Study on the substrate materials of high-brightness LED

Substrate material was the base and core of Semiconductor lighting industrial technology development,it was played a vital role in semiconductor industrial.The LED chip manufacturing guideline was directly determined by substrate material.The requirements of Semiconductor materials system of High-brightness LED were more strictly than the traditional LED's.The lattice match constant of epitaxy materials with substrate materials',the roughness of substrate materials,the coefficient of thermal expansion,the coefficient of thermal Conduction,the impact of polarity,the surface quality of the processing requirements,these factors were closely related with the luminous efficiency and stability of high-brightness LED.The lattice match of various typical materials with epitaxy materials and processing requirements was introducted mainly.The difficult level of fabricating substrate materials and the chemical stability of substrates with epitaxial films were comparatively analysed too.At last,the application prospect of substrate materials was predicted.