A kind of manufacturing method of vertical structure deep ultraviolet LED chip
A technology of LED chips and manufacturing methods, which is applied in the direction of semiconductor devices, electrical components, circuits, etc., can solve the problems of affecting TM polarized light propagation, long propagation path, and reduced light extraction efficiency, and achieve low-resistance ohmic contact and good ohmic contact. Effect of contact performance and improvement of light extraction efficiency
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[0064] A method for manufacturing a vertical structure deep ultraviolet LED chip is provided, and the specific steps are as follows:
[0065] (1) Put the cleaned sapphire substrate 1 into the MOCVD epitaxial growth device 1 at a temperature of 650°C, and grow a 35nm AlN nucleation layer 2 .
[0066] (2) At a temperature of 1100°C, continue to grow undoped Al 0.45 Ga 0.55 N buffer layer 3 with a thickness of 175-225nm, keep the temperature constant, and grow a layer of Si-doped n-Al 0.7 Ga 0.3 N layer 4 and n-Al 0.6 Ga 0.4 N layer 5 with a thickness of 2.5 μm and 0.5 μm and a doping concentration of 1.6×10 19 cm -3 .
[0067] (3) At a temperature of 760°C, grow Al for 5 cycles 0.4 Ga 0.6 N / Al 0.64 Ga 0.36 The N quantum well is used as the active layer 6, and the thickness of the quantum well layer is about 2.7nm.
[0068] (4) Deposit SiO at low temperature 2 or Si 3 N 4 Material electron blocking layer 7 (EBL), and then use the electron beam evaporation method to...
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