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Tantalum chip capacitors

The Manufacturing Process

  Ta PowderTa Wire    
     
  Pellet sintering   Hardens the Ta powder and wire into a pellet.
     
  Pellet sintering   Melts and then resolidifies the surface of the Ta metal at a high temperature in a vacuum.
     
  Forming   Uses anode oxidation in an oxygen acid solvent to create a thin oxide film on the surface of the Ta metal to serve as the dielectric.
     
  Thermal dissociation   Produces manganese dioxide (a solid electrolyte) through thermal dissociation of manganese nitrate.
     
  Cathode attachment   First a graphite and then a silver coating is applied to provide a cathode contact.
     
  Positive terminal weld   The tantalum wire is electrically welded to the positive terminal of the lead frame while in the negative contact the silver is connected with paste.
     
  Molding   Transfer molding using epoxy resin.
     
  Printing  
     
  Aging   Temperature and voltage is applied.
     
  Inspection    
     
 
Contact fabrication and taping