Plasma

( A ) Upper Region

  • Plasma density is lesser as indicate by pale UV light, because there are much more positive charge ions than negative charge electrons, reaction is slow.

( B ) High Plasma

  • Region where the most visible UV light emitted by the fast ion reaction. There is approximately equal numbers of negative charge ions and positive charge electrons. Ions gain more acceleration as it approach near the Sheath.

( C ) Lower Region (SHEATH)

  • This region is called the SHEATH where there is strong electric field in front or on top of the power electrode,
  • Sheaths are of critical importance for plasma etching, since positive ions are accelerated toward the surface when entering a sheath. The accelerated ions bombard the surface with energies that are much greater than thermal energies.

MAGNETIC RADIATION BELT

  • Geomagnetic fields lines form by RF electric fields, the plasma is acted upon by electric and magnetic fields created within the plasma itself through localized charge concentration and electric currents that result from the differential motion of the ions and electrons.
  • This is one big phenomena that influence the direction of charge particles.