Southern Taiwan University of Science and Technology 科技英文 科技英文 Light Emitting Diodes Development and Application 組別：第 5 組組員：陳郅升 陳勁華 劉庭劭 黃信憲 陳俊安

Southern Taiwan University of Science and Technology History of LEDs LEDs production process Materials and Evolution Application of LEDs 2

Southern Taiwan University of Science and Technology History of LEDs 1.In the early 20th century,the first red LED was invented by GaAsP. 2.In the 20th century,the American RCA research team found that GaN can produce LEDs,but the efficiency can not be improved. 3.In 1993,the Japan's Nichia Chemical Company solve the problem of efficiency and invented blue LEDs. 4.In the last 20 th century ， white LEDs was invented. 3

Southern Taiwan University of Science and Technology LEDs production process 4

Southern Taiwan University of Science and Technology LEDs production process Bulk Substrate Crystal Growth & Machining Epitaxial Deposition of Light- Eimitting Diodes Wafer Fabrication Die Fabrication Final Product Assembly 5

Southern Taiwan University of Science and Technology Chip process for LEDs 6 Epitaxy WaferClean Thermal annealing PhotolithographyDry etchingMetal deposition Chip on wafer

Southern Taiwan University of Science and Technology Materials and Evolution 7

Southern Taiwan University of Science and Technology Materials 8 Wavelength : 760~610 nm AlGaAs 、 GaAsP 、 AlGalnP Wavelength : 590 ~ 570 nm GaAsP 、 AlGalnP Wavelength : 570 ~ 500 nm lnGaN 、 GaP 、 AlGalnP 、 AlGaP Wavelength : 500 ~ 450 nm lnGaN 、 SiC

Southern Taiwan University of Science and Technology 9

Evolution of LED 10

Southern Taiwan University of Science and Technology Application of LEDs 11

Southern Taiwan University of Science and Technology LED BLU market by application 12 Data source ： Display Search

Southern Taiwan University of Science and Technology LED in NB market 13 資料來源： Display Search

Southern Taiwan University of Science and Technology 14

Southern Taiwan University of Science and Technology Conclusion In recent years,more and more LED use in notebook computers backlight. LED lighting devices in the future will replace the fluorescent. In the future,LEDs will be more important. 15

Southern Taiwan University of Science and Technology References &Part=magazine &Part=magazine %E5%9B%9E%E9%A1%A7led%E7%94%A2%E6%A5%AD%E7%99%BC% E5%B1%95%E6%AD%B7%E7%A8%8B%E7%85%A7%E6%98%8E%E6%8 A%80%E8%A1%93%E9%9C%80%E8%88%87%E7%90%86 %E5%9B%9E%E9%A1%A7led%E7%94%A2%E6%A5%AD%E7%99%BC% E5%B1%95%E6%AD%B7%E7%A8%8B%E7%85%A7%E6%98%8E%E6%8 A%80%E8%A1%93%E9%9C%80%E8%88%87%E7%90% led%E8%A3%BD%E7%A8%8B led%E8%A3%BD%E7%A8%8B CEFD482577A5002C6D8D/$FILE/ pdf 4CEFD482577A5002C6D8D/$FILE/ pdf

Southern Taiwan University of Science and Technology Thanks for your attention ! 17