A vertical high-voltage light-emitting diode chip and its manufacturing method

Abstract

The invention provides a vertical high-voltage light emitting diode chip and a manufacturing method thereof. According to the invention, through the design of the vertical high-voltage light-emittingdiode chip, a sub-back electrode at a first chip region is perforated and is electrically connected with a conductive substrate through a bonding layer, so that the shading problem of the electrode ina horizontal electrode structure is avoided so as to ensure the large effective light-emitting area of the light-emitting diode chip; the high-voltage light emitting diode is of a vertical structure,so that the current expansion of the high-voltage light emitting diode chip is better, and the problem of transverse congestion of the current can be avoided so as to improve the current endurance capability; and the kth connecting electrode is connected with the first type of conductive layer of the kth chip region and the sub-back electrode in contact with the (k+1)th chip region through the convex table surface, so that the contact area of the metal and the first type semiconductor layer can be increased so as to reduce the contact resistance, and the current injection area can be increased so as to further reduce the working voltage of the high-voltage light-emitting diode chip.

Description

technical field [0001] The invention relates to the field of light-emitting diodes, in particular to a vertical high-voltage light-emitting diode chip and a manufacturing method thereof. Background technique [0002] Light Emitting Diode (English: Light Emitting Diode, referred to as: LED), as a very influential new product in the optoelectronics industry, has the characteristics of small size, long service life, colorful colors, low energy consumption, energy saving and environmental protection, and high safety. Another leap in the history of human lighting after incandescent lamps and fluorescent lamps is driving the upgrading of traditional lighting and display industries. It is widely used in lighting, display screens, signal lights, backlights, toys and other fields. [0003] Traditional light-emitting diodes generally work under direct current, and the voltage of a single LED chip is generally between 2-4V. In practical applications, especially in high-power light sou...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a vertical high-voltage light-emitting diode chip and its manufacturing method, so as to solve the technical problems faced by the high-voltage light-emitting diode chip in the prior art that the effective light-emitting area is small and it is easy to cause current congestion

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