Semiconductor light emitting device and method for manufacturing the same

Abstract

The invention discloses a semiconductor light-emitting device, which comprises a substitution substrate and a semiconductor extension laminated layer which is orderly connected with the substitution substrate through a metal layer, wherein the semiconductor extension laminated layer at least comprises a buffer layer, an N type layer, a luminous layer and a P type layer from the upper to the lower, a conductor is arranged in the N type layer, one end of the N type layer extents to expose the buffer layer, and an N type electrode is arranged, and a dielectric layer is arranged between the other end of the conductor and the metal layer. The lower end of the substitution substrate is quipped with a P type electrode, and the conductor, the P type layer and the metal layer are separated. The device of the invention sends light from the side of the N type layer, a transparency electrode does not need to use on the side of sending the light, thereby being capable of effectively improving the output power of the semiconductor device, and also being capable of reducing the thermal resistance of a light emitting diode device. Further, the invention also discloses a method for preparing a semiconductor light emitting diode.

Description

technical field [0001] The invention relates to a semiconductor light emitting device and a manufacturing method thereof. Background technique [0002] III-V nitride semiconductor materials are widely used in violet, blue, green and white light-emitting diodes, violet lasers for high-density optical storage, ultraviolet light detectors, and high-power high-frequency electronic devices. However, due to the lack of suitable substrates, current high-quality GaN-based material films are usually grown on sapphire or SiC substrates, but SiC substrates are relatively expensive and small in size. GaN-based material films are most commonly grown on sapphire substrates and have the most mature applications, but sapphire substrates have disadvantages such as high hardness, non-conductivity, and poor thermal conductivity. [0003] Due to the insulation of the sapphire substrate, the P and N electrodes of the light-emitting diode chip are in the form of coplanar electrodes. The P electr...

AI Technical Summary

Problems solved by technology

However, in order to reduce the voltage, the high-resistance buffer layer needs to be removed before making the N-electrode, which is easy to damage the chip and increase the process cost, and the N-electrode covered on the N-type layer will block part of the light, reducing the light extraction efficiency

Solving the problems of poor current expansion and poor heat dissipation of GaN-based LED chips on sapphire substrates is of great significance for the wide application of GaN-based LEDs on sapphire substrates

Images