iPhone Ultra: The secrets of the groove-free screen

The very first foldable iPhone should finally be released at the end of 2026, a delay compared to the competition explained by Apple's desire to offer a "perfect" product, notably devoid of the visible crease that disfigures screens at the fold. Foldable iPhone, two layers of ultra-thin glass instead of one… Last year, the first technical details were revealed about how Apple would achieve this result. More recently, the Chinese "leaker" Digital Chat Station mentioned new techniques, apparently gleaned from the device's Asian production lines. We now know that the iPhone Ultra will be equipped with two layers of ultra-thin flexible glass (UTG or UFG), sandwiching the screen itself, thus avoiding direct contact with the hinge. The mechanical stress is thus distributed over several layers rather than one, increasing the overall strength and limiting the formation of a visible groove on the screen surface. This process therefore differs from competing models, which generally use a single UTG layer that serves two purposes: supporting the folding stresses and protecting the screen.