LED electronic display will be the main part in application of LED lights market, and full-color display robust growth.

China LED electronic display started earlier, with a large number of strong manufacturers appearing in the market. At present, LED display are widely used in banks, securities, hospitals. On the demand of the LED , display ranked second after the LED indicator.

Led has been applied in the mobile phoned-based small –size LCD panel back-light market. The rapid development of the back-light market attributed to the continuous growth of mobile phone production. Particularly, in 2003, color mobile phones promote the rapid development of the white LED down lights market.

LED automotive application of led , in 2005, the scale of China LED automotive application market is 0.29 million RMB, including automotive lamp market of 0.21 million RMB. From the entire application of LED to see, automotive application market is still in infancy, and the size is very small LED as the car headlights mainly benefit from its lower power consumption, long life and the speed.

Indoor decorative lights market is LED emerging markets. By current control, the LED can be hundreds or even thousands of color change. In this stage that  pay much attention to the personalization, LED color diversification is better for the LED light market development. LED have begun to be made into small decorative lamps, decorative walls used in the hotel room. In 2005, the interior decorative lights market scale will reach 158 million yuan.

LED panel is also widely used in the landscape lighting market which is rapid development of market growth peaked in 2007. The landscape light market is mainly decorative lighting of streets, squares and public places and the driving force mainly comes from the government. By the 2008 Beijing Olympic Games and 2010 Shanghai World Expo,Beijing,Shanghai, held to accelerate the pace of landscape lighting, LED low power consumption in the enormous power of the landscape lighting market with strong market competitiveness. Currently, LED has been increasingly applied to the landscape lighting market. Chinese landscape lighting market size of over 700 million yuan in 2005, driven by these two main activities, the landscape lighting market will achieve a high growth rate of 72% in 2007.

The production of the wafer production process is very complicated-developed epitaxial wafers, the next at random in each wafer test nice, to met the requirements of good quality and other defective products (a large voltage deviation, the shorter the wavelength Ora longer length, etc.). Yield of the wafer must start doing electrodes(P pole, N pole), followed by epitaxial wafers, laser cutting and hundred percent sorting, depending on the voltage, wavelength, brightness fully automated sorting, which is formed application of led (led panel square pieces). Then visually, put a point defect or electrode wear, sorting out, these are behind the bulk crystal. The blue film is incompatible with normal delivery requirements of the chip, also naturally become edge or hair piece. Bad for the epitaxial wafer(there are some parameters do not meet the requirements), would not have to do film, just as electrode(P,N), also d not divide, it is currently on the market for application of led wafer(there is also some good stuff, such as square piece and so on).

Semiconductor manufacturers mainly use polishing Si(PW) and Si epitaxial film IC as raw material. Nineteen eighties early century starting using epitaxial films, it has a standard PW which does not have the certain electrical properties and eliminates many of the crystal growth and subsequent wafer processing of the surface and the near surface defect.

Historically, epitaxial films by Si manufacturer production and use, in the IC dosage is not big. It needs to be in single crystal Si film  deposited on the surface of a thin layer of single crystal Si. General epitaxial layer thickness is 2~20 μ m, and the Si substrate thickness of 610 μ m (150mm in diameter and 725 μ m (200mm).

LED lights epitaxial film – substrate material

The substrate material is the cornerstone of led lighting industrial technology development. Different substrates require different epitaxial growth techniques, chip processing technology and device packaging technology,  the substrate material determines the development path of application of led lighting technology. The substrate material of choice depends primarily on the following areas:

1, the structural characteristics is well, and the  similar crystal structure of epitaxial materials and substrates, the lattice constant mismatch is small, crystal properties, the defect density.

2. Interface features are well, which is benefit for the epitaxial materials into nuclear and adhesion.

3. cheap price.