Light emitting diode provided with patterned substrate

Abstract

The invention provides a light emitting diode provided with a patterned substrate. The substrate is divided into 5-8 concentric circular areas with the center as the center of a circle. The distance from the size of a pattern in a same circular area to the pattern is equal, and the distances of the sizes of the patterns in different circular areas to the patterns are increased sequentially from inside to outside. According to the invention, the residual stress in the epitaxial growth process can be reduced, the crystal defect is reduced, and the internal quantum efficiency is improved, so that, the wavelength uniformity of a chip is improved, the chip leakage is improved, and the brightness of the chip is improved. The technology has a more remarkable effect when a large growth substrate is used, so that the warpage of the light emitting diode can be reduced.

Description

technical field

[0001] The invention belongs to the technical field of semiconductor lighting, in particular to a light emitting diode with a pattern substrate. Background technique

[0002] Light-emitting diodes have the advantages of small size, high efficiency and long life, and are widely used in traffic indication, outdoor full-color display and other fields. In particular, the use of high-power light-emitting diodes may realize semiconductor solid-state lighting, which has caused a revolution in the history of human lighting, and has gradually become a research hotspot in the field of electronics.

[0003] The traditional chip manufacturing process is to prepare hundreds or even thousands of chips on a substrate at the same time. There is a certain distance between each chip. After these chips are prepared, they are separated by dicing and cutting. Subsequent encapsulation and other processes obtain light-emitting diodes. Generally, the chip structure of a light-emi...

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