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PCB copper foil basic knowledge

May 10, 2017

Copper foil: a cathodic electrolytic material, a thin, continuous metal foil deposited on the base layer of a circuit board, which acts as a conductor for a PCB circuit board. 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%, the size of 16 * 16cm. Copper foil is the most widely used decorative material. Such as: hotel hotels, monasteries Buddha, the flagship, tile mosaic, handicrafts and so on.

Copper foil has a low surface oxygen characteristics, can be attached with a variety of different substrates, such as metal, insulation materials, etc., have a wide temperature range. 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.

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