Kingford focus on the high-quality PCBA order demand of "Multiple varieties, medium and small batch, and short lead time".
The milling technology of NC circuit board milling machine includes the selection of cutting direction, compensation method, positioning method, frame structure, the next cutter point, which is an important aspect to ensure the milling precision.
The traditional way to clean printed circuit boards is to use organic solvents, but CFC-113 has been banned because of its damage to the atmospheric ozone layer.
In PCB proofing, temperature sensitive elements can limit the application of reflow soldering, whether in cartridge or SMD. Therefore, selective welding can be used after reflow welding in most applications.
In PCB design, wiring is an important step to complete the product design, it can be said that the previous preparation work is done for it. PCB routing includes single - sided routing, double - sided routing and multi - layer routing.
The purpose of thawing back temperature: can make the flux and tin powder evenly distributed, so as to give full play to the various characteristics of tin paste; The viscosity and activity of the solder paste after refrigeration are different from that o
SMT SMT processing includes the following equipment: 1, board machine: 2, solder paste printing machine, 3, SPI(3D solder paste detector) : 4, SMT machine, 5, the first piece of detector: 6, reflow welding, 7, plate machine: 8, AOI detection, 9, X-Ray
PCBA processing and welding process requirements for PCB board: 1. Heat resistance, 2. PCB shape, 3. PCB size, 5. PCB process edge, 6. PCB reference identification point, 7. Plate design, 8, can withstand solvent washing
The advantages of PCBA processing clean free technology: 1, a large amount of saving cleaning labor, equipment, site, material (water, solvent) and energy consumption; 2. Save working hours and improve production efficiency; 3, advanced production technol
PCB inspection contents: ① appearance inspection: ② size measurement: ③ furnace temperature test: ④ pad welding force test: ⑤ Check the PCB board factory report
When the welding ends or pins of components are oxidized or contaminated, welding defects such as poor wetting, virtual welding and voids will occur in reflow welding. Poor coplanar properties of components will also lead to welding defects such as virtua
The heating methods of reflow welding are generally divided into two categories: one is by the red lamp and adapted tube heater; The other type is ceramic plate, aluminum plate and stainless steel plate heater.
pcba aging test standards: 1, low temperature work, 2, high temperature work, 3, high temperature and high humidity work
