Our team had to create a high-quality display that could be folded but resistant to debris - which meant we had to change the plate supporting the display. One of the early advancements was the development of Pressure Sensitive Adhesive (PSA) that helps the display when folding in various conditions and environments.
Another major material advancement was the Ultra Thin Glass (UTG), which was introduced with the first Galaxy Z Flip in 2020. UTG has become a standard component of folding displays. 'With the adoption of UTG, we were able to deliver a clearer display - complete with a premium look and feel that had yet to be seen on a foldable smartphone. UTG has been used ever since,' says Noh.
Fast forward to 2024 and the Samsung Galaxy Z Fold6 and Z Flip6, which introduce a so-called 'Protect Layer' structure. A key component of that is yet another innovative material, Shear Thickening Fluid (STF). STF adapts to different amounts of pressure so that it resists deformation from impacts. This has made the 6-series foldable displays the most durable yet.
Jumping back in time to 2021, the Galaxy Z Fold3 and Z Flip3 were the first foldables to feature water resistance with a high IPX8 rating. This was done using a rubber band that runs around the perimeter of the display and seals it against liquids.
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