Printed circuit board (Printed circuit board, referred to as PCB) substrate, assembly of electronic parts in a common substrate, the formation of point connections and printed components, printed circuit board a predetermined design. The main function of the product is all kinds of Electronic Components to form a predetermined circuit connection from the relay transmission is a key electronic products, electronic interconnect products. Quality of the printed circuit board manufacturing, not only directly affect the reliability of electronic products, but also affect the overall competitiveness of system products, printed circuit board known as "the mother of the electronic system products. The level of development of the printed circuit board industry to a certain extent reflect the pace of development of a country or region of the electronics industry and technology standards.
Glass fiber yarn: glass fiber was calcined in a kiln by the silica sand and other raw materials into a liquid through a very small alloy nozzle pull into a very fine glass fiber, and then hundreds of root fiberglass wrapped around the mountain of glass fiber. Kiln construction of the huge investment, for capital-intensive industries, 30,000 tons of furnace requires 400 million yuan, new furnace 18, the business cycle is difficult to grasp, and once the ignition must be 24-hour production, and over five years so, it must suspend for six months for maintenance, entry and exit costly.