Method of debonding work-carrier pair with thin devices
Disclosed is a thin subject assisted debonding method for separating temporarily bonded workpiece-carrier pair. The thin subject can be a thin wire, or thin filament, or thin blade. The thin subject can be applied between the workpiece and carrier pair in association with laser debonding or mechanical debonding to provide well controlled and targeted wedging function to the delaminating temporary adhesive and its adjacent substrate to which it is separating from. The workpiece can be a semiconductor wafer that has been thinned and processed, and the carrier can be a semiconductor non-device wafer or any other rigid substrate such as a glass wafer or panel. The application of a thin subject between the workpiece and carrier during debonding provides the advantage of high throughput and low defect rate.
1. A method of manufacturing a semiconductor device, comprising:
providing a first substrate bonded to a second substrate by an adhesive material forming an adhesive layer therebetween, wherein the first substrate includes a semiconductor wafer workpiece with at least one integrated circuit disposed on a surface thereof, wherein the adhesive layer comprises a laser decomposable layer;
applying an electromagnetic energy to the laser decomposable layer to decompose the laser decomposable layer; and
while applying the electromagnetic energy, actuating an external device into direct physical contact with the entire adhesive layer along a direction substantially parallel to the surface of the first substrate and concomitantly moving the external device in a reciprocating saw-like motion to facilitate separation of the first substrate from the second substrate,
wherein the external device is a polymer wire having a thickness of less than 1 mm.
2. The method of claim 1 , further comprising:
exposing the first substrate and the second substrate to a chemical solvent operable to dissolve the adhesive material.
3. The method of claim 1 , wherein the polymer wire includes a transverse section having at least one of a triangular, circular, oval, rectangular, and square shape.
4. The method of claim 1 , wherein the polymer wire includes a transverse section having a saw-tooth shape.
5. The method of claim 1 , wherein the polymer wire includes a dental floss.