Foldable Phone - How Does the Screen Fold?

A sheet of glass snaps when you bend it. The glass on a folding phone bends two hundred thousand times. How: the week in 2019 when the first Galaxy Fold broke in reviewers' hands, the 30-micron glass from Schott that Samsung has used since 2020, the ten-plus layers under it and the neutral plane that keeps the pixels from feeling the bend, Apple's polymer-on-top design for the iPhone Duo, U hinges versus water-drop hinges, and why some screens still crack in their first week. Chapters: 0:00 Intro 0:32 The week it all broke 1:32 Glass thinner than a hair 2:50 What is under the glass 4:20 Two ways to build it 5:18 The hinge 6:22 Why they still break 7:31 Glass or polymer? Sources: https://thelec.net/news/articleView.h... https://www.schott.com/en-us/applicat... https://displaydaily.com/with-ultra-t... https://www.businesswire.com/news/hom... https://www.macrumors.com/2026/09/09/... https://www.techrepublic.com/article/... https://www.oled-info.com/samsung-dis... https://thelec.net/news/articleView.h... https://www.trendforce.com/presscente... https://www.thelec.net/news/articleVi... https://phonearena.com/news/Samsung-G... https://m.gsmarena.com/samsung_issues... https://www.tomsguide.com/phones/sams... https://www.engadget.com/2296498/ifix... https://www.latintimes.com/apple-ipho... https://www.gizmochina.com/2025/07/18... https://techaeris.com/2026/10/26/ipho... https://huaweicentral.com/huawei-mate... https://www.honor.com/global/phones/h... Photo credits: Galaxy Fold - 1.jpg: KKPCW, CC BY-SA 4.0 (https://commons.wikimedia.org/wiki/Fi...) Samsung Galaxy Fold in Taidong,Qingdao.jpg: qdjuncheng, CC BY-SA 4.0 (https://commons.wikimedia.org/wiki/Fi...) Samsung Galaxy Z Flip - 3.jpg: KKPCW, CC BY-SA 4.0 (https://commons.wikimedia.org/wiki/Fi...) Samsung Galaxy Z Flip fold.jpg: Grace R. Samson, CC BY 4.0 (https://commons.wikimedia.org/wiki/Fi...) Samsung Galaxy Fold7 Main Screen.jpg: Megapro17, CC0 (https://commons.wikimedia.org/wiki/Fi...) Apple Genius Bar Regentstreet London.jpg: Maebmij, CC BY-SA 3.0 (https://commons.wikimedia.org/wiki/Fi...) iPhone Duo product images and film: Apple (apple.com/iphone-duo); the crack clip adds a crack to Apple's frames with Midjourney Illustrations (peeled film, dust grain, salt bath, layer stack, pixels, book pages, U and water-drop hinges): made with Midjourney for this video, marked ILLUSTRATION News headlines shown: Tom's Guide (link above) Video clips: Pixabay (stock): glass shatter, https://pixabay.com/videos/id-273108/ Schott, SCHOTT UTG in foldable displays (schott.com) Apple, iPhone Duo product film and page (apple.com/iphone-duo) Huawei, Mate XT Ultimate Design product page (consumer.huawei.com) Honor, Magic V5 product page (honor.com) Samsung, Galaxy Z Fold8 product page (samsung.com) Apple, iPhone Duo product film; crack animated with Midjourney Script researched and fact-checked from the sources above. #FoldablePhone #FoldingScreen #UTG