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Micro-LEDs represent a paradigm shift in display technology, offering unparalleled brightness, contrast, and energy efficiency. We understand the intricate complexities of these miniature light sources, and our advanced analytical tools provide the precision needed to characterize and optimize their performance.

Our solutions delve into the core of micro-LED technology, enabling:

• Compositional Analysis: Precise determination of chemical composition and uniformity across the LED structure using techniques like Raman Spectroscopy.
• Optical Characterization: Detailed analysis of light emission properties, including wavelength, intensity, and efficiency, utilizing Photoluminescence (PL) spectroscopy.
• Nanoparticle Tracking: Characterization of the size and distribution of quantum dots or other nanoparticles used in micro-LED fabrication, ensuring optimal light emission.
• Defect Detection: Identification and quantification of defects and impurities that can impact device performance and lifespan.
• Surface Analysis: Examining the surface morphology and roughness of micro-LED layers, crucial for optimizing light extraction and device reliability.

By providing comprehensive analytical solutions, we empower researchers and manufacturers to push the boundaries of micro-LED technology, driving innovation in displays, lighting, and beyond.

Micro-LEDs are a revolutionary display technology that utilizes arrays of microscopic light-emitting diodes to create images. Unlike traditional LCDs that rely on backlighting, or OLEDs that use organic materials, micro-LEDs are self-emissive, meaning each individual LED pixel produces its own light.

Key characteristics of micro-LEDs include:

• Miniature Size: These LEDs are incredibly small, often measured in micrometers (µm), allowing for extremely high pixel densities and ultra-fine image resolution.
• High Brightness and Contrast: Micro-LEDs deliver exceptional brightness and contrast ratios, resulting in vibrant and lifelike images even in brightly lit environments.
• Energy Efficiency: Compared to other display technologies, micro-LEDs offer superior energy efficiency, translating to longer battery life in portable devices and reduced power consumption in large displays.
• Durability and Longevity: Micro-LEDs are made from inorganic materials, making them highly durable and resistant to degradation, resulting in longer device lifespans.
• Fast Response Times: Micro-LEDs have extremely fast response times, eliminating motion blur and enabling smooth video playback and immersive virtual reality experiences.
• Versatility: Micro-LEDs can be fabricated on flexible substrates, enabling the creation of curved and foldable displays.

These unique properties make micro-LEDs a promising technology for a wide range of applications, including:

• Smartwatches and smartphones
• Augmented reality (AR) and virtual reality (VR) headsets
• Large-format displays and televisions
• Automotive displays
• Advanced lighting solutions

Spectroscopic characterization and detection of yield-killing defects in micro-LED wafers

Emerging display technologies demand high brightness, low power consumption and longer lifetime. Arrays, of self-emitting, micron-sized LEDs or Micro-LED (µLED), are considered a strong contender to replace current OLED or LCD displays. The estimated growth of the micro-LED (µLED) market is USD 21 billion by 2028. Increasing demand for brighter & more power-efficient displays in automotive panels, smartwatches, mobile devices are some of the factors driving the growth of the segment.

Despite the huge potential, µLED technology is not yet fully commercialized. This is mainly due to the cost and challenges involved in the production process. For example, wearable devices, such as smart watches or augmented reality (AR) glasses, demand high resolution or high pixel density. To achieve high pixel density, the size of the µLEDs should go down to 3 µm or lower. At this length scale transferring the dies to the wafer and improving the yield is challenging, Low yields can drastically increase production costs.

With its unique set of accessories, the SMS family of systems enable any standard microscope to be fitted with a spectrometer and a detector, offering the ability to perform techniques such as:

• Raman
• Photoluminescence
• Lifetime (Time Resolved Photoluminescence)
• Reflectance
• Transmittance
• Electroluminescence
• Dark Field Scattering Spectroscopy
• Photocurrent