Micro-led and chip with dummy light-emitting mesa

Abstract

A micro-LED having a dummy light-emitting mesa comprises a plurality of light-emitting mesas and a passivation layer is provided. Each of the light-emitting mesas comprises a bottom transparent conductive layer, a first epitaxial layer, a light-emitting layer, and a second epitaxial layer. The first epitaxial layer is disposed between the bottom transparent conductive layer and the light-emitting layer. The light-emitting layer is disposed between the first epitaxial layer and the second epitaxial layer and is configured to emit light. The second epitaxial layer is disposed on the light-emitting layer, wherein an area of the light-emitting mesa near an upper surface of the second epitaxial layer is greater than an area of the light-emitting mesa near a lower surface of the first epitaxial layer. The passivation layer covers the lower surface and a side surface of the light-emitting mesa, wherein the light-emitting mesas include a first light-emitting mesa and a dummy light-emitting mesa, wherein the passivation layer on the first light-emitting mesa has a notch to expose the bottom transparent conductive layer, and the passivation layer on the dummy light-emitting mesa does not have a notch.

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