Recent content by enrico85IT

Planar technology: working the silicon wafer surface by repeating a series of basic operations. Heat treatment: diffusion, oxidation, tempering. Deposition: CVD, epitaxy, evaporation. lithography: definition of geometry. chemical attacks: dry and wet for the selective removal of material...

You are probably referring to the Dirac theory of antimatter (which is a relativistic quantum theory for fermions). According to this theory, an electron with negative energy can absorb electromagnetic energy (photons) and be in an excited state with positive energy, in this case you will see an...