Manufacturing method for color micro-light-emitting diode array substrate

Abstract

The invention provides a manufacturing method for a color micro-light-emitting diode array substrate, and the method comprises the steps: manufacturing a plurality of color micro-light-emitting diode arrays which are respectively formed by a plurality of single-color micro-light-emitting diode arrays with different colors on a receiving substrate, wherein the manufacturing of the single-color micro-light-emitting diode array with one color is combined with the binding technology and the laser falling-off technology; selectively forming a metal electrode on the micro-light-emitting diode in a specific region on a feeding substrate, selectively binding the micro-light-emitting diode in the specific region on the receiving substrate, and selectively carrying out laser irradiation of the micro-light-emitting diode in the specific region, thereby enabling the micro-light-emitting diode in the specific region to be separated from the feeding substrate through binding and laser annealing; forming the single-color micro-light-emitting diode arrays on the receiving substrate, thereby achieving the manufacturing of the single-color micro-light-emitting diode arrays with different colors on the receiving substrate. Moreover, the manufacturing method is simple and easy.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for manufacturing a color micro-light emitting diode array substrate. Background technique [0002] Micro LED (Micro LED) is a device with a size between several microns and hundreds of microns. Because it is much smaller than ordinary LEDs, it is possible to use a single LED as a pixel (Pixel) for display. A Micro LED display is a display that uses a high-density Micro LED array as a display pixel array to achieve image display. Like a large-scale outdoor LED display, each pixel can be addressed and individually driven to light up. It can be regarded as a A reduced version of the outdoor LED display, which reduces the pixel distance from millimeters to microns. Micro LED displays are self-luminous displays like Organic Light-Emitting Diode (OLED) displays, but Micro LED displays are compared to OLED displays also have the advantages of better material stability, longe...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the micro-transfer printing using the transfer head, a chip bonding (Chip Bonding) technology has been proposed in the field to transfer the Micro LED array, that is, the supply substrate of the Micro LED is directly aligned with the receiving substrate And bonding, saving the intermediate steps of the transfer head, but it is difficult to realize the colorization of the LED display array, because most of the Micro LEDs grown on a supply substrate are of a single color, so that the Micro LED array bound on the receiving substrate is Monochrome, and then only monochrome display, such as blue display, but color display cannot be realized by the arrangement of multi-color Micro LEDs, such as the staggered arrangement of red, green and blue (R / G / B) three-color Micro LEDs

In addition, the size of the supply substrate is still mainly 2-4 inches, which limits the number of Micro LEDs transferred at one time.

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