Common Wafer Backgrind-related Failure Mechanisms:

  

Die Cracking/Chipping - occurrence of fracture or chip-out anywhere in the die. Common Causes in the context of Backgrind: incorrect backgrind parameters resulting in excessive stresses on the wafer
 
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Die Scratching - inducement of any mechanical damage on the die, as when an operator scratches a die with tweezers due to mishandling. Common Causes: insufficient operator training, disorderly workplace, use of improper tools

      

Die Metallization Smearing - depression or deformation of any metal line on the die surface. Common Causes: foreign materials on the backgrind tape, wafer mishandling

    

Die Corrosion - corrosion of the metallic parts of the die as a result of prolonged exposure to water during backgrinding

 

   

Front-End Assembly Links:  Wafer Backgrind Die Preparation Die Attach Wirebonding Die Overcoat

Back-End Assembly Links:  Molding Sealing Marking DTFS Leadfinish          

See Also:  IC ManufacturingAssembly Equipment

      

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