Copper foil is a very thin copper material. It can be divided by process into two types: rolled(RA) copper foil and electrolytic(ED) copper foil. Copper foil has excellent electrical and thermal conductivity, and has the property of shielding electrical and magnetic signals. Copper foil is used in large quantities in the manufacture of precision electronic components. With the advancement of modern manufacturing, the demand for thinner, lighter, smaller and more portable electronic products has led to a wider range of applications for copper foil.
Rolled copper foil is referred to as RA copper foil. It is a copper material that is manufactured by physical rolling. Due to its manufacturing process, RA copper foil has a spherical structure inside. And it can be adjusted to soft and hard temper by using the annealing process. RA copper foil is used in the manufacture of high-end electronic products, especially those that require a certain degree of flexibility in the material.
Electrolytic copper foil is referred to as ED copper foil. It is a copper foil material that is manufactured by a chemical deposition process. Due to the nature of the production process, electrolytic copper foil has a columnar structure inside. The production process of electrolytic copper foil is relatively simple and is used in products that require a large number of simple processes, such as circuit boards and lithium battery negative electrodes.
RA copper foil and electrolytic copper foil have their advantages and disadvantages in following espects:
RA copper foil is purer in terms of copper content;
RA copper foil has better overall performance than electrolytic copper foil in terms of physical properties;
There is little difference between the two types of copper foil in terms of chemical properties;
In terms of cost, ED copper foil is easier to mass produce because of its relatively simple manufacturing process and is less expensive than calendered copper foil.
Generally, RA copper foil is used in the early stages of product manufacturing, but as the manufacturing process becomes more mature, ED copper foil will take over in order to reduce costs.
Copper foil has good electrical and thermal conductivity, and it also has good shielding properties for electrical and magnetic signals. Therefore, it is often used as a medium for electrical or thermal conduction in electronic and electrical products, or as a shielding material for some electronic components. Due to the apparent and physical properties of copper and copper alloys, they are also used in architectural decoration and other industries.
The raw material for copper foil is pure copper, but the raw materials are in different states due to different production processes. Rolled copper foil is generally made from electrolytic cathode copper sheets that are melted and then rolled; Electrolytic copper foil needs to put raw materials into sulfuric acid solution for dissolving as copper-bath, then it is more inclined to use raw materials such as copper shot or copper wire for better dissolution with sulfuric acid.
Copper ions are very active in the air and can easily react with oxygen ions in the air to form copper oxide. We treat the surface of copper foil with room temperature anti-oxidation during the production process, but this only delays the time when the copper foil is oxidized. Therefore, it is recommended to use copper foil as soon as possible after unpacking. And store the unused copper foil in a dry, light-proof place away from volatile gases. The recommended storage temperature for copper foil is about 25 degrees Celsius and the humidity should not exceed 70%.
Copper foil is not only a conductive material, but also the most cost-effective industrial material available. Copper foil has better electrical and thermal conductivity than ordinary metallic materials.
Copper foil tape is generally conductive on the copper side, and the adhesive side can also be made conductive by putting conductive powder in the adhesive. Therefore, you need to confirm whether you need single-sided conductive copper foil tape or double-sided conductive copper foil tape at the time of purchase.
Copper foil with slight surface oxidation can be removed with an alcohol sponge. If it is a long time oxidation or large area oxidation, it needs to be removed by cleaning with sulfuric acid solution.
CIVEN Metal has a copper foil tape specifically for stained glass that is very easy to use.