A method for manufacturing a single-chip white light LED based on a lithium aluminate substrate and a structure thereof

A lithium aluminate substrate, single-chip technology, applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of high cost and complex lighting of multi-crystal LEDs, and achieve high quantum efficiency and hardness, high luminous efficiency, cost reduction effect

Inactive Publication Date: 2017-11-07
SHANGHAI INSTITUTE OF TECHNOLOGY +1
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Problems solved by technology

[0004] The present invention provides a method for preparing a single-chip white light LED based on a lithium aluminate substrate, in order to solve the problem that traditional LED lamps need to

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  • A method for manufacturing a single-chip white light LED based on a lithium aluminate substrate and a structure thereof
  • A method for manufacturing a single-chip white light LED based on a lithium aluminate substrate and a structure thereof
  • A method for manufacturing a single-chip white light LED based on a lithium aluminate substrate and a structure thereof

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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. In conjunction with the following description, the advantages and characteristics of the present invention will be more clear. It should be noted that the accompanying drawings all use very simplified forms and inaccurate ratios. The purpose of this embodiment is explained for convenience and clarity.

[0026] In the present invention, a patterned lithium aluminate substrate is first prepared by a femtosecond laser etching process, and then a multi-quantum well InGaN / GaN LED is grown on the patterned substrate by MOCVD (metal organic chemical vapor deposition) method.

[0027] In this embodiment, the method for preparing a single-chip white light InGaN / GaN LED based on a lithium aluminate substrate includes the following steps:

[0028] 1. Preparation of patterned lithium aluminate substrate, such as figure 1 Shown:

[0029] 1. The pr...

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Abstract

The invention relates to a method for manufacturing a single-chip white light LED based on a lithium aluminate substrate. A femtosecond laser is used to etch nano-sized grooves according to regions in the lithium aluminate substrate to form patterned nanostructures. The grooves with different depths were etched in each region, and then InGaN / GaN quantum wells are grown on the structure. Different areas can emit different wavelengths of light, and the recombination of the light generates white light. No phosphor needs to be coated on the surface of the single-chip LED, and white light emission can be realized just by the luminescence of the single chip itself, so that the cost can be substantially reduced.

Description

technical field [0001] The invention relates to an LED lighting technology, in particular to a method for preparing a single-chip white light LED. Background technique [0002] White light-emitting diodes (LEDs) are widely used as a new generation of light sources in the fields of lighting, displays, and car lights because of their advantages such as energy saving, environmental protection, and long life. At present, commercial white LED light source packages mainly use blue LED chips covered with phosphor. This kind of blue light chip has a narrow emission band, and the short-wavelength blue light generated by the composite LED substrate and the long-wavelength yellow light emitted by the phosphor powder are used to obtain broadband white light emission. The encapsulation process is that silica gel mixed with fluorescent powder is bonded on the blue light chip. However, silica gel is an organic matter, its Tg (glass transition temperature) is only about 150°C and its ther...

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Application Information

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IPC IPC(8): H01L33/00H01L33/08H01L33/06H01L33/32
CPCH01L33/007H01L33/06H01L33/08H01L33/325
Inventor 邹军徐一超石明明李杨杨波波李文博吴文娟房永征
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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