SMT chip processing of smart home motherboard

SMT chip processing of smart home motherboard

Precautions for PCBA processing in Dongguan Tangxia

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

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

Which is better for Dongguan Tangxia PCBA processing

　　 2. Dongguan Tangxia PCBA processing electrolytic capacitors are strictly prohibited from contacting heating elements, such as transformers, thermistors, high-power resistors and radiators. The minimum distance between the heat sink and the electrolytic capacitor is 10 mm, and the distance between other components and the heat sink is 2.0 mm. Minimum line width: single board 0.3 mm, double board 0.2 mm (edge copper foil 1.0 mm).

　　 3. There should be no copper foil (except grounding) and components (or structural drawing requirements) within 5 mm of the screw hole radius. Generally, the size (diameter) of the PCBA processed through-hole mounting assembly in Tangxia Dongguan is twice that of the hole. The minimum size of double-sided cardboard is 1.5 mm, and the minimum size of a single panel is 2.0 mm (If a round pad is not available, a round pad for the waist can be used.)

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

5. In the design of large-area printed circuit boards (about 500 cm or more), in order to prevent the printed circuit board from bending when passing through the tin furnace, there should be a gap of 5 mm to 10 mm in the middle of the printed circuit board processed by PCBA in Dongguan Tangxia. So as not to place components (can be routed), so as to add slats to prevent bending when passing through the tin furnace. In order to reduce the solder joint short circuit, it is forbidden to open the solder mask window on all double-sided boards and vias.

　　The above is the Dongguan Tangxia PCBA processing precautions, I hope that after reading can help you, if you still want to learn more about Dongguan Tangxia PCBA processing related information, please click on our company website to browse! Dongguan Xing Enyu Electronics Co., Ltd. Xing Enyu Electronics is a Dongguan Tangxia company specializing in SMT chip processing, Dongguan Tangxia PCBA processing, DIP plug-in post-welding processing, COB bonding processing, electronic product assembly processing, chip OEM/ ODM OEM's powerful processing manufacturer.