Sapphire is an important basic material in modern industry, and its main component is aluminum oxide. It has the characteristics of high strength, high hardness, good transparency, and good dielectric properties. It is a material that combines excellent optical, physical, and chemical properties. Unique crystal materials are widely used in fields such as LED, consumer electronics, instrumentation, optical windows, etc. In the consumer electronics market, sapphire lenses have been widely used in terminals such as mobile phone cameras, buttons, and smart watch screens due to their outstanding advantages in infrared transparency and scratch resistance, and continue to expand.

With the arrival of the 5G high-frequency communication era, the consumer electronics industry chain has entered a new track. The screen is diverse in specifications and types from small to large. The mobile phone case and smart wearable market, as key layouts in the 5G era, will bring growth momentum and space to the blue ocean of the sapphire industry in the future; Secondly, the revolution in protective materials for consumer electronics products has quietly begun. The development of 5G and wireless charging has put forward higher requirements for signal transmission, and "de metalization" has become the trend. Sapphire lenses have the characteristics of high electromagnetic wave transmittance, high insulation, and high thermal conductivity. Compared with glass and ceramics, their performance is more in line with the needs of the Internet of Things era.

Sapphire, as a new material, is not a mineral gemstone extracted from nature, but a transparent crystal artificially synthesized by placing alumina powder in special equipment under high temperature and vacuum environment. This process is called 'crystal growth'. The current mainstream crystal production methods include bubble growth method and heat exchange method. The shape of sapphire crystal ingots produced by bubble forming method is relatively irregular, and the products are mostly used for LED substrates. The crystal shape is regular and the volume is large using heat exchange method, which has a high degree of automation and stable production yield. It can produce sapphire lenses for mobile phones over 5 inches, which is a method suitable for the needs of the consumer electronics industry such as mobile phones and can be mass-produced on a large scale.