Patent ID: 8689437

Claim:
A method for forming an integrated circuit assembly, the method comprising the steps of: forming a first die on a first substrate; forming first solder bumps on the first die; forming a first structure comprising the first substrate, the first die, the first solder bumps, a first flux and a first substratum, wherein the first die is placed upon the first substratum, wherein the first solder bumps are between the first die and the first substratum, and wherein the first flux holds the first die substantially flat and onto the first substratum; separating the first substrate from the first die after forming the first structure; forming second solder bumps on a second die; and forming a second structure comprising the second die, the second solder bumps, a second flux, and a second substratum, wherein the second die is placed upon the second substratum, wherein the second solder bumps are between the second die and the second substratum, and wherein the first substratum comprises the second die.