Leaked AT&T Galaxy Fold manual warns against peeling the screen off, dubs crease 'normal'
Samsung normalizes the Galaxy Fold crease
Galaxy Fold release date may be in June
How did Samsung go with a tough film that doesn't completely cover the corners, so it looks like a removable protector? Before the Fold's preview units were distributed, supply chain tips from Korean media hinted that Samsung has collaborated with the Japаnese from Sumitomo Chemical for producing a "luxurious" to the touch transparent polyimide (PI) that can be bent numerous times without any visible differences.
Korean media clarifies, however, that it is not only the transparent PI that Samsung used for the first Fold batch, but actually something new and extra that has the competition wanting in on the action. A previously unknown Hard Coat Anti-Fingerprint (HCAF) film by Sekyung sits at the very top of an SKC-made PET layer, to which a Samsung SDI Optically Clear Adhesive (OCA) is applied that then gets fused to said transparent PI film by a company called Biel Crystal.
That top HCAF layer is actually what provides the final protection of the Galaxy Fold screen, as it best mimics the oleophobic glass cover we are used to on our phones, rather than if we only had the transparent and flexible but soft PI film. Regardless of the design mishaps that may have led to people damaging their preview Fold units, an industry insider says that many phone makers have expressed interest in the new flexible display package developed by Samsung.
Previously, we thought that the PI film is simply attached to the OLED screen underneath with an extremely durable and flexible adhesive which should allow the package to bend at the middle by stretching a bit but not coming unglued and doing this many times while retaining its original size and form. Add to these the new top Hard Coat Anti-Fingerprint layer now, and the foldable display phones' top suddenly becomes a viable alternative to glass covers.