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Ultra-thin Soft Glass Can Be Used For OLED Products

Ultra-thin Soft Glass Can Be Used For OLED Products

Apr 15, 2017

The German Konfekt research program aims to promote the development of ultra-thin soft glass, through the use of functional adhesive tape lamination and special adhesive layer, for the realization of soft glass optimization, and further used in organic electronics and other new generation of OLED products manufacturing.

A German Konfekt study plans to develop soft glass with only 25 microns thickness, which can be used as a substrate for organic printing electronics and solar cells, and to further promote the application of a new generation of organic light-emitting diodes (OLED) products.

Konfekt Research Alliance in Germany, Deleuse, Fraunhofer FEP hosted VISION | Flexible Glass Conference shows the first research results. The Alliance comprises the Fraunhofer Institute of Organic Electronics, the electron beam and plasma Technology Institute, the first German (SCHOTT), VON ARDENNE and the adhesive tape maker Desa (TESA).

Ultra-thin glass thickness can reach 150um, and in Germany Schott is located in Grunenplan Factory production, using direct hot-forming tensile process, in which molten glass through the nozzle pulled out the ideal thickness. The key is that glass can be produced in a low-cost volume to Volume (R2R) process, and the process is being developed further, which is expected to be optimized by the mid-2018. The adhesive tape manufacturer Tesa The final lamination step of the glass with special binder and functional layer to provide a comprehensive protection.

SCHOTT and Tesa try to prevent sensitive electronic components (such as OLED) from the effects of humidity and oxygen by ultra-thin glass. Reliable encapsulation helps prevent aging of sensitive components. Reasonable layout as the topmost barrier layer, because it will form a chemical impervious layer, even if the thickness is only 10 microns, can also block water, steam and oxygen. The Tesa function in the lateral seal — the ultra-thin glass that is delivered to the user will be laminated with a special adhesive layer. This bonding layer ensures that not only the surface of the component is sealed by the glass, but also not the liquid and gaseous diffusion.

The use of soft glass substrates can lead to a series of benefits in optics quality, temperature stability, chemical consistency, gas density and mechanical resistance, the researchers said. It can also be used as a substrate for low-cost solar cells.

The vacuum coating system specially used for soft glass R2R coating can satisfy the special processing requirements of soft glass. This soft glass can be used as a functional substrate in complex electronic industry applications, such as transparent conductive oxide film (TCO), such as indium tin oxide (ITO), using the same method used in the manufacture of OLED or solar cells, in a special vacuum PVD coating process.

Fraunhofer, FLATLAB director Manuela Junghahnel, said, "Fraunhofer FEP is the main R & D center of soft glass manufacturing, enough to call the industry a number of important global industry, including glass manufacturers, mechanical engineers and end-users." We are working on further development and expansion of the network to provide more innovative ideas for pioneering applications in this area. 

"Printed electronic products are a growing market, and ultra-thin special glass can provide the best substrate for them." "This is why we look forward to previewing the existing research," said Thomas Wiegel, a SCHOTT ultra-thin glass application engineer. We plan to produce a glass prototype with a roll-to-roll process, which will be sufficient to show our current research results and the direction we plan to move forward. ”