Materials · 2007

Gorilla Glass

Ion-exchanged glass tough enough for touchscreens.

Corning revived its chemically strengthened glass for the first iPhone in 2007. It now covers billions of phone screens.

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 2

The dashed line marks when it first worked.

Mobile phone subscriptions per 100 people Latest: 112 per 100 people (2025) Source: Our World in Data