PCB Blogger-China PCB Factory,HOYOGO

      PCB panelization:  It is to splice several PCB together.  It is not only improves production efficiency,  saves costs, but also facilitates SMT welding in the later stage.  So what are the methods of PCB panelization?     1. V-CUT V-CUT is to put two or more PCB together, and then cut a V-shaped slot at the connection between the board and the board, which can be broken when in use. Since V-CUT can only cut straight lines, it is more suitable for rectangular PCB boards.  Secondly, V-CUT also has certain requirements on the thickness of the PCB, generally requiring a thickness of more than 1mm.   Because it is too thin, it will destroy the strength of the board itself, so the PCB with the thickness less than 1mm is not suitable for the V-CUT panelization method.       2.  Stamp Hole The stamp hole are some small holes drilled at the connection of the board to form a connection, and the burrs need to be removed all around.  The size of the hole is generally about 0.3mm, and the dis

      Solder paste is an indispensable material in SMT processing. The main function of solder paste is to form electrical connections between PCB pads and electronic components. There are different types of solder paste, so it is necessary to choose solder paste according to the type of customer's products. So what types of solder pastes are there?       1.  Leaded and lead-free solder pastes L eaded solder paste : As the name suggests, it contains lead in the ingredients. Although it is harmful to the environment and human body, the welding effect is good, the cost is low, and the mechanical strength of the solder joint is high. It can be applied to some electronic products that do not require environmental protection.     L ead-free solder pastes :   Its characteristics are that it is less harmful to human body and belongs to environmental protection products, but the mechanical strength of solder joints is lower than that of leaded solder paste.   Generally, lead-free solder pa

      Common PCB failure problems can be divided into: poor PCB design, damage to electronic components, poor quality of components, short circuits, etc. Then, when the PCB fails, how to troubleshoot it?       Common PCB faults are mainly concentrated on components such as capacitors, resistors,  inductors,   as well as integrated chips and crystal oscillators.  To judge whether these components are faulty,  we  can observe them through eyes . If there are obvious burn marks on the surface of damaged electronic components, such faults can be solved by directly replacing the  defective  components with new ones.     However, not all damage to electonic components can be observed with the naked eye.  What should  we   do   when the components are damaged and there are no visible burn masks on the surface ? We can use professional inspection tools for maintenance, such as multimeters, capacitance meters, etc. When it is detected that the voltage or current of an electronic component is no

       Metal PCB: It is a circuit board made of a metal substrate. It is mainly divided into aluminum base, copper base and iron base PCB. Among them, the application of aluminum base PCB is the most, and the application of iron base PCB is a minority. So what are the advantages of these metal base PCB?       1.  H eat  D issipation Some circuit board have high density and high power, and it is difficult to dissipate heat. But metal base PCB has good heat dissipation to solve this problem. Comparing the 3 metal base PCB: the copper base PCB has the best heat dissipation effect and the most expensive one.     2.  Thermal expansion When some components are heated to a certain temperature, they will expand. Since the metal base PCB has good heat dissipation, this problem can be effectively alleviated, and the durability and reliability of the electronic device can be improved.     3.  Size Stability Under the action of force, heat or other external conditions, the outline dimensions of th

       Did you know that the distributed capacitance of the printed circuit board layout will work at high frequencies. When the length is greater than 1/20 of the corresponding wavelength of the noise frequency, an antenna effect will occur, and the noise will extend the emission through the layout. If there is a poorly grounded copper pour in the PCB, the copper pour becomes a noise propagation tool. So, in high-frequency circuits, do not think that the ground wire is grounded. This is the "ground wire". Be sure to punch holes in the wiring with a pitch less than  λ /20 to "good ground" with the ground plane of the multilayer board.  If the copper pour is handled properly, the copper pour not only has a larger current, but also plays a dual role of shielding interference. There are generally two basic methods for copper pour, which are large-area copper pour and copper grid. People often ask, is it better to pour copper over a large area or copper grid? But this i

       Metal PCB: It is a circuit board made of a metal substrate. It is mainly divided into aluminum base, copper base and iron base PCB. Among them, the application of aluminum base PCB is the most, and the application of iron base PCB is a minority. So what are the advantages of these metal base PCB?     1.  H eat  D issipation Some circuit board have high density and high power, and it is difficult to dissipate heat. But metal base PCB has good heat dissipation to solve this problem. Comparing the 3 metal base PCB: the copper base PCB has the best heat dissipation effect and the most expensive one.     2.  Thermal expansion When some components are heated to a certain temperature, they will expand. Since the metal base PCB has good heat dissipation, this problem can be effectively alleviated, and the durability and reliability of the electronic device can be improved.     3.  Size Stability Under the action of force, heat or other external conditions, the outline dimensions of the

        PCB are sometimes processed by dispensing machines, which are mainly used for waterproof, dustproof, anticorrosion, and long-term effective protection of PCB and some electronic components that are sensitive to some electronic equipment. In the dispensing process, there are 3 dispensing paths. Do you know which 3 are?       1.  I-shaped Distribution Path The I-shaped dispensing path, also known as the straight-line dispensing path, is suitable for dispensing where a small area is required at the edge of the chip. The length of the dispensing route is generally 50% to 125% of the edge length of the chip. Longer lines can help reduce the curing time of the glue at the edge of the chip, but increase the possibility of trapping some air bubbles, so care needs to be taken to control the amount of glue used.     2.  L-shaped  D ispensing  P ath The L-shaped dispensing path is dispensing along the adjacent two sides of the chip. The glue has the shortest flow time and the shortest cur

      Vias are one of the important components of a PCB.  A via is mainly composed of two parts, one is the drill hole in the middle, and other is the pad area around the drill hole. In the PCB manufacturing process, there are 3 methods of processing vias. What are these?       1.  Vias covered with solder mask ink Vias covered with solder mask ink means that the solder ring of the via is not exposed and covered with solder mask ink, which not only ensures the electrical performance, but also avoids the risk of short circuit with other components during use.     2.  V ias with solder mask opening Vias with solder mask opening means that the solder ring of the via is exposed and not covered with solder mask ink. This processing method is similar to the processing method for plug-in holes. The plug-in holes generally require opened and tinned.  This kind of processing is usually carried out when there are special needs for vias with solder mask opening.   If the surface treatment is HASL