Many factors affect the quality of PCBA quality, including human, machine, material factors, technological factors, environmental factors, etc. The quality of pcba process is mainly affected by the following conditions.
In the process of PCBA production, the selection of PCBA transtin is also very important. In the process of through hole plug-in, tin penetration is not good, which is easy to cause problems such as virtual welding, tin cracking and even falling parts.
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
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.
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.
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.
The design defects of PCBA are difficult or even impossible to solve in the production process. The negligence of PCB design quality control will lead to the waste of components, materials and working hours, and even cause heavy losses.
PCBA machining circuit board debugging steps and methods: 1. Board surface observation and resistance check, 2. Install components, 3. Detect power supply output voltage, 4. Preset overcurrent protection current, 5. Install and test other modules
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