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LED Devices and Process Technologies

Modules & Sub Modules

Training Days

M1: LED device and technology

  • Semiconductor materials
  • Band-gap energy
  • MOCVD Process
  • Device structure
  • Epitaxial fabrication
  • Wafer fabrication
  • Electrical and Photometric Characteristics
  • Device efficiency
  • Light extraction techniques

3 days

M2: LED Color Science / Illumination Engineering

  • Photometric quantities

o   Candela, lumen,  nits, lux etc

  • Colorimetric quantities

o   Dominant  wavelength

o   (x,y) coordinates

  • Color Space

o   (x,y), (u,v) etc

  • Color Rendering Index
  • Color Mixing Theory

o    Understanding Tristimulus values

o   Mixing two colors

o   Mixing three or more colors

2 days

M3: LED Packaging – Design and Material Selection

  • LED Construction
  • Substrates – Leadframe, PCBs, et c
  • Die types
  • Encapsulants – Epoxy, Silicones, etc
  • Interconnects

o   Gold Wire

o   Die-attach

o   Eutetics

  • Through Hole LEDs
  • Surface Mount LEDs
  • High Power LEDs
  • Stress and Strain Analysis
  • Design Software
  • Reliability

2 days

M4: LED Applications

  • Indicators
  • Displays
  • Backlighting
  • Full Color Video Screen
  • Solid State Lighting/Illumination
  • LED Drivers – Design and Technologies
  • Thermal Management Considerations
  • Regulations and Standards for LED lamps and luminaire

o   US Energy Star

o   UL

o   Ingress Protection (IP) Rating

o   LM-78, 79 and 80.

2 days

M5: LED Manufacturing Processes

  • LED piece-parts
  • Processes for SMT, TH, and Power LEDs
  • Die-Attach
  • Wire-bond
  • Encapsulation
  • Singulation
  • Photomteric Tests
  • Reliability Tests
  • Tape and Reel
  • Shipping Tubes
  • ESD Precautions
  • Moisture Sensitivity Levels

3 days

M6: LED Optics, Design and Applications

  • Behaviour of Light
  • Reflection, Diffused and Specular
  • Refraction – Snell’s Law
  • Diffraction
  • Diffusion
  • Collimation
  • Filters and Filtering
  • Transmissivity of materials
  • Total Internal Reflection in LEDs
  • Optical Lenses
  • Radiation pattern of LEDs
  • Near Field and Far Field patterns
  • Street lamp beam patterns
  • LCD Backlighting lighting
  • Camera Flash Optics
  • Optical materials and properties
  • Factors affecting degradation of optical materials

3 days