Bonding method for light-emitting diode (LED) chip and LED chip

A LED chip and bonding technology, applied in the direction of welding media, electrical components, welding/cutting media/materials, etc., can solve the problems of narrow process window and high manufacturing cost, achieve the best bond and interface, reduce the use of precious metals, reduce The effect of manufacturing costs

Active Publication Date: 2012-09-26
HANGZHOU SILAN AZURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a LED chip bonding method and LED chip to solve the problems of high manufacturing cost or narrow process window in the chip bonding method of the prior art

Method used

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  • Bonding method for light-emitting diode (LED) chip and LED chip
  • Bonding method for light-emitting diode (LED) chip and LED chip
  • Bonding method for light-emitting diode (LED) chip and LED chip

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Embodiment 1

[0050] Please refer to Figure 2a~2e , Which is a schematic cross-sectional view of the device in the LED chip bonding method of the first embodiment of the present invention.

[0051] First, like Figure 2a As shown, a substrate 20 is provided on which an epitaxial layer 20a, an ohmic contact layer 20b, a first adhesive layer 20c, a first solder barrier layer 20d, and a first bonding layer 20e are sequentially formed on the substrate 20. Preferably, the material of the substrate 20 is GaN, the epitaxial layer 20a is a GaN-based epitaxial layer, and the epitaxial layer 20a is formed by an epitaxial process. In other embodiments of the present invention, the material of the substrate 20 may also be silicon, silicon carbide, GaAs, AlN or ZnO.

[0052] In this embodiment, the material of the first adhesive layer 20c is Ti, and the thickness thereof is 30 nm to 70 nm. Preferably, the thickness of the first adhesive layer 20c is 50 nm. The material of the first solder barrier layer 20d...

Embodiment 2

[0069] Please refer to image 3 , Which is a schematic cross-sectional view of the device in the LED chip bonding method of the second embodiment of the present invention.

[0070] Such as image 3 As shown, in this embodiment, a substrate 30 is provided, and an epitaxial layer 30a, an ohmic contact layer 30b, a mirror layer 30c, a mirror barrier layer 30d, and a first adhesive layer 30e are sequentially formed on the substrate 30. , The first solder barrier layer 30f and the first bonding layer 30g. Wherein, the material of the first bonding layer 30e is Ti, and its thickness is preferably 50nm; the material of the first brazing filler metal barrier layer 30f is TiW, and the thickness is preferably 200nm; the thickness of the first bonding layer 30g The material is Ni, and its thickness is preferably 1 micron.

[0071] Please continue to refer image 3 , A substrate 31 is provided on which a second adhesive layer 31a, a second solder barrier layer 31b, a second bonding layer 31c,...

Embodiment 3

[0076] Please refer to Figure 4 , Which is a schematic cross-sectional view of the device in the LED chip bonding method of the third embodiment of the present invention.

[0077] Such as Figure 4 As shown, in this embodiment, a substrate 40 is provided, and an epitaxial layer 40a, an ohmic contact layer 40b, a mirror layer 40c, a mirror barrier layer 40d, and a first bonding layer 40e are sequentially formed on the substrate 40. , The first solder barrier layer 40f, the first bonding layer 40g, and the first solder layer 42. Wherein, the material of the first bonding layer 40e is Ti, and its thickness is preferably 50nm; the material of the first brazing filler metal barrier layer 40f is TiW, and the thickness is preferably 200nm; the thickness of the first bonding layer 40g The material is Ni, and its thickness is preferably 1 micron; the material of the first solder layer 42 is Sn x Cu 1-x , The thickness is preferably 250 nm.

[0078] Please continue to refer Figure 4 , A s...

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Abstract

The invention provides a bonding method for a light-emitting diode (LED) chip and the LED chip. The bonding method for the LED chip comprises the following steps of: providing a substrate, wherein an epitaxial layer, an ohmic contact layer, a first adhesive layer, a first brazing filler metal barrier layer and a first bonding layer are sequentially formed on the substrate; providing a base plate, wherein a second adhesive layer, a second brazing filler metal barrier layer and a second bonding layer are sequentially formed on the base plate; forming a brazing filler metal layer on the surface of the first bonding layer and/or the surface of the second bonding layer, wherein the brazing filler metal layer is made of metal or an alloy; and attaching the substrate to the base plate by taking the surface of the brazing filler metal layer as an attachment surface until the brazing filler metal layer is completely diffused to the first and second bonding layers. Au-Au solid-phase diffusion bonding or Au-Sn eutectic bonding is avoided, so that the use of noble metal is avoided or reduced, and the manufacture cost of the LED chip is lowered.

Description

Technical field [0001] The invention relates to the technical field of semiconductor optoelectronic device manufacturing, in particular to an LED chip bonding method and an LED chip. Background technique [0002] In the context of the current rise in global energy shortage concerns, energy conservation is an important issue facing us in the future. In the field of lighting, the application of LED (Light Emitting Diode, light-emitting diode) is attracting the attention of the world. As a new type of green light source product, LED is bound to be the trend of future development. The 21st century will enter Represents the era of new lighting sources. [0003] In LED applications, the manufacture of LED chips is one of the most critical steps, and chip bonding is a preferred process in the LED chip manufacturing process. Chip bonding mainly refers to: growing corresponding metal layers on two substrates / substrates, and then bonding the metal layers grown on the two substrates togethe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00B23K35/26
Inventor 封飞飞张昊翔金豫浙万远涛李东昇江忠永
Owner HANGZHOU SILAN AZURE
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