The current focus of printed circuit board industry is "LED thermal conductivity of the substrate. As an emerging market, the LED thermal conductivity of the substrate is expected to lead to the new technologies development of printed circuit board industry, and thus brings about the change of industrial structure, and even make printed circuit board industry has leapt to a higher level, to change the situation, large without the disadvantage and lack of innovative capacity. The advent and rise of a new generation of electronic machine products always drive the emergence of a new generation of printed circuit board (PCB) and the substrate material. In opening new markets, new applications at the same time, it also tends to promote the industry as a whole leap and change in industrial structure.The early 1990s, the development of portable electronic products, as the representative of the whole electronic products to the thin light, gave birth to the PCB industry, high-density interconnect (HDI) board development.Developed industrial countries, for example, Japan have taken note of this industry trend. Since 2009 the substrate for the Japanese PCB industry buzzword. Many Japanese PCB industry enterprises looked for new business opportunities to get rid of the shadow of the financial crisis.It is estimated the thermal conductivity of the substrate cooling technology will be towards high heat, low thermal resistance, into the function of the direction of the entire system installation.