led sapphire substrate
LED sapphire substrate is a key material in LED (Light Emitting Diode) manufacturing and is mainly used for growing Gallium Nitride (GaN) based epitaxial wafers. Sapphire (Al2O3) is extremely chemically stable and does not react with hydrogen even at high temperatures.
Sapphire consists of three oxygen atoms and two aluminum atoms bonded covalently with a hexagonal lattice structure.
led sapphire substrate
Sapphire has a wide optical transmission band, with good light transmission from the near-ultraviolet (190 nm) to the mid-infrared.
GaN is a direct bandgap semiconductor with high electron mobility and a high breakdown field, which makes it ideal for making high-brightness LEDs and laser diodes.
Sapphire substrate production technology is relatively mature and ensures the quality of the devices. Sapphire substrates dominate the LED industry due to their unique physical and chemical properties.
By growing GaN thin films on sapphire, high brightness and high efficiency LED devices can be manufactured. Sapphire is very hard, second only to diamond among natural materials, but it needs to be thinned and cut during the fabrication of LED devices
