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Research on Fabrication Process of High Power LED

Author: HaoMeng
Tutor: LiPeiXian
School: Xi'an University of Electronic Science and Technology
Course: Materials Physics and Chemistry
Keywords: High-power LED The current spreading Electrode Back metallization Photonic crystal
CLC: TN312.8
Type: Master's thesis
Year: 2011
Downloads: 182
Quote: 0
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Abstract


Semiconductor lighting has the advantages of energy saving, environmental protection , long life, small size , can be used in a variety of color and white lighting in the area . High-power LED and conventional flux and versatile light source incandescent and fluorescent lamps , as well as a certain distance. Therefore, the high-power LED lighting in the area development , the key is to be luminous efficiency , luminous flux up to the present lighting sources and level . This paper first introduces high-power LED R \u0026 D background and progress , about the basic principles of high-power LED , emitting principle , die structure , and then on the evaluation of the performance of high-power LED indicators on the manufacture of high-power LED die process . This paper focuses on high-power LED internal current extension principle then solve current overcrowding , the electrode design principles to be followed . After two sets of territory are 1mm × 1mm and 1W high-power LED production for the device according to the process mapping software L - Edit , the same test conditions test results showed that the increase in the p-electrode branch , can be better achieved The current expansion of the role of TCL pre - process better than the general process . Then the finished die SEM testing and burn-in test , complete test results show that the surface morphology of the die , the light fades over time to achieve stability . Finally, in order to further improve the high-power LED luminous intensity to produce good die back metallization and photonic crystal experiments show that the the back metallization and the photonic crystal can effectively improve the luminous intensity of high-power LED to achieve good results .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Semiconductor technology > Semiconductor diode > Diodes: structure and performance > Light-emitting diodes
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