Core77 spoke with Apple Senior Vice-President of Design, Jonathan Ive, about iPhone 4's including the Retina Display, custom stainless steel antenna array, aluminosilicate glass front and back, and even the microSIM tray.
"A big part of the experience of a physical object has to do with the materials. [At Apple] we experiment with and explore materials, processing them, learning about the inherent properties of the material--and the process of transforming it from raw material to finished product; for example, understanding exactly how the processes of machining it or grinding it affect it. That understanding, that preoccupation with the materials and processes, is [very] essential to the way we work."
Ive focuses extensively on the importance of real material in an increasingly virtual world and seems driven by just how far he can take the manufacturing process to achieve his goald. For design aficionados and anyone wanting some insight into the mind behind iPhone 4, check out the link below.