Keyword: PCB rigid plate, PCB board, printed circuit board
PCB board used them to classification has a single panel, double panel, sandwich plate, according to the material of flexible PCB (flexible plate), as well as the combination of rigid PCB, firm soft PCB (just scratch combined with plate), etc.
PCB is Printed circuit board, abbreviations, Chinese name called Printed Circuit Board, also known as Printed Circuit boards, Printed Circuit Board, is an important electronic components, electronic components to support the body, the provider of the electronic components electrical connection, since it is made of electronic printing, so it is also referred to as the "Printed Circuit Board. PCB is simple said with integrated circuits and other electronic components of the thin plate.
A, according to the circuit layer classification: divided into the single panel, double panel and sandwich plate. Common laminated general for 3-6 layer board, complex sandwich plate can be up to a dozen layer.
(1) single panel
In the most basic of printed circuit boards, the parts on one side, conductor is focused on the other side. Because wires only appear on one side, so that the printed circuit board for a single panel. Because single panel in the design of lines, there are many restrictions (because only one side, wiring must around the path alone cannot cross between), so the early circuit using this type of circuit board.
(2) double panel
The two sides of the circuit board wiring. In order to make the two sides of the conductor to unicom, must have appropriate circuit connection between the two sides, the connection between the circuit is called a guide hole. Guide hole in printed circuit boards, or coated with metal small hole, it can be connected to both sides of the wire. Because the area of the double panel than double, single panel and wiring can cross (round to the other side), so the double panel can be used in more complex than a single panel circuit.
(3) laminated
Can in order to increase the area of the wiring, laminated to adopt more single or double wiring board. Profes sional use several piece of double panel, and between each layer plate fastened after into a layer of insulation. PCB layers on behalf of several independent wiring layer, usually layer is even, and contains the most the outside of the two layers.
B, according to the classification of substrates, the flexible circuit board, rigid circuit boards and soft boards.
(1) flexible PCB (flexible plate)
Flexible plate is made of flexible substrate printed circuit board, its advantage is to bend, to facilitate electrical parts assembly. FPC in aerospace, military, mobile communication, portable computers, computer peripherals, PDA, digital cameras, and other fields or the product has been widely used.
(2) the rigid PCB
Is made of paper base (often used in the single side) or glass cloth (often used for double-sided and multi-layer), presoak phenolic resin or epoxy resin, surface on one side or two sides stick to copper-clad laminated solidifying. The PCB copper-clad plate, we call it the rigid plate. Made PCB again, we'll call it the rigid PCB rigid plate is not easy to bend, with certain degree of strength of rigid base material made of printed circuit boards, its advantage is that can be attached to its electronic components provide certain support.
(3) and soft in combination with PCB (just scratch combined with board)
And soft combination plate refers to a piece of printed circuit boards contain one or more rigid and flexible area, by the rigid plate and a flexible plate laminated together. Soft combination plate has the advantage of both the rigid printing plate can provide support, but also has flexible plate bending properties, can meet the demand of the 3 d assembly.
Source: //www.seekic.com
