What are the phones and tablets’ Gorilla Glass screens made of?

The glass is one of the most common elements on a mobile device. As for phones, glass is an element that keeps growing in size, and today we are going to focus on the glass used on our devices’ touchscreen. Although we know that most phones and tablets’ touchscreens use a special glass that is more durable than that of our windows, we do not know what they are made of.

Tempered glass is currently the most widely used glass on our devices

The glass of our windows is much fragile than the one on our phones. A lot of users have accidentally dropped their last-gen smartphones, watching them drop slowly but surely to the ground. Luckily, a lot of users have felt relieved after picking up their phones and see that they still work.

The glass that is found on our phones is known as tempered glass. Tempered glass, like the one used by Corning Gorilla Glass, is more durable because they are chemically strengthened. This glass undergoes an ion-exchange process. The glass used by Corning has sodium ions that are easily replaced by potassium ions. To strengthen it, the glass with sodium ions is put in a bath of potassium salt at a temperature of 400 degrees Celsius. At this temperature, the potassium is capable of replacing the sodium ions. This compresses the glass at a molecular level, making it highly scratch and damage resistant.

Tampered glass can be used on our smartphones, tablets and touchscreen laptops. The possibility of using sapphire to create glasses has been studied for years. A sapphire’ molecular structure makes it a highly durable element that is almost impossible to scratch. “But sapphires are blue;” this gem’s color is attributed to imperfections that can be worked on to make the material become entirely clear, which would be better because the material would be clearer than the one currently being used. Besides being almost impossible to scratch, this kind of glass is damage resistant.

However, using sapphires is not possible yet because turning sapphires into glass is expensive: producing a sapphire glass costs ten times more than producing a Gorilla Glass. Apple tried to create its own sapphire glass factory, but the project was put on hold in the end.