A question about the N4 and wireless charging.

Will the back of phone, where the coil is, get really hot when charging?

The reason I ask is that I have a 4S at the moment, which obviously has front and back glass. To avoid scratches I use front and back 'screen' protectors, which maintain the aesthetics of the phone while keeping protected from scratches.

If I do the same with the N4, will the back one melt?