1results about How to "Reduce pixel pitch" patented technology

This invention discloses a vertically stacked uLED pixel structure, a monolithically integrated full-color uLED microdisplay chip suitable for flip-chip packaging, and its fabrication method. By vertically stacking blue, green, and red light-emitting units, full-color display is achieved through monolithic integration. The blue, green, and red light-emitting units share the same light-emitting surface, reducing the planar area occupied by the pixel units and improving display resolution. Simultaneously, shallow trenches filled with insulating dielectric are used to isolate adjacent pixel structures, further reducing pixel spacing and increasing pixel density. By placing the insulating dielectric layer on the surface of the red light-emitting unit, metal interconnect rewiring is implemented within the insulating dielectric layer, and the interconnects are led out from the insulating dielectric layer through lead-out structures electrically connected to the metal interconnects. This avoids the use of through-silicon vias (TSVs), simplifying the fabrication process, streamlining the pixel wiring structure, and optimizing the circuit layout.