Gorilla glass, meet Dragontrail.

Asahi Glass Co., Japan's largest glass maker, on Thursday unveiled a supertough, scratch-resistant cover for gadgets that it says is six times stronger than conventional glass.

Called Dragontrail, the product represents Asahi's intensified ambitions to grab a chunk of the surging global market for smart phones and tablet computers. All those devices need a durable sheath to protect what's inside from the bumps, nicks and falls that inevitably come with use.