PCB Blogger-China PCB Factory,HOYOGO

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, it can be stored at normal temperature for one year,  and the problem of surface

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.     3. It can reduce the company's  warehousing expenses . The storage of com

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.  This will not only cause cross pollution, but also cause the board poor

Although many traditional PCB can provide excellent functions, not all PCB are suitable for LED applications. In order to achieve the best performance in lighting applications, PCB for LEDs need to be designed to maximize heat transfer capabilities.       Aluminum PCB have the advantages of low power consumption, high efficiency and impressive light output, so they are loved by the lighting industry. Most high-light output LED applications use aluminum PCB, mainly because they can achieve a higher level of heat transfer. Do you know the application fiels of LED aluminum PCB?   Telecommunications equipment usually uses PCB to control their LED indicators and displays. In the telecommunications industry,  lightweight and durable PCB are often better, because aluminum  PCB  have better heat transfer characteristics than FR4 boards, so aluminum  PCB  are usually found in telecommunications lighting applications.   LED displays are very common in the automotive industry, such as dashboard i