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.   ...

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...

HASL and immersion tin   are common surface treatment processes for PCB, both are used for lead-free soldering. Do you know the difference between the two?       1.  Technological Process HASL: Pretreatment → HASL → Testing → Profile → Visual Inspection. Immersion Tin: Testing → Chemical Treatment → Immersion Tin → Profile → Visual Inspection.     2.  Technological Principle HASL is mainly to immerse the PCB directly into the molten  tin paste .   After being leveled by hot air, a dense tin layer will be formed on the copper surface of the PCB.   The  immersion tin   mainly uses displacement reaction to form a very thin tin layer on the PCB surface.     3.  Physical Property The thickness of the HASL tin layer is about 1um-40um, the surface structure is relatively dense, the hardness is large, and it is not easy to scratch. HASL only uses pure tin in the production process, so the surface is easy to clean, i...

With the development of electronic processing technology and electronic technology, the overall demand for PCB is increasing. Many PCB manufacturers only provided PCBA processing methods in the past, and now many manufacturers provide   PCBA one-stop service . So what are the advantages of PCBA one-stop service?   1. Customers choose PCBA one-stop service, which has great advantages in reducing the cost of purchasing materials. Because  PCBA manufacturers  can receive orders from all over the world,  the customer demand is relatively large,   so  the corresponding components are purchased in large quantities. They also have stable component suppliers who have cooperated for many years, so they can get the lowest purchase price.     2. It can reduce labor costs. If you buy materials yourself, you must have your own purchasers, including PCB purchasers and component purchasers. These are not small expenses.   ...

Blistering is one of the common quality defects in PCB production process, because of the complexity of PCB manufacturing process, some blisters will occur.   Do you know the causes of blistering on the PCB surface?       1. Some thinner substrates because  of its p oor rigidity, are not suitable for brushing with a brushing machine, so  please  pay attention to them during production and processing, So as not to cause the plate surface substrate copper foil and chemical copper between the poor bonding force caused by the surface blister.     2.  The board surface is caused by oil stains during drilling, lamination, milling and other processing processes, or other liquids contaminate the surface with dust, which will also cause blistering on the board surface .     3. PTH  electroplating has to go through a lot of chemical treatments, such as various acid-base inorganic, organic and other pharmaceutical solvents....