Schott Ag

Schott Glass Technologies (suzhou) Co. Ltd.

Thomas Wiegel

Jürgen Vogt

Andreas Habeck

Andreas Ortner

Ulrich Lange

Clemens Ottermann

Rainer Liebald

Pengxiang Qian

Thomas Rossmeier

Stephan Zachmann

Marten Walther

Kurt Nattermann

Markus Heiss-Chouquet

Holger Wegener

Feng He

Matthias Jotz

Ning Da

Georg Helmut Sparschuh

Thomas Roßmeier

Florian Resch

Gregor Kübart

Rainer Schwertfeger

Guangjun Zhang

Angelika Ullmann

Frank Macherey

Ulrich Battmer

Uwe Wilkens

Yanquan Shan

Dirk Sprenger

Georg Sparschuh

An improved method and an improved apparatus are provided for producing a thin glass ribbon, which provide borders at the edges of the ribbon. The edges formed are of high mechanical quality and a formation of new secondary borders after the severing or at least the thickness of such secondary borders is reduced compared to the original borders. The method includes drawing the thin glass ribbon from a molten glass or from a preform, severing the borders, and cooling the resulting glass ribbon. The severing is effected at a location along the moving direction of the thin glass ribbon and at a time at which during the cooling of the thin glass ribbon the viscosity of the glass is in a range from 10dPa·s to 10dPa·s, so that the edges of the thin glass ribbon newly produced by the severing of the borders are rounded off.

Method and apparatus for producing a thin glass ribbon, and thin glass ribbon produced according to such method

A diffractive optical element is provided that includes at least two layers with different etching speeds for dry etching process. The diffractive optical element has a substrate of glass and a microstructure layer arranged on the substrate. The ratio of dry etching speed in thickness direction of the substrate to that of the microstructure layer is no more than 1:2 so that the substrate functions as an etching stop layer. The ratio of dry etching speed in horizontal direction of the substrate is substantially equal to that of the microstructure layer. The composition of glass includes, but is not limited to, AlO3, alkaline material (MO) and alkaline earth material (MO), where the weight percentage of AlO+MO+MO>=5%.

Diffractive optical element and method for manufacturing the same

A glass roll includes at least one glass film and one intermediate material one on top of the other in at least two layers onto a winding core. The glass film layers are held in place by the intermediate material layers. The glass roll is produced with a method including provision of a glass film, a winding core and a compressible intermediate material. At least one inside layer of the intermediate material is wound onto the winding core. The glass film and the intermediate material are wound onto the winding core in such a manner that the glass film is wound onto the winding core in alternating layers with the intermediate material. The intermediate material and/or the glass film is wound at a tensile stress acting in a longitudinal direction which causes a compression of the intermediate material and holds the glass film end in place on the glass roll.

Pre-stressed glass roll

A composite includes a component and a glass or glass ceramic material. The component has a first coefficient of expansion &#x3b1;and the glass or the glass ceramic material has a second coefficient of expansion &#x3b1;. The glass or the glass ceramic material has a surface with a thickness and thickness differences (TTV) within the surface, and thickness fluctuations (LTV). The composite has a residual stress in the glass or the glass ceramic material (WARP), and a geometric and material-physical degree of compatibility KG&#x2265;4.

Composite including a component and a glass material

A glass ribbon in the form of a glass roll is provided that is optimized with respect to the requirements of a long service life and at the same time compact dimensions. A bending radius on the inner side of the thin glass roll is determined by performing breakage tests on samples of the glass material, statistical parameters are determined on the basis of the breakage tests, and the statistical parameters are converted into a range of bending radii which meet the requirements on service life and the most compact dimensions possible of the thin glass roll.

Thin glass roll and method for producing same

An improved method and an improved apparatus are provided for producing a thin glass ribbon, which provide borders at the edges of the ribbon. The edges formed are of high mechanical quality and a formation of new secondary borders after the severing or at least the thickness of such secondary borders is reduced compared to the original borders. The method includes drawing the thin glass ribbon from a molten glass or from a preform, severing the borders, and cooling the resulting glass ribbon. The severing is effected at a location along the moving direction of the thin glass ribbon and at a time at which during the cooling of the thin glass ribbon the viscosity of the glass is in a range from 10dPa&#xb7;s to 10dPa&#xb7;s, so that the edges of the thin glass ribbon newly produced by the severing of the borders are rounded off.

A glass roll, as well as a device and a method for manufacturing the glass roll are provided. The glass roll includes a glass ribbon having a thickness, a length in an x-direction, and a width in a y-direction. The glass ribbon has at least one defect site at a position, as well as at least one error mark disposed on the glass ribbon, and is wound up into a glass roll.

Glass roll, product having a glass roll, device and method for the manufacture thereof

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Alfeld, Germany

Thomas Wiegel