Introduction of copper foil
Copper foil (copper foil): a kind of negative electrolytic material, a thin, continuous metallic foil deposited on the base plate of a circuit board. It is used as the conductor of PCB. It is easy to adhere to the insulating layer, accept the printed protective layer, and form a circuit pattern after corrosion. Copper mirror test (the mirror test): a flux corrosion test, using a vacuum film deposition on glass plate.
Other metal foil made by copper and a certain proportion of the formed copper foil and foil 88 generally have 90 two, the amount of copper was 90% and 88%, the size is 16*16cm. Copper foil is the most widely used decorative material. Such as: Gaestgiveriet Hotel, temple statues, mosaics, crafts and other tiles, a gilded signboard.
Product characteristics
Copper foil has low surface oxygen characteristics, can be attached to a variety of different substrates, such as metals, insulation materials, etc., has a wide range of temperature applications. Mainly used in electromagnetic shielding and antistatic, conductive copper foil positioned on the substrate surface, combined with the metal substrate, with excellent conductivity, and the effect of electromagnetic shielding. Can be divided into: self-adhesive copper foil, double copper foil, single copper foil and so on.
Electronic grade copper foil (purity more than 99.7%, the thickness of 5um-105um) is the rapid development of electronic information industry is one of the basic material of the electronics industry, electronic grade copper foil are used more and more big, the products are widely used in industrial use calculator, communications equipment, QA equipment, lithium ion battery, TV, VCR, civilian CD player, copiers, telephones, air conditioning, automobile electronic parts, game machine etc.. Domestic and international market demand for electronic grade copper foil, especially high performance electronic grade copper foil, is increasing. The relevant professional institutions predict that by 2015, Chinese electronic grade copper domestic demand will reach 300 thousand tons, Chinese will become the largest manufacturing world printed circuit board and copper base, especially the high performance electronic grade copper foil market.
Global supply of copper foil
Can be divided into common industrial copper foil rolled copper foil (RA copper foil and copper foil (ED) solution of copper foil) two categories, which has rolled copper foil ductility good, is the process of early soft plate and copper foil, electrolytic copper foil is advantage with low manufacturing cost is rolled copper foil. Because the rolled copper foil is an important raw material of soft board, the improvement and price change of rolled copper foil have certain influence on the soft board industry.
Because the rolling copper manufacturers less, and the technology also lies in part of the manufacturers hands, so customers on the price and supply of the master degree is low, so in the premise of not affecting the performance of the product, the electrolytic copper foil rolled copper foil is a viable alternative way. But if the next few years because the physical properties of copper foil structure will affect the etching factor in thinning and thinning of the products, in addition to high frequency products for telecommunications considerations, will once again raise the importance of rolled copper foil.
There are two major obstacles to the production of rolled copper foil: resource barriers and technical barriers. Resources barrier refers to the production of rolled copper foil, copper material to support, to occupy the resources is very important. On the other hand, technical barriers so that more new entrants deterred, in addition to rolling technology, surface treatment or oxidation treatment on the technology is also. Most of the global manufacturers have many technical patents and key technologies, Know, How, increasing barriers to entry. If you adopt postprocessing by adding new production, manufacturers cost is not easy to suppress, successful entry into the market, so the copper foil rolling global monopoly market is still strong.
Copper foil development
Copper foil is an important material for copper clad laminate (CCL) and printed circuit board (PCB) manufacturing. In today's rapid development of electronic information industry, electrolytic copper foil is called "electronic products, signal and power transmission and communication" neural network". Since 2002, China's printed circuit board production value has become the third place in the world. As the substrate material of PCB copper clad laminate has become the third largest producer in the world. As a result, China's electrolytic copper foil industry has made rapid progress in recent years. In order to understand and understand the past, present and future of China's electrolytic copper foil industry, a review is made on the development of China's epoxy resin industry association.
The electrolytic copper foil industry production department and the market point of view, we can divide the development process into 3 periods: the United States to create the original world copper enterprises and electrolytic copper industry started in Japan; copper enterprise monopolize the world market; world multi polarization for the market period.
