According to one embodiment, there is provided a substrate bonding method. In a preferred form, the body is made of a non-conducting material, such as ceramic or plastic, and the high magnetic permeability material is made of a magnetic material such as ferrite or a metallic glass alloy. 14 times or more of the outside diameter of the rotor. Among alternative embodiments, a gating structure selected of various present alternative designs may be used to partially cover, to an intentionally selected degree, an active area of a Hall sensor, so that a zero-drift supply current value may likewise be selected so as to satisfy other criteria which may be applicable to use of the Hall sensor. Optional, but preferred additional thermal treatment of the shaped, inorganic body removes the organic substrate, leaving an inorganic body that faithfully mimics the porosity, shape, and other physical characteristics of the organic substrate.