Oppo used laser scanning to measure the hinge surface at 0.3 micrometer precision, and then used 3D liquid printing to apply polymer droplets, which it then UV-cured layer-by-layer. This reduces the hinge unevenness from about 0.2 mm to 0.05mm.
Oppo has a new 2nd-generation Titanium Flexion Hinge, which is made using a liquid 3D printed component. The development process starts with precise laser scanning, which creates a high-fidelity model for each surface of the hinge. The process then moves to the liquid 3D printing phase, where Oppo uses tiny photopolymer resin droplets to fill uneven areas. The 3D printing process helps eliminate any structural irregularities at a microscopic level.
According to a report by DealSite, Samsung will be incorporating new display technology into its upcoming Galaxy Z Fold8 foldable this summer. This will allow it to decrease the visible crease by around 20%, although we are not sure how one can measure crease visibility reliably enough. The company will reportedly use UTG (Ultra Thin Glass) not only for the display's top layer, but also for the bottom end.