A semiconductor package structure for flip chip package includes at least
a patterned circuit layer and an insulating layer alternately stacking up
each other. The patterned layer includes a plurality of bump pads, and
the insulating layer includes a plurality of etching holes. The etching
holes and the bump pads are aligned, such that the bump pads are exposed
through the etching holes. A plurality of bumps is disposed on the active
surface of the chip, which can be obtained by stud bumping. The etching
holes are filled with solder paste, and the bumps of the chips penetrate
into the solder filled etching holes. Vibration obtained by mechanical
equipment, or ultrasonic equipment can be applied to assist the alignment
of the bumps to the corresponding bump pads. A reflow process is applied
to collapse the solder paste that fills the etching holes to form
electrical connection between the bumps and bump pads.