Patent ID: 11908841
Assignee: ELUX, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 22:
23. A method for fabricating a back emission micro light emitting diode (microLED), the method comprising:
providing a metalorganic chemical vapor deposition (MOCVD) structure comprising a first doped semiconductor overlying a growth substrate, with a top surface in a second plane, a multiple quantum well (MQW) layer overlying the first doped semiconductor having a top surface in a third plane, and a second doped semiconductor overlying the MQW layer and having a top surface in a fourth plane, where the first and second doped semiconductors are oppositely doped with n and p type dop ants;
etching the MOCVD structure to form a plurality of microLEDs;
selectively etching a MOCVD stack to form emitter areas by removing regions of the second doped semiconductor and MQW layer, and partially removing regions of the first doped semiconductor to the level of a first plane underlying the second plane;
conformally depositing an electrical insulator overlying the MOCVD stack;
selectively etching the electrical insulator overlying the etched regions of the MOCVD stack creating a perimeter via;
forming a perimeter electrode having a ring shape overlying the first via and having a substrate interface surface in at least a fifth plane;
etching an opening in the electrical insulator in the unetched regions of the MOCVD stack, creating a center via;
forming a center electrode overlying the center via, at least partially surrounded by the perimeter electrode, and having a substrate interface surface in a sixth plane; and,
separating the fabricated microLEDs from the growth substrate.