A field coil for an electromagnetic rotor comprising multiple windings, each substantially entirely coated with a powder resin having a dielectric strength of at least in the range of 1000-1500 vmil. A base of the transistor includes a silicon germanium layer. The rack rails have both a first and second standard interface. With the seat back in the predetermined position and the seat in the forward position, the headrest is movable from said retracted position forward and down to the locking position to capture the steering wheel between the headrest and the seat back. With such protection, the binder and other organics can also be efficiently removed and produce superior performance in the piezoelectric structured devices.