Systems and methods for bonding semiconductor devices

A method for manufacturing semiconductor packages, comprising:

• bonding a plurality of semiconductor dies to a first wafer on their respective first sides;
• bonding the plurality of semiconductor dies to a second wafer on their respective second sides at an elevated temperature;
• decoupling the first wafer from the plurality of semiconductor dies;
• forming, after the step of bonding the plurality of semiconductor dies to the second wafer and the step of decoupling the first wafer from the plurality of semiconductor dies, a plurality of first connecters in electrical contact with the plurality of semiconductor dies that are placed on the second wafer;
• and
• bonding, at a temperature lower than the elevated temperature, the plurality of semiconductor dies to a third wafer by connecting the plurality of first connecters to a plurality of second connecters disposed on the third wafer, respectively.

A method for manufacturing semiconductor packages, comprising:

• preparing a plurality of semiconductor dies, each of the plurality of semiconductor dies, on its first side, including a plurality of metallization layers, a dielectric layer completely overlaying a topmost one of the metallization layers, a stop layer overlaying the dielectric layer, and a laser liftoff layer overlaying the stop layer;
• bonding the plurality of semiconductor dies to a first wafer with the respective first sides;
• bonding the plurality of semiconductor dies to a second wafer with their respective second sides at an elevated temperature;
• decoupling, based on causing thermochemical dissociation of the laser liftoff layer of each of the plurality of semiconductor dies, the first wafer from the plurality of semiconductor dies;
• forming, after the step of bonding the plurality of semiconductor dies to the second wafer and the step of decoupling the first wafer from the plurality of semiconductor dies, a plurality of vias extending through the dielectric layers to be in contact with the topmost metallization layers, respectively;
• forming a plurality of first connecters in contact with the plurality of vias, respectively;
• and
• bonding, at a temperature lower than the elevated temperature, the plurality of semiconductor dies to a third wafer by connecting the plurality of first connecters to a plurality of second connecters disposed on the third wafer, respectively.