Anti-tamper coatings in the nature of multi-layer coatings composed of embedded electromagnetic pathways and a frangible outer layer used in the manufacture of printed circuit boards

Anti-tamper coatings in the nature of multi-layer coatings composed of embedded electromagnetic pathways and a frangible outer layer which can be applied to the surface of various items, including electronic circuit boards, upon completion of the manufacturing process to render a surface which would reveal unauthorized tampering