Patent ID: 8028403

Claim:
A process for interconnecting at least three substrates comprising the steps of: forming a first conductive pad on a top surface of a first substrate, a second conductive pad on a bottom surface of a second substrate, a third conductive pad on a top surface of the second substrate and a fourth conductive pad on a bottom surface of a third substrate; forming a first solder bump on at least one of the first and second conductive pads and a second solder bump on at least one of the third and fourth conductive pads; positioning a first adhesive film between the top surface of the first substrate and the bottom surface of the second substrate and a second adhesive film between the top surface of the second substrate and the bottom surface of the third substrate, the first adhesive film having an aperture substantially located between the first and second conductive pads and the second adhesive film having an aperture substantially located between the third and fourth conductive pads; pressing the first and second substrates together to adhere at least a portion of the top surface of the first substrate to at least a portion of the bottom surface of the second substrate and where the first solder bump occupies at least a portion of the aperture in the first adhesive film; and pressing the second and third substrates together to adhere at least a portion of the top surface of the second substrate to at least a portion of the bottom surface of the third substrate and where the second solder bump occupies at least a portion of the aperture in the second adhesive film.