Corning challenges sapphire glass toughness claims

Gorilla Glass maker Corning is using some guerrilla marketing tactics to boost its product amidst all the hype surrounding sapphire glass.

Whether it’s an Android, BlackBerry, Apple or even Windows Phone product, all current smartphones have one thing in common – their displays are protected by Corning’s Gorilla Glass. Incredibly thin and light yet impressively strong, it’s the reason why phones (mostly) survive the wear and tear of modern life, from accidental falls to rubbing up against house keys in a handbag.

Sapphire glass, on the other hand, is universally accepted as being the toughest, strongest elemental substance next to diamond and, although it is much more expensive to create, can lay claim to being used by the military for making armor and by the world’s leading luxury watchmakers for protecting their precious timepieces.

What’s more, new techniques mean that production costs are coming down to the point where it will soon become affordable to phone makers. As such, Apple already uses sapphire glass, rather than Gorilla Glass, to protect the rear-facing camera on its iPhone 5.

However, Corning has hit back with a video demonstration to show its glass is four times stronger than its sapphire counterpart. Jeffery W. Evenson, senior vice president, explains of the demo: “Discussion seems to center around sapphire as an obvious solution for a cover material. What would people say if someone invented a cover that was about half the weight, used 99% less energy to make, provided brighter displays, and cost less than a tenth of sapphire? I think they’d say that sapphire was in real trouble. It so happens that we at Corning already invented that cover – and it’s called Gorilla Glass.” (Excerpt from GlobalPost)


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