Author Archives: allaismt

The thermal conductivity of led substrate is related to the insulation layer (usually PP, thermal grease, etc.) inside the aluminum substrate, and it is one of the three criteria to measure the quality of aluminum substrate (thermal resistance and withstand voltage are the other two properties). The thermal conductivity of aluminum substrates can be measured […]

Flexible printed circuit board. The number of circuits in one FPC can exceed 100, but it only occupies the thickness of 0.2mm Although it is more expensive than flat cable, it is widely used in smart products with compact volume. Especially mobile phones, smart bracelets and other scenes. Today, the most important thing for everyone […]

“High-speed backplane and high-speed backplane connector” is mentioned in “The culprits in several high-speed PCB designs”. So how is the high-speed backplane designed? What are the design steps from beginning to end? What are the key points in each stage? The case analysis of the current period is summarized. High-speed backplane design process The detailed […]

1. Multi-layer circuit board Jafani bites copper This problem must be traced back to the copper electroplating process. It is found that if the examples of deep hole barrel plating and buried hole barrel plating with high thickness-diameter ratio can be shown that the copper thickness is more evenly distributed, this kind of Jafani’s copper […]

In the manufacturing stage of SMT SMD factory, the processing technology of lead-free reflow oven has always been a very obvious problem in PCBA production and processing. In the process of SMT chip production, high-quality lead-free solder joints can be produced, which has irreplaceable active effect in the whole process of electronic processing. However, in […]

Many people identify the quality of PCB according to the color of PCB. In fact, the color of motherboard has little to do with the performance of PCB. PCB, it’s not that the taller you look, the better you use it. The color of PCB surface layer is actually the color of solder resist. The […]

PCBA solderless press-in connection technology, also known as press-in technology, consists of malleable deformable or rigid terminals embedded in two or more sides. A kind of “moderate press-in” connection produced by the matching of metallized holes of pcb boards, which produces close point contact between the terminal and the metallized holes, and realizes electrical connection […]

The blowhole caused by PCBA plate welding, which is commonly referred to as bubble, is generally caused by reflow welding and wave welding during PCBA processing. So how to prevent blowhole caused by PCBA production and processing welding? 1. baking Bake PCB and electronic devices exposed to air for a long time to avoid moisture. […]

In the traditional assembly process of electronic devices, the wave soldering technology is generally used for the welding of PCB components with PTH. There are many shortcomings in wave soldering: 1. High-density, fine-spaced chip-mounted components cannot be spread all over the welding surface; 2. More bridging and false welding; 3, need to spray welding flux; […]

Pay attention to the welding temperature After all, the material of aluminum substrate is different. In the case of welding, there is no doubt that we should do a good job in controlling the temperature level, so as to ensure the good welding effect and reasonably prevent certain problems.To ensure that the temperature can achieve […]