As a general purpose shield, layer 26 may include additional fillers of some or all of the following general types of particulate fillers: conductive and ferromagnetic metals such as Ni, Co, Fe, Fe/Co alloys, Fe/Ni/Co alloys, and other alloys of these metals; lossy ferrite materials such as Ni ferrite or Mn ferrite, or magnetic oxides; or dielectric materials such as barium titanate, strontium tit