Online review shows that the Galaxy Z Fold 2 is more durable than the original Fold, but not by much

When Samsung launched its original foldable smartphone, it used a polyimide-based cover, and the screen was fragile and not very durable. Later in 2020 Samsung Display launched its ultra-thin-glass (UTG) cover (produced by Schott and processed by Dowoo Insys) which the company said is more durable the the Polyimide.

Samsung Electronics continued to adopt the new foldable UTG cover and used it in its Samsung's Galaxy Z Fold2 5G (7.6" 1768x2208 HDR10+ 120Hz Dynamic AMOLED) smartphone. But the question remains - just how more durable is the UTG-protected OLED?

Samsung Display announces a 1.4R foldable OLED display

Samsung Display announced that it has commercial a new foldable OLED display that is the first to achieve a curvature radius of 1.4R mm. This display will be adopted in Samsung's Galaxy Z Fold2 5G (7.6" 1768x2208 HDR10+ 120Hz Dynamic AMOLED) with an Ultra-Thin Glass (UTG) cover glass.

Samsung 1.4R foldable OLED display photo
Samsung says that in order to minimize the folding stress that is increased in such a small folding radius, the company has optimized a series of technologies related to the material of the display, the panel design and the module assembly, so that the multi-layered structure will function like a cushion when the panel is folded.

Samsung Electronics collaborates with Corning on Ultra Thin Glass technology for foldable OLEDs

Samsung started to adopt ultra-thin glass covers for its foldable AMOLEDs, instead of polyimide, as it says UTG offers higher durability. In the Galaxy Z Flip, Samsung used a UTG cover produced by Korea-based Dowoo Insys, who processes Schott's ultra thin glass for Samsung Display.

Samsung Galaxy Z Flip photo

In April 2020 it was reported that Samsung Electronics wants to develop its own UTG cover technology, as as it feels that Samsung Display's UTG is still not robust enough and the company also wants to increase production yields and reduce costs. Now there are new reports from Korea that say that Samsung Electronics is collaborating with Corning in this new UTG project.

UBI sees fast growth in Polyimide films and ultra-thin glass for foldable smartphone displays

UBI Research estimates that foldable smartphone display makers will continue to rely on both Ultra-Thin-Glass (UTG) and Colorless Polyimide (CPI) films for at least the next five years.

Foldable UTG and CPI market forecast (2020-2024, UBI)

UBI sees demand for CPI films will reach 4.3 million units in 2020 while demand for UTG will reach 3.5 million units. Demand for both products will grow and by 2024 it will reach 37.1 million units for CPI and 30.5 million for UTG.

Omdia sees 73 million foldable AMOLEDs displays shipped in 2025

Omdia says that the global foldable OLED display market will grow from 700,000 units to 3.9 million in 2020 (a 5X increase) - and will continue its fast growth to reach 73.1 million in 2025.

TCL foldable OLED device prototype, MWC 2019

Omdia says that the main challenge of the foldable OLED market is the reliability of the displays - mainly the cover, the touch sensor and the polarizer films. Display makers will need to adopt new technologies such as ultrathin glass covers (UTG), touch sensors on TFE and color filters on TFE

Samsung Electronics is looking to develop its own ulta-thin glass cover for foldable smartphones

Samsung Electronics's 2nd foldable smartphone, the Galaxy Z Flip, sports an ultra-thin glass cover, which replaced the polyimide one used in its previous foldable, the Galaxy Fold. The UTG glass cover is produced by Korea-based Dowoo Insys, who processes Schott's ultra thin glass.

Samsung Galaxy Z Flip photo

According to a new report from Korea, Samsung Electronics wants to develop its own UTG cover, as it feels the Dowoo Insys UTG is still not robust enough and the company also wants to increase production yields and reduce costs. SE is already in talks with several glass suppliers for this project.

SDC: our ultra-thin glass is more durable than polyimide for foldable OLEDs

Earlier this month Samsung announced the Galaxy Z Flip, its 2nd foldable smartphone - and the 6.7" 1080x2636 inward foldable HDR "Dynamic AMOLED" display uses a flexible glass cover, as opposed to SDC's previous foldable OLEDs that used a flexible polyimide cover.

Samsung UTG logo

Samsung now says that it is branding its ultra-thin-glass foldable OLEDs as Samsung UTG. I'm not sure what to say regarding Samsung's slogan "Tough, yet Tender" which seems to be taken out of a completely different industry.

Samsung launches its second foldable OLED phone, the Galaxy Z Flip

Yesterday Samsung announced the Galaxy Z Flip, its 2nd foldable smartphone, features a 6.7" 1080x2636 inward foldable HDR "Dynamic AMOLED" display. The external display is a small 1.1" 112x300 Super AMOLED. The Galaxy Z Flip will ship on February 14th, starting at $1,380 in the US.



Besides the new form factor, the Z Flip uses an ultra-thin glass cover - unlike the Galaxy Fold which used a plastic one. At least according to The Verge, this makes for a big improvement - it feels better, can't easily be "marked-up" by a fingernail and there's no visible crease. The Z Flip also feels much more refined - with no creaking and with a solid-feeling hinge.

Will Samsung's next foldable phone use ultra-thin flexible glass?

Samsung is working on its next foldable phone, which according to leaks will be called the Samsung Galaxy Z Flip. According to XDA's Max Weinbach, the new phone will be use ultra-thin flexible glass, instead of polyimide.

Samsung Galaxy Fold 2 - leaked photo December 2019

In November 2019 Samsung indeed signed an exclusive deal with Korea's Dowoo Insys to supply ultra-thin glass (UTG) for future foldable OLED devices. Samsung is aiming to switch to glass as its current foldable OLEDs which are protected by a plastic cover are highly prone for scratching and are very fragile.

JOLED to supply AGC with inkjet printed OLED signage displays

Japan-based glass developer Asahi Glass (AGC) is developing new ultra-thin (9 mm) glass signage display, called infoverre, that include OLED displays embedded within the glass which can be used in place where other display monitor installation was impossible - such as hanging ads in trains and buses and door pocket interior panels.

AGC - Glass Signage infoverre photo

JOLED, which recently started sampling inkjet-printed OLED display panels in its 5.5-Gen production line, is providing the OLED panels to AGC. AGC uses JOLED's 21.6" 4K rigid OLEDs - two panels for each display as the signage is double sided.

Cambridge Isotope Laboratories - Deutreated Reagents and High-Purity Gases for OLEDsCambridge Isotope Laboratories - Deutreated Reagents and High-Purity Gases for OLEDs