https://wccftech.com/iphone-12-ceramic-shield-more-durable-tougher/

Adding wireless charging support to a smartphone can be considered as a double-edged sword at times. You now have the convenience to up the handset’s battery without charging it through conventional means but at the same time, the glass is at risk of being broken from both ends instead of one.

The iPhone 12 lineup isn’t different from any other Qi-certified smartphone but Apple has found a way to make at least one side more durable so that when you drop it, there’s a chance it might come out unscathed. This is all thanks to the use of Ceramic Shield, a protective glass cover developed by Corning to give each iPhone 12 model additional protection.