what single PCB board & Multi-layer PCBPosted on 2020-01-03
What is a single PCB board
Single panel is on the most basic PCB, with parts concentrated on one side and wires on the other side. Because the wires only appear on one side, we call this PCB a Single-sided. Because the single-sided board has many strict restrictions on the design circuit (because there is only one side, the wiring cannot cross and must go around its own path), only early boards use this type of board; the single-sided wiring diagram is printed on the network (Screen Printing) Mainly, that is, a resist is printed on the copper surface. After etching, a mark is printed on the solder resist. Finally, the part guide hole and the shape are completed by punching. In addition, some small and diverse products use a photoresist to form patterns.
What is dual PCB board
What is dual-PCB board & Multi-layer PCB, and how to see a board is a dual-panel and the definition of dual-panel. These questions are believed to be very vague for some novice friends who are just engaged in the circuit board industry. I often hear that there are single-panel, dual-panel, and multilayer. Board, aluminum substrate, impedance board, FPC soft board, etc., but they can not be distinguished, sometimes not confident enough to talk to customers, can not confirm whether the statement is correct, today we will guide these novice friends to learn how to confirm the dual panel! Strictly speaking, dual-panel is a very important type of PCB in the circuit board. It is very useful. It is easy to see if a PCB is a dual-panel. I believe that friends can fully understand the single-panel. Hold it, the double panel is an extension of the single panel, which means that the circuit of the single panel is not enough to turn to the reverse side. Another important feature of the double panel is that it has vias. To put it simply, it is a double-sided wiring, with lines on both sides! In a word, the board with double-sided wiring is a double-sided board! Some friends have to ask, for example, a board has double-sided wiring, but only one side has electronic parts. Is this board a double-sided or single-sided one? The answer is obvious. Such a board is a double-sided board, and only the parts are mounted on the double-sided board!
What is Multi-layer PCB
How to see if a board is a Multi-layer PCB, what are the characteristics of a multilayer board, what is a multilayer board, and what are the uses of a multilayer board? Today we are going to answer the concept of multi-layer boards in the minds of friends, recognize the characteristics of multi-layer boards, and clearly distinguish the multi-layer boards! As the name suggests, multi-layer boards are two or more layers. What has been said above is double-sided boards, then multi-layer boards are more than two layers, such as four layers, six layers, eight layers, etc., everyone must be. Remember that there are no odd numbers of multilayer boards, all of them are multiples of 2. These are basic common sense. Don’t make funny things in your future life! Since the multi-layer board is a multiple of the double-sided board, it should also have the characteristics of the double-sided board: it is larger than the conductive wiring diagram of the two-layer board, and there is an insulating material between the layers, and the conductive wiring diagram between the layers must be The printed boards connected by drilling and sticking according to the requirements of the circuit are called multilayer circuit boards. The advantages of multilayer circuit boards are that conductive wires are multilayer drilling and because of their high density, they do not need to be unrolled, and the volume will be compared. It is small and relatively light, because of its high density, it reduces the space distance of components and is not so easy to break. That is to say, the stability is more reliable, and the number of layers increases the flexibility of the design. The purpose of high-speed transmission for a circuit with a certain impedance is precisely because of these advantages. There are also some shortcomings, such as high cost, long production time, and difficult detection. However, these shortcomings do not affect the use of multilayer boards at all. Printed circuit is an inevitable product of the development of electronic technology towards high speed, multi-function, large capacity and small volume. With the continuous development of electronic technology, especially the extensive and in-depth application of large-scale and ultra-large-scale integrated circuits, multilayer printed circuits are rapidly developing in the direction of high density, high precision, and high-level digitalization. , Blind and buried holes, high plate thickness aperture ratio and other technologies to meet the needs of the market. Due to the computer and aerospace industry’s need for high-speed circuits. It is required to further increase the packaging density, coupled with the reduction in the size of discrete components and the rapid development of microelectronics, electronic equipment is developing in the direction of volume reduction and quality reduction; single and double-sided printed boards are not possible due to the limitation of available space To achieve a further increase in assembly density. Therefore, it is necessary to consider using more printed circuits than double-layered layers.