PCB Blogger-China PCB Factory,HOYOGO

Compared with FR4, the aluminum   PCB  can minimize the thermal resistance, so that the aluminum  PCB   has excellent thermal conductivity.   aluminum pcbs can be divided into 5 categories: single layer aluminum PCB, multilayer aluminum pcb, mixed aluminum pcb, through hole aluminum pcb, and flexible aluminum pcb.       1.  Single Layer Aluminum PCB Singl e layer   aluminum pcb  is the most common one. Compared with other types of  aluminum pcb , its  technology  process is simple, and its applications are particularly wide. It is often used in LED lighting products.  Generally, a single layer pcb is composed of a 3 layer structure, which is a circuit layer (copper foil), an insulating layer and a metal base layer.     2.  Multilayer Aluminum PCB In the high-performance power supply market, multilayer  aluminum pcb   are made of multilayer thermally conductive dielectrics.   The...

C eramic PCB   is made by bonding the copper foil and the ceramic substrate together in a high temperature environment.   Its bonding force is strong, the copper foil will not fall off, and the reliability is high. Its performance is stable under the environment of high temperature and high humidity, so it is widely used in three fields.       1. Automotive electronics industry Ceramic PCB is very important in improving the overall quality of automotive sensors.  The material of the sensor chip is generally silicon, and the thermal expansion coefficient of ceramics and the chip are close, and will not cause too much deformation when the temperature difference changes drastically to cause the circuit to be unsoldered. When a car is running, the internal parts of the car body are in a very harsh environment, and they are often exposed to high temperature and strong corrosion. Ceramic PCB uses inorganic non-conductive ceramic as the  base m...

Ceramic PCBs are better than ordinary PCBs due to their heat dissipation performance, current - carrying capacity, insu lativity , coefficient   of thermal expansion , etc. so they are widely used in various fields. So what are the application areas of ceramic PCBs?       1.  High-power power electronic module High-power semiconductor modules are a combination of certain functions and modes.  Whether it is an insulated gate bipolar transistor (IGBT) or a DC high-power module, ceramic PCB is one of the main core components and has a very large heat dissipation requirement.  No matte r how  heat  is  generated, the first contact point of the heat is the substrate, so aluminum nitride ceramic PCB is undoubtedly the best choice.     2.  Solar panel components Ceramic PCB uses ceramic  chip  as substrate  and does  no t  requir e an  insulation layer . The heat on the copper circuit is directly con...

  In the PCB manufacturing process, the role of the solder mask is to protect the copper foil from being exposed to the outside. Coat a permanent protective film on the surface of the PCB to selectively shield the wires so that the graphics are not damaged and there will be no short circuit occurs during solder mask. There are many problems when using solder mask ink. Do you know what to pay attention to when using solder mask ink?       1. Before using the solder mask ink, please stir it evenly by hand or mechanically.  In order to prevent  air immersion in the solder mask ink during the mixing process and generate bubbles,  the ink needs to be  left  for a period of time before use.     2. If the solder mask ink needs to be diluted, please mix it first and then check its viscosity.  It must be stored separately after use.  Please do not mix the solder mask ink on the mesh board with the unused solder mask ink.   ...

Wave soldering is a soldering  technology   used for PCB mass manufacturing, mainly used for soldering through-hole components. The solder is usually a mixture of metals.   So what problems should be paid attention to in the  PCB wave soldering   technology?       1.  Before wave soldering, please check the operation of the equipment, the quality of the PCB to be soldered and the condition of the plug-in.     2. If there is green oil in t he component hole, it will lead poor tin plating in the hole. So, please note that the green oil in the hole does not exceed 10% of the hole wall.     3. If the thickness of the coating on the hole wall of the component is not enough, it will also cause poor tin plating in the hole, so the thickness of the hole wall should be greater than 18 μ m.       4. Please note that the hole wall not to be too rough, otherwise it may cause false welding or poor welding in the hole. ...

PCB is an extremely important basic assembly component of electronic equipment, and it is widely used in various electronic equipment such as household appliances, instrumentation, and computers.   So after getting the PCB, if we want to extend the service life of electronic products, how should we  maintain PCB ?       1.  Before maintenance, please check the entire PCB for bulging or leakage of electrolytic capacitors. If these conditions occur, you need to replace the new PCB in time.     2.  When performing random checks on the electrolytic capacitor capacity, if the electrolytic capacitor capacity is much lower than the nominal capacity, it needs to be replaced. The service life of the electrolytic capacitor is generally about ten years. If it reaches a certain number of years, please replace it to ensure that the PCB can maintain the best working performance.     3. The dust on the PCB needs to be cleaned every three mont...

With the continuous development of the electronics industry, the technical level of PCB is also rising. Common  surface treatment  technology  include  HASL(Lead Free HASL and HASL) , immersion gold, gold plating, OSP, etc.  HASL  is to coat a layer of tin-lead alloy on the copper surface to prevent the copper surface from being oxidized ,  and t hen  provide a good soldering base for subsequent assembly.  Do you know  the difference between lead free  HASL  and  HASL ?       1. Lead-free  HASL   belongs to  environmentally  protection  process and does not contain harmful substances "lead" ; HASL is not   an environmentally   protection   process   and   contains harmful substance "lead", which is  harmful   to   human body  for  long-term use.     2. The lead content of lead free  HASL  s...