Patent ID: 7674651
Filing Date: 2010-03-09
Classification: B23K,H01L,H05K

Abstract:
1. A method for mounting a semiconductor part on a circuit substrate, comprising: preparing the semiconductor part having a surface thereof provided with a plurality of stud-bumps; wherein the plurality of stud bumps have protrusion like tip ends; wherein the protrusion-like tip ends of the plurality of stud bumps come to a narrow point; preparing a solder substrate having a surface with a plurality of openings corresponding to respective ones of the plurality of stud bumps; coating the plurality of openings on the solder substrate with flux; filling the plurality of openings with solder; preparing the circuit substrate having a surface thereof provided with connecting pads corresponding to respective ones of the plurality of stud-bumps; positioning the semiconductor part above the solder substrate so that the corresponding openings and stud bumps are aligned; attaching the solder in the plurality of openings to the stud bumps by applying a force to the semiconductor part so the protrusion-like tip ends of the plurality of stud bumps penetrate the solder in the plurality of openings; separating the solder in the plurality of openings from the solder substrate; contacting the solder attached to the protrusion like tip ends of the stud-bumps with the corresponding connecting pads; and heating the solid solder attached to the protrusion like tip ends of the stud-bumps thereby achieving solder connection between respective ones of the stud bumps and the corresponding connecting pads.