Flip LED chip and production process thereof

Abstract

The flip LED chip comprises a substrate, an n-pole conductive plate and a p-pole conductive plate are embedded in the top of the substrate, a first positioning frame is welded to the top of the n-pole conductive plate, a second positioning frame is welded to the top of the p-pole conductive plate, a p-type gallium nitride layer is arranged on the top of the substrate, an n-type gallium nitride layer is arranged on the outer wall of the bottom of the p-type gallium nitride layer, and the n-type gallium nitride layer is arranged on the outer wall of the bottom of the p-type gallium nitride layer. An n electrode is arranged on the outer wall of the bottom of the n-type gallium nitride layer, the n-type gallium nitride layer is located in the first positioning frame, and welding materials are arranged in the first positioning frame and the second positioning frame. According to the flip LED chip, the welding materials are added into the positioning frame I and the positioning frame II, and the welding materials are welded with the n-pole conductive plate and the p-pole conductive plate after being melted, so that the electrode contact surface of the flip LED chip is increased, and the heat conduction effect of the flip LED chip is improved.

Description

technical field [0001] The invention relates to the technical field of LED chips, in particular to a flip-chip LED chip and a production process thereof. Background technique [0002] A light-emitting diode is a semiconductor solid-state light-emitting device, which is made using the electroluminescence principle of a semiconductor PN junction. LED devices have good optoelectronic properties such as low turn-on voltage, small size, fast response, good stability, long life, and no pollution. Therefore, they are widely used in outdoor and indoor lighting, backlight, display, traffic indication and other fields. Generally speaking, LED chips are divided into three types: horizontal structure (front-mounted chip), vertical structure (vertical structure chip) and flip-chip structure (flip-chip). Among them, the P and N electrode layers in the flip-chip LED chip are located in On the same side of the light-emitting region, the light emitted by the active layer in the LED chip mai...

AI Technical Summary

Problems solved by technology

[0005] When the flip-chip LED chip in the prior art is soldered, its contact area is small, resulting in poor thermal conductivity of the flip-chip LED chip, and prone to virtual soldering, which makes the flip-chip LED chip easy to fall off from the substrate

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