Samsung Galaxy Z Fold Has Evolved Into Towards Slimmer, Firmer Models

Foldable phones, as the name suggests, are devices with a central hinge and two folding sides. Samsung has consistently improved the hinge mechanism in its Galaxy Z Fold series, making it thinner and more compact with each iteration. The company's innovations have enabled users to carry their foldable phones easily and conveniently.

The Galaxy Z Fold2, released in 2020, featured a Hideaway Hinge that connected the smartphone's body while supporting stable folding and unfolding. This hinge allowed users to position the device at various angles for selfies and video calls in Flex Mode. The Hideaway Hinge was designed with over sixty parts, including a dual CAM mechanism that helped keep the device open or closed. By increasing the number of CAM structures and springs, the hinge could support wider angles.

Samsung addressed the issue of gaps between the front of the device and the hinge housing by developing Sweeper Technology. Inspired by vacuum cleaner brushes, this technology used delicately cut optical fibers to protect the phone's display from external dust and debris.

In 2021, Samsung introduced the Galaxy Z Fold3, which was the first foldable phone to be water-resistant. The company applied waterproofing technology to both the outer part of the display and the hinge. The outer part of the display was surrounded by a rubber band that prevented dust and liquid from entering, while corrosion-resistant materials were used for metal parts of the hinge.

The Galaxy Z Fold3 also featured Armor Aluminum, a robust material that withstands external shocks and reduces deformities or scratches. This material was applied to both edges of the exterior and to the housing surrounding the hinge. As a result, Samsung managed to make its foldable phone even thinner and lighter.

The Galaxy Z Fold4, unveiled in 2022, saw significant reductions in weight and thickness compared to its predecessors. Samsung redesigned its hinge to accommodate a wider width and shorter length for the Cover Screen. The new hinge changed its motion from rotary to linear, which reduced weight, thickness, and part count.

In 2023, Samsung introduced another innovation with its Galaxy Z Fold5: a new type of mechanism called Flex Hinge. This hinge allowed for improved flexibility and made it possible for displays to curl into it like a water droplet using four drive shafts and a dual rail structure. The Flex Hinge enabled even folding without creases or gaps.

Samsung continues refining its Galaxy Z Fold series through precise engineering and meticulous manufacturing processes. By reimagining hinges and device thickness—core attributes of foldables—the company has significantly enhanced their utility. Samsung remains committed to building on its legacy of unprecedented foldables for an even more convenient life.

Experience Samsung's next generation of innovations at Galaxy Unpacked on July 10 in Paris.