Patent ID: 11894493
Assignee: OSRAM OLED GMBH
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method for producing a radiation-emitting semiconductor chip,
wherein the method comprises:
providing a semiconductor wafer comprising a plurality of semiconductor bodies;
applying a structured sacrificial layer on an underside of the semiconductor wafer;
producing a plurality of openings in the sacrificial layer;
filling the plurality of openings with a support material that is a metal material or a transparent conductive oxide to form supports;
applying a reflector layer on an outer side of the sacrificial layer and an outer side of the support material facing away from the semiconductor wafer; wherein the semiconductor wafer extends beyond the reflector layer in a lateral direction; wherein at least one cavity is arranged between the reflector and the semiconductor body; wherein when the at least one support of the supports is a metal material, then the reflector has the same material as the support material;
removing the sacrificial layer;
applying a supporting layer on an underside of the reflector facing away from the semiconductor body; wherein the supporting layer comprises a top side, a bottom side opposite the top side, and two sidewalls adjacent to the top side and the bottom side; wherein the top side faces the underside of the reflector;
applying a sealing layer on an outer side facing away from the semiconductor wafer, wherein the sealing layer is impermeable to the support material; wherein the sealing layer contacts a portion of the semiconductor wafer that extends beyond the reflector layer in the lateral direction; wherein the seal laterally surrounds the supporting layer and at least partially covers at least one side wall of the supporting layer; and
separating a plurality of semiconductor chips,
wherein the at least one support imparts the at least one cavity as a singular gap absent of solid material and located between the semiconductor body and the reflector, and wherein the support comprises columns or posts situated within the singular gap.