The reasons for white spots in PCBA processing are as follows: 1. The circuit board is under inappropriate thermal stress; 2. 2. Due to the influence of mechanical force, part of the resin is separated from the glass fiber, forming white spots; 3. Some PC
Precautions for the use of moisture sensitive devices in PCBA processing:1. Ovens used for baking are required to be ventilated and able to operate under the condition of humidity less than 5%. 2. SMT components shipped in high-temperature carriers can be
Four suggestions for PCB design: 1, about positioning hole, 2, about MARK point, 3, about 5mm edge, 4, do not directly on the pad over the hole,
Although PCB automators have been around as long as engineers have known about CAD, engineers involved in designing dense boards have almost completely ignored the implementation of automated technology.
PCB manufacturing process involves circuit board manufacturing, component procurement and inspection, patch processing, plug-in processing, program firing, testing, aging and a series of processes.
After the manufacturing of PCB circuit boards, there is a shelf life, beyond which the PCB needs to be baked, otherwise it is easy to cause the problem of PCB board bursting when the SMT is put on line for production.
Many companies use tracking barcodes to allow the plant's field information management system to track the quality of PCBS produced. From the original label paper printed bar codes to today's laser printed bar codes can achieve this purpose.
Why do you want to talk about the schematic principle in detail, because the schematic diagram contains a lot of information to draw PCB, such as the access point of the element pin, the current size of the node network, etc., see clearly the schematic di
Any non-standard operation in any link will seriously affect the quality of PCBA patch. The quality of PCBA patch can be controlled through the key links of steel mesh making, solder paste control, furnace temperature curve setting and AOI detection.
In the process of PCB processing, in addition to batch welding by reflow welding and wave soldering, manual welding is also needed to produce complete products.
The FPC board is soft and not vacuum packed when leaving the factory. It is easy to absorb moisture in the air during transportation and storage. It needs to be pre-baked before SMT line casting to slowly force out the moisture.
During the industry boom, many PCB processing manufacturers will carry out PCBA outsourcing processing under the condition that they cannot normally schedule production. Send PCBA orders to other competent PCBA manufacturers.
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