Touch 3D for iPhone 6S and iPhone 6S Plus is probably one of the main functions created by the Apple company and this was reiterated by Tim Cook in an interview given to an important American publication during the past few days.
According to Tim Cook and other Apple managers, 3D Touch for the iPhone 6S and iPhone 6S Plus required several years of development to reach the stage it is now, with Phil Schiller stating that Apple invested large amounts of money to be able to realize the technology.
In order for 3D Touch to be implemented in the iPhone 6S and iPhone 6S Plus, Apple collaborated with Corning and created a front panel made of bendable glass, with 96 sensors placed over the touch panel to interpret the touches made by users .
The whole system works on the basis of Peek and Pop tests, which also generate a tactile feedback of 10-15 milliseconds after pressing to tell the user that the action taken by him has been recorded by the operating system.
Working with Corning, Apple created foldable iPhone cover glass. Swipe it, and the phone works the way it always has. But press it, and 96 sensors embedded in the backlight of the retina display measure microscopic changes in the distance between themselves and the glass. Those measurements then get combined with signals from the touch sensor to make the motion of your finger sync with the image on the screen. […]
To make what is counterintuitive feel normal, each on-screen "peek" and "pop" is accompanied by a 10-millisecond or 15-millisecond haptic tap, little vibrations that say "good job" to your fingers when an action is complete.
Additional details about the difficulties of creating 3D Touch for iPhone 6S and iPhone 6S Plus can be found in the dedicated article from the American magazine.
https://www.youtube.com/watch?v=cSTEB8cdQwo
