Chosen Solution
With the reintroduction of force touch (originally 3D Touch, which no-one knew about, now called Haptic Touch) for iPhones, I’ve been pondering the possibility of accidental damage caused by excessive pressure on the screen. The screens themselves I know are very sturdy and are treated to take considerable force (far beyond that typically sustainable with a finger or thumb). The question is, does such pressure transmit internally, to the logic board, battery and other components? If so, what is the tolerance of these components to such pressure, and is there a feasible risk of damage if pressed too hard? To reframe the question in a more technical sense: For the iPhone 6S (the first 3D-Touch-enabled idevice) is there direct contact between the interior surface of the screen (the metal casing on the inside surface) and the logic board/battery, or is there an air gap between them?
No, there shouldn’t be unless someone is applying unnatural force. The logic board is secured via screws to the aluminum housing, and the battery is securely adhered to it as well. The screen is adhered to the housing to insure it is solidly bonded to the upper portion of the housing. In theory, the screen flexing doesn’t apply pressure to the battery or logic board.
