A new process is provided which is an extension and improvement of present processing
for the creation of a solder bump. After the layers of Under Bump Metal and a layer
of solder metal have been created in patterned and etched format and overlying
the contact pad, following a conventional processing sequence, a layer of polyimide
is deposited. The solder flow is performed using the thickness of the deposited
layer of polyimide to control the height of the column underneath the reflown solder.