Miniature LED chip, preparation method thereof and eutectic structure comprising miniature LED chip

Abstract

The invention discloses a miniature LED chip, a preparation method thereof and a eutectic structure comprising the miniature LED chip, the surface of a P-type gallium nitride layer (5) of the miniature LED chip is provided with a first groove (6) and a second groove (7) which are formed in an inward concave mode and extend into an N-type gallium nitride layer (2), the periphery of the first groove (6) is provided with a first protrusion (8), the inner ring of the first groove (6) is provided with a plurality of second protrusions (9), and the second protrusions (9) are arranged on the periphery of the P-type gallium nitride layer (5). The plurality of second bulges (9) are spaced through second grooves (7); and the N electrode layer (13) on the first bulge (8) and the P electrode layer (14) on the second bulge (9) have the same horizontal height. According to the invention, the negative electrode of the LED is connected to the position on the same plane as the positive electrode, and the gap between the LED luminous points is filled with the anti-infrared material which can form a retaining wall between the LEDs, so that the LEDs are prevented from being deformed and even collapsed due to heating during eutectic, and the light of the LED luminous points on the two sides is also prevented from being blended.

Description

technical field [0001] The patent of the present invention belongs to the field of micro-LED technology, and specifically relates to a micro-LED chip, a preparation method thereof, and a eutectic structure containing it. Background technique [0002] Micro LED display technology refers to a display technology that uses self-luminous micron-scale LEDs as light-emitting pixel units and assembles them on the drive panel to form a high-density LED array. Due to the small size of the micro LED chip, high integration and self-illumination, compared with LCD and OLED in terms of display, it has greater brightness, resolution, contrast, energy consumption, service life, response speed and thermal stability. The advantages. [0003] Micro LED applications will expand from flat panel display to AR / VR / MR, space display, flexible transparent display, wearable / implantable optoelectronic devices, optical communication / optical interconnection, medical detection, smart car lights and many ...

AI Technical Summary

Problems solved by technology

[0009] This invention is to solve the problem that the positive and negative electrodes are not on the same plane when the Micro LED is eutectic. Since our LED structure adopts a common negative electrode structure, the LED negative electrode film layer and the LED positive electrode film layer are not on the same plane, which leads to the negative electrode and the LED positive electrode film layer. The problem that the positive metal eutectic point is not on the same plane, the eutectic effect cannot be achieved due to this problem during eutectic

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