Dragontrail

Dragontrail, manufactured by Asahi Glass Co., is an alkali-aluminosilicate sheet glass engineered for a combination of thinness, lightness and damage-resistance, similar to Corning's Gorilla Glass. The material's primary properties are its strength, allowing thin glass without fragility; its high scratch resistance; and its hardness  with a Vickers hardness test rating of 595 to 673.[1]

To date, some of the cell-phone models that have incorporated this type of protection are:

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