Patent ID: 7888176
Filing Date: 2011-02-15
Classification: H01L

Abstract:
1. A method of producing an assembly having two stacked dice, the method comprising: fabricating a first wafer having a plurality of first dice; fabricating a second wafer having a plurality of second dice; applying a first solder bump to each of an at least one second die front connection pad disposed on a front surface of each second die; dicing the second wafer into a plurality of discrete second dice; mounting a predetermined quantity of the discrete second dice onto the first wafer such that each second die front connection pad aligns with an at least one first die back connection pad disposed upon a back surface of each first die; melting each first solder bump; applying a second solder bump to each of an at least one first die front connection pad disposed upon a front surface of each first die; and dicing the first wafer into a plurality of discrete first dice having a respective discrete second die coupled to each discrete first die, wherein the first solder bump and the second solder bump have different melting temperatures.