A method of making an electronic package is described, wherein a substrate
is provided with a pattern of conductive pads and a portion of solder
positioned on selected ones of the pattern of copper pads. The solder is
then reflowed to form partial hemispherically shaped caps on the selected
copper pads. The partial hemispherically shaped caps are then coated with
a solder flux. A thin semiconductor chip with a pattern of conductive
elements, corresponding to partial hemispherically shaped capped pads, is
then positioned on the substrate so that the conductive elements of the
thin semiconductor chip substantially line up with the partial
hemispherically shaped capped pads of the substrate. The solder is then
heated to reflow temperature and an electrical couple is formed between
the thin semiconductor chip and the substrate. Since all the solder
necessary to make the electrical couple is positioned on the substrate,
it is possible to use a thin semiconductor chip in the electronic package
avoiding the problem presented by the handling and processing steps
associated with securing a bumped wafer substrate during the thinning
process and in subsequent processes of making the thinned semiconductor
chip from the bumped wafer, for example, the dicing step.