Скачать или смотреть How SMD LED Chips Mass Production in China High End Manufacturing By MPE Ep=004

Introduction: The heart of modern lighting
Start with a hook that emphasizes the ubiquitous nature of LED technology, from smartphones to billboards. Introduce the video as an exclusive look inside the high-end Chinese manufacturing facilities that produce the tiny but powerful Surface Mount Device (SMD) LED chips.
Chapter 1: The building blocks—Wafer fabrication
Growing the crystal: Show the process of growing large, cylindrical crystal ingots (boules) from high-purity semiconductor materials like gallium nitride (GaN) under high-pressure, high-temperature conditions.
Slicing with precision: Use high-speed shots to show the ingots being sliced into extremely thin wafers with diamond saws.
Layering with epitaxy: Explain how additional layers of semiconductor crystal are grown on the wafer surface through a process called liquid-phase epitaxy (LPE) to define the LED's color and efficiency.
Chapter 2: The micro-manufacturing process
Micro-patterning and etching: Walk through the photolithography process, where intricate patterns are created on the wafer's surface. Explain how chemical etching removes material to form the LED's structure.
Doping for conductivity: Detail the process of introducing impurities to the semiconductor to control its electrical properties, a crucial step for the LED's function.
Adding metal contacts: Show metal electrodes being deposited onto the wafer to provide the necessary electrical connections.
Cutting the die: Illustrate the laser or mechanical cutting process that scribes and separates the wafer into thousands of individual LED chips, or "dies".
Chapter 3: Assembly at superhuman speeds
Automated die bonding: Showcase robotic arms picking and placing the tiny LED dies onto a substrate or circuit board with incredible speed and accuracy.
Micro-scale wire bonding: Capture the intricate process of automated wire bonding, where fine gold wires connect the chip's electrodes to the leads.
Encapsulation and phosphors: Explain the process of encapsulating the chip in a protective epoxy or silicone resin. For white LEDs, show the application of a phosphor coating that converts blue light into a broad white light spectrum.
Chapter 4: The final test and package
Automated testing and binning: Demonstrate the high-speed testing machines that measure each LED's brightness, color temperature, and voltage. Highlight how air jets sort the chips into different bins based on their performance characteristics.
Tape and reel packaging: Show the LEDs being loaded into standard tape and reel packaging for shipping to electronics manufacturers.
Quality control and aging: Explain the quality assurance checks and aging tests that ensure long-term reliability and performance.
Conclusion: The future of light
End by reflecting on how these high-tech manufacturing processes in China are driving innovation, increasing efficiency, and lowering costs, making LED technology more accessible worldwide.