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The definition of PCB

- Jan 19, 2018 -

Printed circuit board {PCB circuit board}, also known as printed circuit board, is the electrical connection of electronic components of the provider. Its development has been over 100 years ago. Its main design is layout design. The main advantage of circuit board is to greatly reduce wiring and assembly errors, improve automation level and production labor rate.

按照线路板层数可分为单面板、双面板、四层板、六层板以及其他多层线路板。

According to the number of circuit board layers, it can be divided into single panel, double-sided board, four laminate, six laminate and other multi-layer circuit board.

由于印刷电路板并非一般终端产品,因此在名称的定义上略为混乱,例如:个人电脑用的母板,称为主板,而不能直接称为电路板,虽然主机板中有电路板的存在,但是并不相同,因此评估产业时两者有关却不能说相同。再譬如:因为有集成电路零件装载在电路板上,因而新闻媒体称他为IC板,但实质上他也不等同于印刷电路板。我们通常说的印刷电路板是指裸板-即没有上元器件的电路板。

The printed circuit board is not a general terminal products, so in the name of the definition of slight confusion, such as a personal computer with a motherboard, called the motherboard, but not directly called the circuit board, although the host circuit board in existence, but is not the same, so the evaluation of the industry when they are related but can not say the same. For example, because there are integrated circuit parts loaded on the circuit board, the news media call him a IC board, but in essence, he is not the same as the printed circuit board. The printed circuit board we usually refers to the circuit board that no bare board components.

classification

单面板

Single panel

在最基本的PCB上,零件集中在其中一面,导线则集中在另一面上。因为导线只出现在其中一面,所以这种PCB叫作单面板(Single-sided)。因为单面板在设计线路上有许多严格的限制(因为只有一面,布线间不能交叉而必须绕独自的路径),所以只有早期的电路才使用这类的板子。

On the most basic PCB, the parts are concentrated on one side, and the wires are concentrated on the other side. The PCB is called a single panel (Single-sided), because the wire only appears on one side. Because the single panel has many strict restrictions on the design line (because only one side, the wiring can't cross and must be around the independent path), so only the early circuit used this kind of board.

双面板

Double-sided plate

这种电路板的两面都有布线,不过要用上两面的导线,必须要在两面间有适当的电路连接才行。这种电路间的“桥梁”叫做导孔(via)。导孔是在PCB上,充满或涂上金属的小洞,它可以与两面的导线相连接。因为双面板的面积比单面板大了一倍,双面板解决了单面板中因为布线交错的难点(可以通过导孔通到另一面),它更适合用在比单面板更复杂的电路上。

Both sides of this circuit board have wiring, but to use two sides of the wire, it is necessary to have a proper circuit connection between the two sides. The "bridge" between these circuits is called the guide hole (via). A guide hole is a small hole in the PCB, filled with or coated with metal, which can be connected to the two sides of the wire. Because the area of double sided panels is twice larger than that of a single panel, double panels solve the difficulty of wiring interlacing in single panel (which can be passed to the other side through guide holes), which is more suitable for more complex circuits than single panel.

多层板

Multi-layer plate

为了增加可以布线的面积,多层板用上了更多单或双面的布线板。用一块双面作内层、二块单面作外层或二块双面作内层、二块单面作外层的印刷线路板,通过定位系统及绝缘粘结材料交替在一起且导电图形按设计要求进行互连的印刷线路板就成为四层、六层印刷电路板了,也称为多层印刷线路板。板子的层数并不代表有几层独立的布线层,在特殊情况下会加入空层来控制板厚,通常层数都是偶数,并且包含最外侧的两层。大部分的主机板都是4到8层的结构,不过技术上理论可以做到近100层的PCB板。大型的超级计算机大多使用相当多层的主机板,不过因为这类计算机已经可以用许多普通计算机的集群代替,超多层板已经渐渐不被使用了。因为PCB中的各层都紧密的结合,一般不太容易看出实际数目,不过如果仔细观察主机板,还是可以看出来。

In order to increase the area that can be wired, the multi-layer board uses more single or double-sided wiring boards. With a double and two single block as inner layer as the outer layer or two double-sided printed circuit board for the outer layer of the inner layer, two single block, through the positioning system and an insulating adhesive material alternately printed circuit board according to the design requirements for interconnection together and the conductive pattern becomes the four layer, six layer printed circuit board, also known as for multilayer printed circuit board. The number of layers does not mean that there are several independent wiring layers. Under special circumstances, the empty layer will be used to control the thickness of the plate. Usually the number of layers is even and contains the two most lateral ones. Most of the motherboards are 4 to 8 layers of structure, but the technical theory can achieve nearly 100 layers of PCB board. Large scale supercomputers mostly use quite many layers of motherboards. However, because such computers have been replaced by clusters of many common computers, super multilevel boards have been gradually unused. Because of the close combination of the layers in the PCB, it is generally not easy to see the actual number, but if you carefully observe the host board, you can see it.