The machine has been developed to temper coatings on displays in phones and tablets, as well as anneal crystals in coatings and activate dopants.
Such coatings are between 100nm and 100µm thick and contain particles and molecules that need to have cooled off fractions of a second after they have reached their refinement temperature so that they keep their desired properties and structure – all this without thermally weakening the underlying glass by changing its temper.
“Glass is a fragile material. Processing the surface is a great challenge that can only be solved through very selective and extremely fast heating and cooling “, said company engineer Dirk Hauschild. “Thanks to the line beam profile, the user is able to evenly temper large surfaces without changing the characteristics of the substrate material.”
Called Activation Line 300, and designed for 24/7 operation, the laser can deliver 13kW continuously into a line 300mm long at intensities up to 40kW/cm2. Electro-optic energy efficiency is over 40%. It will be on show at Glasstec 2014 – Messe Düsseldorf 21-24 October
Other applications include treating windscreens and safety glass.
from News http://ift.tt/1rHvsSl
via Yuichun
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