Explain the PCB circuit board composed of elements from a professional point of view , as well as individual elements with character. PCB circuit board by a glass fiber , glass fiber cloth, copper , copper clad laminate , etc., then details the unique characteristics of each element :
Fiberglass Yarn : glass fiber yarn by a silica sand and other raw materials in the kiln firing into a liquid through a very fine nozzle alloy pull into a fine glass fiber, fiberglass wrapped around the mountain and then hundreds of root fiberglass yarn. Kiln building huge investment for capital-intensive industries , 30,000 tons of furnace needs 400 million yuan , the new kiln requires 18 months, the economic cycle is difficult to grasp, and once the ignition must be 24-hour production, but over five years about half a maintenance shutdown must enter a huge exit costs .
Fiberglass cloth : fiberglass cloth is one of the raw materials CCL , textile made from the glass fiber yarn , about 40% of the cost of the CCL ( thick ) and 25% ( thin ) . Fiberglass cloth and weaving companies manufacturing the like , can be controlled by controlling the speed of the production capacity and quality , and specifications relatively simple and stable , almost did not change much on the specification since World War II . And different CCL, fiberglass cloth prices affected the relationship between supply and demand , price volatility in recent years between $ 0.50 ~ 1.00 / m. Currently produced in Taiwan and mainland China to account for about 70 % of the world . The relationship between upstream and downstream operations critical to the price of a loom 10 to 150,000 , usually more than 100 production units may be normal , but higher capital requirements subsequent heat treatment and chemical processing equipment , amounting to tens of millions , weaving fabric capacity expansion easy , more flexible.
Copper : copper is accounted for the largest proportion of the cost of raw materials, CCL , CCL costs about 30% ( thick ) and 50% ( thin ) or more, so copper 's price is the main driving force of CCL prices . Copper foil used widely not only used in CCL industry , when CCL industry downturn , converting copper foil manufacturers to other purposes . Copper prices closely reflect changes in the price of copper , as copper prices steadily rising , copper manufacturers to shift cost pressures downstream. Barriers to high-tech industries has led to the shortage of domestic copper supply , still a large number of high-grade copper imports, the cost of investment in enterprises is also great .
CCL ( referred CCL): E -grade glass fiber cloth is a substrate, impregnated with epoxy resin , after drying, into a semi-cured state adhesive sheet , and then in single, double or multi-layer Apply a thin plate surface copper plate by hot pressing process under special conditions made from raw materials of the PCB directly . CCL industry demand for larger funds , small-scale plant is about 50 million yuan , a high degree of concentration , there are about 100 . CCL industry is a cyclical industry cost drivers in the upstream and downstream industry chain structure , CCL for PCB bargaining ability, as long as the downstream demand is adequate, the pressure of rising costs can be passed on downstream PCB manufacturers, but only large -scale the CCL can have a strong voice in fiberglass cloth, copper and other raw materials procurement. Since CCL product uses a single , printed circuit board factory only sell when the PCB downturn, only lower prices in order to ensure the use of production capacity .
