PCB Blogger-China PCB Factory,HOYOGO

  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.     3. The temperature of the solder mask ink  should be kept at 20-25 ℃ a

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.     5. Please note to check the tooling hole, do not let the holes shift. If the

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 months. It is necessary to clean the dust on PCB every three mo

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  shall not exceed 0.5,  but  the lead content of  HASL  shall reach 37 .     3. From the surface of the tin,  HASL  is brighter  and  lead-free  HASL  is darker ; The wettability of