• The 3D Touch sensor assembly lives on the very back of the display panel, and is fairly easily separated from the backlight, display, and digitizer glass.
• The home button cable has been replaced by traces along the side of the 3D Touch sensor panel, eliminating the need to transfer the cable for certain display repairs.
• The sensor panel is a grid of rectangular capacitor plates, connected to the controller IC by very tiny traces. These plates would be huge for a touch sensor—luckily their job isn’t to pinpoint your fingertip on the screen, as the in-screen digitizer will still handle that. These sensors measure the distance to your finger, equating to the force of a press through pliable glass.
Not satisfied with the highlights? Wander on over to the full teardown for all the details.