Patent ID: 11901211
Assignee: FURUKAWA ELECTRIC CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  H  B  Y | IPC B  C  H

Claim 1:
2. A method of producing semiconductor chips, comprising:
(a) a step of laminating a surface protective tape on a surface of a wafer formed with a circuit-pattern,
(b) a back grind step of grinding a back surface of the wafer,
(c) a step of laminating the adhesive layer of the semiconductor-processing tape according to claim 1 on the back surface of the wafer when the wafer is being heated,
(d) a step of separating the surface protective tape from the surface of the wafer formed with the circuit-pattern,
(e) a step of irradiating a laser light to a dividing line of the wafer, to form a region modified by multiphoton absorption inside the wafer,
(f) an expansion step of expanding the semiconductor-processing tape, thereby dividing the wafer and the adhesive layer along the dividing line, to obtain a plurality of semiconductor chips on each of which the adhesive layer has been laminated,
(g) a step of maintaining a space between the semiconductor chips in the semiconductor-processing tape after the expansion step, by subjecting a portion of said semiconductor-processing tape which does not overlap with the semiconductor chips, to heat shrinkage, and thereby to eliminate laxation caused by the expansion step, and
(h) a step of picking up the semiconductor chips on each of which the adhesive layer has been laminated, from the removable adhesive layer of the semiconductor-processing tape, while maintaining the space between the semiconductor chips.