Basic knowledge of PCB board copper foil

First, the copper profile:

Copper foil: A cathodic electrolytic material, a thin, continuous metal foil deposited on the base layer of a circuit board, which serves as a conductor for PCBs. It is easy to adhere to the insulation layer, to accept the protective layer of printing, corrosion after the formation of circuit patterns. Copper mirror test: A flux corrosion test using a vacuum precipitated film on a glass plate.

Copper foil by a certain percentage of copper made of other metal, copper foil generally have 90 foil and 88 foil two, that is, copper content of 90% and 88%, size 16 * 16cm. Copper foil is the most widely used decorative material. Such as: hotel hotels, monasteries, gold signs, tile mosaic, handicrafts and so on.

Second, the product characteristics

Copper foil has a low surface oxygen characteristics, can be attached with a variety of different substrates, such as metal, insulating materials, etc., have a wide range of temperature use. Mainly used in electromagnetic shielding and anti-static, the conductive copper foil placed on the substrate surface, combined with metal substrate, with excellent continuity, and provide 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 of more than 99.7%, thickness 5um-105um) is one of the basic materials of the electronics industry The rapid development of electronic information industry, the use of electronic grade copper foil is growing, the products are widely used in industrial calculators, Communications equipment, QA equipment, lithium-ion batteries, civilian television sets, video recorders, CD players, copiers, telephone, air conditioning, automotive electronics, game consoles. Domestic and international market for electronic grade copper foil, especially high-performance electronic grade copper foil demand is increasing. Relevant professional organizations predicted that by 2015, China’s domestic copper-grade copper demand will reach 300,000 tons, China will become the world’s largest printed circuit boards and copper foil base manufacturing, electronic grade copper foil, especially high-performance foil market optimistic TheThird, the global supply of copper foil situation

Industrial copper foil can be divided into two categories: rolled copper foil (RA copper foil) and point copper foil (ED copper foil), in which the calendering copper foil has good ductility and other characteristics, is the early soft plate process used Copper foil, while the electrolytic copper foil is a lower cost of manufacturing copper foil. As the rolling copper foil is an important raw material of the soft board, so the characteristics of calendering copper foil and price changes on the soft board industry have a certain impact.

As the manufacturer of rolling copper foil less, and technically also in the hands of some manufacturers, so the customer price and supply of low degree of control, so without affecting the performance of the premise, with electrolytic copper instead of rolling Copper foil is a viable solution. However, if the physical properties of the structure of the copper foil itself will affect the etching factor in the next few years, the importance of rolling the copper foil will increase again in the case of thinner or thinner products.


There are two major obstacles to the production of calendars, barriers to resources and technical barriers. Resource barriers refers to the production of calendering copper need to support the raw materials, possession of resources is very important. On the other hand, technical barriers to prohibit more new entrants, in addition to calendering technology, the surface treatment or oxidation technology is also. Most of the global manufacturers have a lot of technical patents and key technologies Know How to increase barriers to entry. If the new entrants to post-processing production, but also by the cost of the manufacturers to suppress, not easy to join the market, so the world’s rolling copper is still a strong exclusive market.

Fourth, the development of copper foil Copper foil for electrodepositedcopperfoil is an important material made of CCL and printed circuit board (PCB).

In today’s rapid development of electronic information industry, electrolytic copper foil is called: electronic products signal and power transmission, communication “neural network”. Since 2002, China’s printed circuit board production value has entered the world’s third, as the Heavy copper PCB substrate material – CCL has become the world’s third largest producer.

Which also makes China’s electrolytic copper industry in recent years has been rapid development. In order to understand and understand the development of the world and China’s electrolytic copper industry in the past, and now look forward to the future, according to China Epoxy Industry Association experts to review its development.

From the perspective of the production department of the electrolytic copper foil industry and the development and change of the market, it can be divided into three development periods: the United States to create the initial world copper foil enterprises and electrolytic copper industry started the period;
Enterprises in a comprehensive monopoly of the world market period; the world multipolarization of the market for the period.

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