SMD LED lights are the most important and common components in LED related products such as LED strips and LED boards. The welding quality of SMD LED light directly affects the quality and life of lighting products. Similar to the PCB BGA, the SMD LED lights are also soldered to the LED strips and LED boards, similarly, there will also be welding problems such as solder voids. LED [...]

PTH (Plating Through-hole) is a common process on a printed circuit board (PCB), but the surface of the hole drilled directly on the PCB is only resin, which is not conductive. Therefore, we plated a layer of copper on the surface of the drill hole, so that different copper foil layers can conduct electricity. through-hole PTH When we insert the pins of the components into [...]

Flat no-leads packages such as quad-flat no-leads (QFN) and dual-flat no-leads (DFN) physically and electrically connect integrated circuits to printed circuit boards. Flat no-leads, also known as micro leadframe (MLF) and SON (small-outline no leads), is a surface-mount technology, one of several package technologies that connect ICs to the surfaces of PCBs without through-holes. A QFP or Quad Flat Package is a surface-mounted integrated circuit package with "gull wing" [...]

The X-ray inspection system is most used to test the quality of a printed circuit board (PCB) soldering. BGA is the most important component of a PCB. Its soldering quality directly affects the quality and function of the PCB. So, what are the BGA soldering defects? How can it be identified as a defect? During the BGA soldering process, affected by factors such as the amount of printed tin, [...]

If you have read the previous two articles that introduced closed and open micro-focus X-ray tubes, you may already know the fundamental difference between them: whether the tube can be opened to replace the filament. Below, we use a comparison table to understand the difference between them: Type Closed Open Price >20000USD >80000USD Lifetime >10000h 500-1000h each filament Tube voltage <150kV >160kV Focal spot 5μm 0.2μm X-ray angle ≤100° [...]

X-ray inspection system’s tilt function is usually implemented in two ways. One is the tilt of the flat panel detector. Wellman X-ray inspection system X-6800 uses this method. The other is the tilt of the table. Earlier models launched by some manufacturers use this method because their X-ray inspection system uses heavy image intensifiers to receive X-rays. The figure below is a schematic diagram of the tilt of the [...]