Down-draw process fabricates ultrathin glass

Oct. 9, 2012
Scientists at Schott AG have developed a down-draw process that moves molten glass using a nozzle and roller system into an ultrathin glass sheet, in much the same way that optical fibers are drawn from a glass preform.

Scientists at Schott AG (Mainz, Germany) have developed a down-draw process that moves molten glass using a nozzle and roller system into an ultrathin glass sheet, in much the same way that optical fibers are drawn from a glass preform. This process creates a naturally fire-polished ultrathin sheet of glass, eliminating the need for additional grinding and polishing to meet application requirements.

The glass produced in the down-draw process covers the range of thickness from 1.1 mm down to 20 μm. In addition to the wide thickness range, the down-draw surface-defect level fulfills tight demands with ±5 μm and 10/5 scratch/dig (according to MIL-PRF-13830B), respectively, with 2–3× improved surface roughness at <0.8 nm and, depending on the glass type, low thermal expansion (3.25 ppm/K) and high temperature stability (>600ºC). In addition, the down-draw process is very flexible when it comes to changing production materials according to customer requirements: The down-draw process can be reconfigured in just days to handle different glass types and different thicknesses. Contact Tara Maggiano at [email protected].

About the Author

Gail Overton | Senior Editor (2004-2020)

Gail has more than 30 years of engineering, marketing, product management, and editorial experience in the photonics and optical communications industry. Before joining the staff at Laser Focus World in 2004, she held many product management and product marketing roles in the fiber-optics industry, most notably at Hughes (El Segundo, CA), GTE Labs (Waltham, MA), Corning (Corning, NY), Photon Kinetics (Beaverton, OR), and Newport Corporation (Irvine, CA). During her marketing career, Gail published articles in WDM Solutions and Sensors magazine and traveled internationally to conduct product and sales training. Gail received her BS degree in physics, with an emphasis in optics, from San Diego State University in San Diego, CA in May 1986.

Sponsored Recommendations

Download New Product Development Strategies White Paper

March 27, 2025
Discover the importance of new product innovation, different process methods, and best practices for optimizing your company’s strengths.

Manufacturing Considerations for Tolerancing Aspheres

March 13, 2025
Understand the critical factors in manufacturing aspheres and how Lacroix Optics ensures precise tolerancing in every optical component.

Explore Our Videos: Insights into Precision Optics

March 13, 2025
Get an inside look at Lacroix Optics with our collection of informative videos showcasing our capabilities, innovations, and processes.

Optical Assemblies: Reliable and Precise Solutions

March 13, 2025
Ensure your optical system works seamlessly with Lacroix Optics' custom optical assemblies. Discover the precision and reliability we bring to every project.

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!