A new method and processing sequence is provided for the creation of interconnect
bumps. A layer of passivation is deposited over a contact pad and patterned, creating
an opening in the layer of passivation that aligns with the contact pad. A layer
of UBM metal is deposited over the layer of passivation, the layer of UBM is overlying
the contact pad and limited to the immediate surroundings of the contact pad. The
central surface of the layer of UBM is selectively electroplated after which a
layer of solder or solder alloy is solder printed over the electroplated surface
of the layer of UBM. A solder flux or paste is applied over the surface of the
solder printed solder compound or solder alloy. Flowing of the solder or solder
alloy creates the solder bump of the invention.