Chip of light emitting diode and production method of chip

Abstract

The invention discloses a chip of a light emitting diode and a production method of the chip and belongs to the technical field of semiconductors. The chip comprises a sapphire substrate, an N-type GaN layer, a luminous layer, a P-type GaN layer and a transparent conducting thin film, wherein the N-type GaN layer, the luminous layer, the P-type GaN layer and the transparent conducting thin film are sequentially overlapped on the sapphire substrate; an N-type welding plate is arranged on the N-type GaN layer, a P-type welding plate is arranged on the P-type GaN layer, a P-type electrode wire is arranged on the transparent conducting thin film and extends outwards from the P-type welding plate, each of the P-type electrode wire, the transparent conducting thin film and the N-type GaN layer is provided with a passivation layer thereon, each of the N-type welding plate and the P-type welding plate is composed of a first material layer, the P-type electrode wire is composed of the first material layer and a second material layer, the first material layer comprises one or multiple of a Cr layer, an Al layer, a Ti layer, an Au layer, a Pt layer and an Ni layer, and the second material layer is a superlattice layer or TiW layer form by alternating laminating of an NiPt layer, the Ni layer and the Pt layer. By the arrangement, electro migration of the Al layer can be avoided.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a chip of a light emitting diode and a manufacturing method thereof. Background technique [0002] A light emitting diode (Light Emitting Diode, LED for short) is a semiconductor light emitting device, which is widely used in fields such as indicator lights and display screens. White light LED is the third generation of electric light source after incandescent lamps and fluorescent lamps. Its energy consumption is only one-eighth of that of incandescent lamps and one-half of that of fluorescent lamps. Its lifespan is as long as 100,000 hours. . [0003] Traditional LED chips generally use Al as the electrode material, which is suitable for most situations. However, under high current, the electrostatic electric field drives the electrons to move at high speed, and violently collides with Al atoms, resulting in a void in a local area of ​​the electrode line and an open cir...

AI Technical Summary

Problems solved by technology

[0003] Traditional LED chips generally use Al as the electrode material, which is suitable for most situations. However, under high current, the electrostatic electric field drives the electrons to move at high speed, and violently collides with Al atoms, resulting in a void in a local area of ​​the electrode line and an open circuit. electromigration

Images