Patent 7745258 was granted and assigned to Renesas Technology Corp on June, 2010 by the United States Patent and Trademark Office.
A manufacturing method of the semiconductor device including a step of forming solder balls on the circuit face of a mother chip, a step of making flip chip bonding of the daughter chip after the step of forming solder balls on the circuit face of the mother chip, and a step of making flip chip bonding of the mother chip on a circuit board using the solder balls.