Patent ID: 11955505
Assignee: nan
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A micro-LED display chip, comprising:
a substrate supporting an array of pixel drivers; and
an array of single pixel multi-color micro LED devices, each single pixel multi-color micro LED device of the array of single pixel multi-color micro LED devices being electrically connected to a corresponding pixel driver of the array of pixel drivers,
wherein:
each single pixel multi-color micro LED device comprises a first LED structure layer stacked on top of the substrate and the array of pixel drivers, a second LED structure layer stacked on top of the first LED structure layer, and a metal bonding layer between the substrate and the first LED structure layer;
within each single pixel multi-color micro LED device, each of the first and second LED structure layers comprises an epitaxial structure forming an LED, a lower conductive layer electrically connected to a bottom of the LED, and an upper transparent conductive layer electrically connected to a top of the LED,
within each single pixel multi-color micro LED device, the first LED structure layer and the second LED structure layer substantially overlap laterally with one another to form a light path that combines light emitted from the first LED structure layer and the second LED structure layer;
within each single pixel multi-color micro LED device, the lower conductive layer of the first LED structure layer and the lower conductive layer of the second LED structure layer are electrically connected to a pixel driver corresponding to the single pixel multi-color micro LED device through an electrode metal contact pad layer and the metal bonding layer, wherein the electrode metal contact pad layer is in direct contact with the lower conductive layer of the first LED structure layer and the lower conductive layer of the second LED structure;
upper transparent conductive layers of first LED structure layers of a plurality of single pixel multi-color micro LED devices of the array of single pixel multi-color micro LED devices are electrically connected to a first common electrode; and
upper transparent conductive layers of second LED structure layers of the plurality of single pixel multi-color micro LED devices are electrically connected to a second common electrode.