Polyimide is one of the best comprehensive properties of organic polymer materials, high temperature 400 ℃, polyimide is refers to the main chain containing imide ring (-CO-NH-CO-) is a class of polymers, which containphthalic imide structure is the most important polymer. Polyimide is a kind ofspecial engineering material, has been widely used in aviation, aerospace,microelectronics, nanotechnology, liquid crystal, separation membrane, laserfields. Recently, all countries in the research, development and utilization ofpolyimide included in twenty-first Century the most promising one of Engineering plastics. Polyimide, because of its outstanding characteristics of property and synthesis, both as a structural material or as a functionalmaterial, its huge application prospect has been fully understood, called" problem solver " (protion Solver), and that of " no polyimidewould not have the microelectronic technology " today;.