Smart home motherboard SMT patch processing

Smart home motherboard SMT patch processing

Dongguan Tangxia PCBA processing precautions

Dongguan Tangxia PCBA processing is a strict process. If you don't pay attention to it, there will be production accidents. If it is light, the circuit board will be damaged, resulting in economic losses; If the situation is serious, safety accidents will occur and threaten personal safety. Therefore, during the processing of Dongguan Tangxia PCBA, designers and workers must strictly understand the precautions during the processing of Dongguan Tangxia PCBA:

1. The minimum distance between the PCBA processed copper foil and the plate edge of Dongguan Tangxia is 0.5mm, the minimum distance between the components and the plate edge is 5.0mm, the minimum distance between the pad and the plate edge is 4.0mm, the minimum gap between the single plate copper foil is 0.3mm, and the minimum gap between the double plate copper foil is 0.2mm. (when designing the double-sided board, please pay attention to the parts of the metal shell. If the shell needs to contact the printed circuit board during insertion, the pad on the top layer cannot be opened and must be sealed with screen printing oil or solder resist oil.)

Dongguan Tangxia PCBA processing which good

2. Dongguan Tangxia PCBA processing electrolytic capacitor is strictly prohibited from contacting heating elements, such as transformer, thermistor, high-power resistor and radiator. The minimum distance between the radiator and the electrolytic capacitor is 10mm, and the distance between other components and the radiator is 2.0mm. Minimum line width: single board 0.3mm, double-sided board 0.2mm (edge copper foil 1.0mm).

3. There shall be no copper foil (except grounding) and components (or as required by the structural drawing) within 5mm of the radius of the screw hole. Generally, the gasket size (diameter) of Dongguan Tangxia PCBA processing through-hole mounting assembly is twice that of the hole. The minimum size of double-sided paperboard is 1.5mm, and the minimum size of a single panel is 2.0mm (if a circular pad cannot be used, a circular pad at the waist can be used.)

4. The center distance of the backing plate is less than 2.5mm. There shall be a silk screen oil package around the adjacent backing plate processed by Dongguan Tangxia PCBA, and the width of the silk screen oil is 0.2mm. For the parts to be welded after passing through the tin furnace, the solder pad shall open the tin in the opposite direction to the direction of tin passing through. 0.5mm to 1.0mm, mainly used for middle and rear welding pads on one side to avoid blockage when passing through the furnace.

5. In the design of large-area printed circuit board (more than 500 cm), in order to prevent the printed circuit board from bending when passing through the tin furnace, a gap of 5 mm to 10 mm should be left in the middle of the PCBA processed printed circuit board in Dongguan Tangxia to avoid placing components (wireable), so as to add slats when passing through the tin furnace to prevent bending. In order to reduce the short circuit of solder joints, it is forbidden to open the solder resist window for all double-sided plates and vias.

The above are the precautions for Dongguan Tangxia PCBA processing. I hope it will be helpful to you. If you want to know more about Dongguan Tangxia PCBA processing, please click our website to browse! Dongguan xingenyu Electronics Co., Ltd. xingenyu electronics is a powerful manufacturer specializing in SMT patch processing, Dongguan Tangxia PCBA processing, dip plug-in post welding processing, cob bonding processing, electronic product assembly processing and patch OEM / ODM OEM.