The durable glass bendy phones need could be years away

I’ve loved the idea of folding gadgets ever since Arthur C. Clarke talked about flexible “SoftScreens” in books like, The Light of Other Days. A device that can be folded and crumpled without breaking? That’s my idea of the perfect gadget, and while the bendy Samsung Galaxy Fold and Huawei Mate X seem like they bring us one step closer to that, in reality, the first batch of folding phones are going to be even more fragile than the smartphone you carry now—at least until a few other crucial technologies catch up.

The glass screen on the smartphone you’re currently using is a marvel of chemical engineering, designed to withstand taps, pokes, swipes, the occasional run-in with your keys, and even repeated drops.

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What it can’t do is bend or flex past a certain degree, which you may have accidentally discovered after sitting on a phone left in your back pocket. So the first wave of folding phones—including the Galaxy Fold, Mate X, and the Royole FlexPai—instead use plastic screens which appear to fold as easily as paper does in the demos we’ve seen; but they’re hiding a dirty secret.

Unless you’re desperate to remain on the bleeding edge of smartphone tech, you’re better off waiting a few years to upgrade to a folding device. Wired’s Brian Barrett spoke to John Bayne, the Senior Vice President and General Manager of Corning’s Gorilla Glass product. The company is working to merge the strength and resilience of Gorilla Glass with the flexibility of another Corning product: Willow Glass, which is flexible enough to bend and roll making it ideal for industrial and architectural applications at the moment.

One of the biggest challenges with adapting the Willow Glass technology for use on touchscreen devices is that it’s manufactured using sodium materials like potassium; and salt simply doesn’t play nice with the transistors required to make touchscreens work. Nevertheless, Corning has already delivered a few early samples of a flexible Gorilla Glass product to OEMs, and Bayne predicts it will only be a few years before bendy phones will be as durable as the rigid slabs of glass we all use now.

If you’re hell-bent on owning a folding device as soon as possible, Huawei revealed a sleeve case that will be available for the Mate X at launch to help protect it, and Samsung’s inward-folding approach for the Fold X will by design keep its screen safe while the phone jangles around in your pocket. But if you can wait a few years, there are better technologies en route for this new wave of devices.

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