PCB Blogger-China PCB Factory,HOYOGO

       In the PCB processing process, in order to save costs and improve production efficiency,  the PCB is usually spliced in the PCB manufacturing link, that is to say, multiple PCB are spliced on a substrate. After the assembly work is completed, the PCB needs to be spliced for subsequent testing, packaging and other work.   So what are the methods of PCB splitting?       1. Manual  Splitting Board Manual splitting board is mainly divided into manual splitting and shears board cutting pliers.  Manual splitting board is the operator manually breaking, folding and other actions to separate the panel boards.  Cutting pliers and dividing the board is to cut the board with the help of cutting pliers. Manual splitting board was the main splitting board method in the past, but due to the excessive stress caused by manual work during splitting board, the PCB was damaged. Therefore, with the popularization of the application of splitting board machines, the manual splitting board method has

       After the PCBA processing is completed, if the product assembly cannot be carried out in time, the PCBA board needs to be properly stored and placed, so how to store it for a long time?       1. Coat ing  conformal  coating PCBA boards without conformal coating cannot be exposed to the air for too long.  If you want to store for a long time, you can coat the PCBA with a conformal  coating , also called PCBA protective oil, which has the functions of anti-humid heat, dust-proof and anti-oxidation, which can effectively prolong the storage time of the finished PCBA board.  When c oat ing the  conformal  coating, you must choose the appropriate  conformal  coating type, because the protective effect of different types of  conformal  coating will be different.     2.  V acuum packaging Although coating  conformal  coating can prolong the storage time of PCBA, some PCBA boards will be equipped with some electronic components that cannot be coated with  conformal  coating, such as sen

      The copper  base PCB   is  mainly  based on  copper, and its composition  structure   are  the same as that of the aluminum  PCB , which are the copper base layer, the insulating layer and the circuit layer. 1. The circuit layer of the copper base PCB is required to have a large current carrying capacity, so thicker copper foil should be used.     2. The insulating layer is the core technology of the copper base PCB. The composition is composed of aluminum oxide and silicon powder and epoxy resin filled polymer.  It has low thermal resistance, excellent viscoelasticity, thermal aging resistance, and can withstand mechanical and thermal stress.     3. The metal base layer is the support member of the copper base PCB, which requires high thermal conductivity and is suitable for conventional machining such as drilling, punching and cutting.     4. Copper  base PCB  can be machined into metallized holes, but aluminum  PCB  cannot.  The network of metallized holes must be the same net

       Generally, the requirements for structure design and technology manufacturing of multi-layer electric boards are very high. The more layers, the more difficult it is, and it is suitable for more complex circuits. So what are the advantages of using multilayer circuit boards. The advantages of using multilayer boards are: 1. High assembly density and small size; 2. Shorten the connection between electronic components and increase the signal transmission speed; 3. Convenient routing; 4. For high-frequency circuits, add a ground layer to make the signal line form a constant low impedance to the ground; 5. Good shielding effect. However, the more layers, the higher the cost, the longer the processing cycle, and the more troublesome the quality inspection is. Our common computer boards usually use 4-layer boards or 6-layer boards, but now there are more than 100 layers of practical printed circuit boards. The difference between the 6-layer board and the 4-layer board is in the middle

        When doing PCBA processing,  we  occasionally encounter some boards that need to be repaired. Repair is also a very important link. Once errors occur, it may directly lead to the scrapping of the circuit board. So what should  we  pay attention to when repairing?   1.  If there are solder joint defects such as open circuit, bridge, and virtual soldering generated in the reflow or wave soldering process, it is necessary to use tools, such as BGA rework station, X-Ray, high-power microscope, etc., to remove various solder joint defects after trimming. So as to obtain qualified PCBA solder joints.     2. If the repair process needs to be heated above 110 ° C, or there are other moisture-sensitive components within 5mm of the repair area.     3.  For moisture-sensitive components that need to be reused, if hot air reflow, infrared and other repair processes are adopted through the heating solder joint of the component package, it must be baked and dehumidified according to the mois

         Both copper base PCB and aluminum PCB belong to PCB IMS boards, which are composed of circuit layers, insulating layers, and metal base layers. It has  special magnetic permeability, excellent heat dissipation, as well as good processing performance ,  high mechanical strength  and other characteristics .  And the characteristics of good processing performance and high mechanical strength. So what is the difference between copper base PCB and aluminum PCB?     1.  The base materials used are different. This is obvious. The aluminum PCB uses aluminum as the base material, while the copper base PCB uses copper as the base material.     2. T he t hermal conductivity is different.  The copper base PCB has the best thermal conductivity among the IMS boards, and the thermal conductivity is better than that of the aluminum PCB.     3.  The prices are different. Copper base PCB are the most expensive IMS boards, and aluminum PCB are relatively cheap.     4. The  technology  is differe

Aluminum PCB   is a metal substrate with good heat dissipation function. Generally, the single-sided aluminum PCB is composed of three layers, which are the circuit layer, the insulating layer and the metal base layer. It is usually used in power products, especially in the LED field. So, what are the advantages of aluminum PCB?       1. As we all know,  high temperature will affect electronic equipment ,  so it is necessary to choose a circuit board with good heat dissipation, and the aluminum  PCB  can effectively deal with heat dissipation, reduce the operating temperature of the module, and improve reliability.  Reduce the assembly area of radiators and other hardware, reduce product volume, and reduce hardware and assembly costs.     2. The aluminum PCB meets environmental requirements, is recyclable, helps save energy, and is easy to assemble.     3. Aluminum PCB, copper PCB, and iron PCB, all belong to metal substrates Comparison of the three: Aluminum PCB are much lighter in we

     Electroplating is a necessary production process in PCB production, in which horizontal plating is more functional than vertical plating, and it is easier to achieve large-scale production. So what are the advantages of horizontal plating?       1. Horizontal plating does not need to reserve a clamping position, which increases the practical area and greatly saves the loss of raw materials.     2. It can adapt to a wide range of sizes without manual installation and hanging, realize fully automatic operation, and ensure that there is no damage to the surface of the PCB board during processing, which is extremely beneficial for mass production.     3. Horizontal plating is computer controlled throughout the process to ensure uniformity of surface and hole coating on each printed circuit board under the same conditions.     4. The cleaning of the plating tank to the addition and replacement of the plating solution can be fully automated without human error, and labor costs can be re

  Why are the prices of the same PCBs in different factories different, some are expensive, some are very cheap, some are moderately priced, what causes a variety of  PCB price  differences?   This may be due to differences in materials and processes  and others.  The specific price differences are as follows.     1.  Different PCB base material result in price diversification.   For ordinary double-panel, for example, if the  board  material,  board  thickness, copper thickness, etc. are different, each of them can cause huge price difference .  In terms of solder mask, there is also a certain price difference between ordinary heat set ink and photosensitive green oil.     2.  Different surface treatment process result in price diversity.   Common surface treatments: OSP, Leaded HASL, LF HASL, gold plating, immersion gold and some combined process ect. The above is arranged by price from cheap to expensive.     3.  Different PCB have different manufacturing difficulties, resulting in