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 Is a circuit board
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Is a circuit board

Speaking of PCB board, I believe we will feel very strange, in fact, PCB board quality in life we are often in contact, and we usually say that the printed circuit board refers to the bare board - that is, the circuit board without components. Of course, some circuit boards are not printed circuit boards {PCB circuit board}. Therefore, it can be said that the scope of circuit board is larger, which includes PCB board. At present, the mainstream PCB material classification mainly includes the following types: FR-4(glass fiber cloth base), CIM-1/3 (glass fiber and paper composite substrate), FR-1(paper based copper clad plate), metal based copper clad plate (mainly aluminum base, a few are iron base) and above are relatively common material types at present, which are generally referred to as rigid PCB.


In the case of a single-sided PCB board, the single-sided printed circuit board comprises only one layer of substrate or substrate. One end of the substrate is coated with a thin layer of metal, usually copper, because it is a good conductor of electricity. Typically, a protective welding mask is located on the peak of the copper layer, and a final wire mesh coating can be applied to the top to mark the elements of the plate. In addition to single-sided PCB boards, there are also double-sided PCB boards, and this type of PCB is more familiar than single-sided PCB boards. Both sides of the substrate of the plate include metallic conductive layers to which the elements are also attached. Holes in a PCB allow circuits on a single circuit to connect to circuits on the other side. In addition to the above cases, there are multilayer PCB boards, and these PCBS further expand the density and complexity of PCB designs by adding additional layers beyond the top and bottom layers seen in two-sided configurations. With the multiple levels of accessibility in multilayer PCB configurations, multilayer PCBS enable designers to produce very thick and highly composite designs. 


In addition, Jie dubang Xiao bian also wants to add a knowledge point with you, if according to the PCB board enhancement materials are generally divided into the following kinds:


1, phenolic PCB paper substrate

This paper substrate is characterized by no fire, can be punching processing, low cost, cheap price, relatively small density. Phenolic paper substrates we often see XPC, FR-1, FR-2, FE-3, etc. 94V0 is flame retardant cardboard, is fire resistant. Because this PCB board is composed of pulp and wood pulp, so sometimes also become cardboard, V0 board, flame retardant board and 94HB, etc., its main material is wood pulp fiber paper, after phenolic resin pressure and synthesis of a PCB board.


2, glass fiber PCB substrate

Sometimes also known as epoxy board, glass fiber board, FR4, fiberboard, etc., it is made of epoxy resin as the adhesive, and glass fiber cloth as the reinforcement material. This kind of circuit board working temperature is high, affected by the environment is very small, in double-sided PCB often used this board, but the price is relatively expensive composite PCB substrate, commonly used thickness of 1.6mm. This substrate is suitable for all kinds of power board, high level circuit board, in the computer and peripheral equipment, communication equipment and other applications.


3, composite PCB substrate

This is also known as powder board, with wood pulp fiber paper or cotton pulp fiber paper as the reinforcement material, supplemented with glass fiber cloth as the surface reinforcement material, two materials made of flame retardant epoxy resin. There are single-sided semi-glass fiber 22F, CIM-1 and double-sided semi-glass fiber plate CIM-3, among which CIM-1 and CIM-3 are the most common composite base copper clad plates.


Through the above introduction, I believe that we have a certain understanding of PCB board quality, PCB board quality classification, different classification, performance is different, use is also different, so, in use, for PCB board quality should have a certain general understanding, only understand the PCBA board quality classification, to better application of PCB board. Jidobang PCB always adhere to the exquisite technical force, sophisticated production equipment, perfect detection means, higher than the industry standard product quality, warm and thoughtful service, has won the praise and welcome of merchants and users around the world.

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