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Apple Explains What's Inside the iPhone Duo's Folding Screen
The iPhone Duo's inner display uses a complicated, multi-layer structure that Apple says will hold up to wear and tear. There are 10 ultrathin layers in total, including a nano-textured cover layer made from a custom polymer that Apple says is up to 40 percent stiffer than "other materials used in the industry," which presumably means other foldable devices.
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