and encryption

A glass-ceramic is disclosed, this glass-ceramic includes at least the following constituents (in mol % on oxide basis): SiO1-30, AlO0-20, BO0-25, TiO10-70, REO0-35, BaO 5-35, SiO+AlO+BO&#x3c;25, where RE is lanthanum, another lanthanoid, or yttrium, and where Ti may be replaced in part, preferably up to 10%, by Zr, Hf, Y, Nb, V, Ta. A principal phase in the glass-ceramic is BaTiO.

Glass-ceramic as dielectric in the high-frequency range

A capacitor having a dielectric consisting of a glass layer with an alkali metal oxide content of at most 2 wt % and a thickness of at most 50 &#x3bc;m is provided. The capacitor includes at least two metal layers which are separated by the glass layer. The glass layer is preferably produced by a down-draw method or by an overflow down-draw fusion method.

Capacitor and method of making same

A glass-ceramic having at least two crystal phases, wherein at least one crystal phase has a positive temperature dependence of the resonance frequency &#x3c4;, at least one crystal phase has a negative temperature dependence of the resonance frequency &#x3c4;and the glass-ceramic has a resulting temperature dependence of the resonance frequency &#x3c4;of 0 ppm/K with a maximum deviation of +/&#x2212;20 ppm/K, is described. Furthermore, a process for producing such a glass-ceramic and the use of the glass-ceramic are described.

Glass-ceramic having at least two crystal phases, process for producing a glass-ceramic and its use

A process for the production of a glass-ceramic comprises the following steps:

Glass-ceramic containing nanoscale barium titanate and process for the production thereof

The process of making the glass-ceramic includes ceramicizing a starting glass at a heating or cooling rate during the ceramicization of at least 10 K/min, so that the glass-ceramic contains at least 50% by volume of ferroelectric crystallites with a maximum diameter of from 20 to 100 nm and not more than 10% by volume of nonferroelectric crystallitesis. The glass ceramic produced by the process contains no pores or not more than 0.01% by volume of the pores and a value of e'&#xb7;Vof the glass-ceramic is at least 20 (MV/cm), wherein e&#x2032; is the dielectric constant at 1 kHz and Vis the breakdown voltage per unit thickness. The ferroelectric crystallites preferably have a perovskite structure and are composed of substantially pure or doped BaTiOand/or BaTiO.

Process of producing a glass-ceramic, the glass-ceramic made therby and its uses

The invention provides a method for producing a glass ceramic comprising the steps of melting a starting glass that is free from alkali, except for incidental contamination, and that contains at least one garnet-forming agent and at least one oxide of a lanthanoid; grinding the starting glass to produce a glass frit; molding by pressing and sintering the glass frit until at least one garnet phase containing lanthanoids is formed. A glass ceramic produced in this way may contain 5-50% by weight of SiO, 5-50% by weight of AlOand 10-80% by weight of at least one oxide selected from the group formed by YO, LuO, ScO, GdO, YbO, CeO, as well as 0.1-30% by weight of at least one oxide selected from the group formed by BO, ThO, and oxides of the lanthanoids, except LuO, GdO, YbO, CeO. Such a glass ceramic is suited especially for down conversion of excitation radiation in the blue and in the UV region of the spectrum.

Sintered glass ceramic and method for producing the same

The invention proposes a method for producing glass ceramics which is particularly well suited as light conversion material, especially for down conversion. One initially produces a starting glass, containing (on an oxide basis) 5-50% by weight of SiO, 5-50% by weight of AlOand 10-80% by weight of at least one oxide selected from the from the group formed by YO, LuO, ScO, GdO, YbO, CeO, as well as 0.1-30% by weight of at least one oxide selected from the group formed by BO, ThO, and oxides of the lanthanoids, except LuO, GdO, YbO, CeO. Thereafter, the material is heated up for ceramization at a heating rate of at least 100 K/min to a temperature in the range of between 1000&#xb0; C. to 1400&#xb0; C. until crystallites are formed that contain a garnet phase. Thereafter, the material is cooled down to room temperature. Alternatively, controlled cooling-down from the molten state is possible.

Method for producing a glass ceramic having a garnet phase

The invention provides a method for producing a glass ceramic comprising the steps of melting a starting glass that is free from alkali, except for incidental contamination, and that contains at least one garnet-forming agent and at least one oxide of a lanthanoid; grinding the starting glass to produce a glass frit; molding by pressing and sintering the glass frit until at least one garnet phase containing lanthanoids is formed. A glass ceramic produced in this way may contain 5-50 % by weight of SiO, 5-50 % by weight of AlOand 10-80 % by weight of at least one oxide selected from the group formed by YO, LuO, ScO, GdO, YbO, CeO, as well as 0.1-30% by weight of at least one oxide selected from the group formed by BO, ThO, and oxides of the lanthanoids, except LuO, GdO, YbO, CeO. Such a glass ceramic is suited especially for down conversion of excitation radiation in the blue and in the UV region of the spectrum.

A process and a device is described to avoid the depolarization of linear-polarized light during the transmission of light through crystals exhibiting a {111} or {100} crystal plane, respectively, and a &#x3c;100&#x3e; or &#x3c;111&#x3e; crystal axis, respectively. The device is characterized in that the linear-polarized light meets the surface of the crystals in an angle of 45-75&#xb0;, whereby the surface is formed by the {111} or the {100} plane. The crystal is arranged in such a way that upon entering the crystal, the light spreads along the &#x3c;100&#x3e; or &#x3c;111&#x3e; crystal axis, respectively, as parallel as possible, and/or that the device comprises a unit for temperature equalization to avoid a thermal gradient in the crystal. Preferably the device is used in DUV lithography, in particular in steppers and excimer lasers, as well as for the production of integrated circuits, computer chips as well as electronic devices such as computers, and other devices that comprise chip-type integrated circuits, as well as for flat screens.

Arrangement and method for preventing the depolarization of linear-polarized light during the transmission of light through crystals

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Mainz, Germany

Martin Letz