DESCRIPTION (see animation below)

• Argon or other gas (dark pink balls) is introduced in a low pressure chamber
• Plasma is created by applying a high voltage between two electrodes (cathode and anode)
  • accelerated electrons (small blue balls) collide with argon atoms, creating argon ions (orange balls)
• Ions (orange balls) are accelerated by the applied bias, gaining high energy
• Ions (orange balls) bombard a source (cathode) and remove atoms (green balls)
• The removed atoms (green balls) travel to the substrate (anode)
• Atoms condense and form a film