Crystals (1) natural condensation, free from outside interference and the formation of regular geometric shape has a neat Shandong days Yue silicon carbide material, from the range of the crystal. (2) has a fixed melting point of the crystal, in the melting process, the temperature of the crystal remains unchanged. (3) crystal has anisotropic characteristics. (4) X-ray crystal can occur regularly diffraction. X-ray diffraction can produce macroscopic Shandong days Yue Crystal Materials Co., Ltd. is a substance on the experimental determination is not the crystal structure of the particles and their forces can be divided into four categories: TEM images look crystal structure from child crystals, atomic crystals, molecular crystals and metallic crystals. The solid can be divided into crystals, amorphous and semi-crystalline three categories. Geometry with a neat rules, fixed melting point and anisotropic solid material, is a basic form of material existence. Solid material is crystalline, usually by X-ray diffraction to be identified. The crystal structure of the particles (atoms, ions, molecules, radicals) are regularly repeated periodically in three-dimensional space are arranged to form a certain form of the lattice, the shape of the performance of a certain shape geometry polyhedron. A polyhedron composed of geometrical plane called the crystal surface, due to different growth conditions, the crystal in the shape may be somewhat skewed, but between the same kind of crystal plane angle between the crystal (crystal plane angle) is constant, called crystal plane angle is not change principle. Its internal crystal structure can be divided into seven crystal systems and 14 kinds of lattice type. Synthetic single crystal bismuth crystal has a certain symmetry, there are 32 kinds of symmetry elements of the Department, and the corresponding action group called symmetric crystal system point group. According to the different nature of the forces between particles inside the crystal can be divided into ionic crystals, atomic crystals, molecular crystals, metal crystals, and other four typical crystal, such as salt, diamond, ice and various metals. There are differences between the same crystal single crystal and polycrystalline (or rose quartz) is. Also has a mixed crystal in practice. Speaking of crystal, have talked about from crystals. We know that all matter is made of atoms or molecules. As we all know, there are three kinds of material gathered forms: gas, liquid and solid crystals of the main methods. [1] (5) corresponding to the crystal planes of equal angles, called crystal plane angle conserved. Popular terms, the semiconductor layer and the semiconductor laser, LED light emitting section, the growth of crystals is formed on the substrate. Depending on the substrate used in the LED light emission wavelength and selectively used. If a blue LED and white LED, a GaN-based LED chip of semiconductor material, using sapphire, SiC and Si or the like as a substrate, if it is a red LED such as the use of LED chip AlInGaP-based material, such as GaAs is used as the substrate. A reason for LED emission wavelength is used in order to select a different substrate with the LED light emitting part - of the semiconductor crystal lattice constant as close to the lattice constant of the low-cost substrate materials. This gap between the lattice constant (lattice mismatch) will be reduced, the possibility of disturbing light emission of crystalline defects in the semiconductor layer will be reduced. But also to reduce the unit price of LED chips. Further, the current density and optical output denser blue-violet semiconductor laser element, the use of expensive GaN substrate. GaN substrates are also used part of the blue LED. In recent years, in order to increase light extraction from the LED chip, after the formation of the semiconductor crystal layer Crystal Materials, Shandong Tianyue Ltd. on the substrate, the substrate to be posted on the other substrate technology has been in practical use. When affixed to the other substrate, and the interface between the semiconductor crystal layer is provided between the light reflective layer. Reflective layer has a light-emitting layer reflection light toward the substrate side Shandong days Yue, extract it to the effect of the LED surface side. In addition to the red LED has been used, but recently the blue LED, GaN-based semiconductor LED chip also expanded adoption. GaN-based semiconductor material using an LED as well as not to post the substrate, so that it remains in a state of peeling method. These methods are more effective on the larger dimensions of the LED chip. There is a large-sized chip in the chip occurs off-chip when the light exit optical path becomes long, resulting in a problem of light attenuation occurs in the process. This problem can be solved by posting board. Shandong days Yue-saving materials | Sapphire (certified) | Yue provided by Jinan Shandong days Spark Technology Development Company Limited. Jinan Spark Technology Development Co., Ltd. (www.sicc.cc) (http://www.sicc.cc) is a leader in Jinan, chemical equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Shandong days Yue leadership with the staff warmly welcome all inquiries negotiations to create Shandong days Yue a better future. You can also access (www.sicc.cc/supply_details_42658800.html), for more information about the company.