PCBA Tech - Improving the quality of smt and the links that need attention

Improve the quality of smt patch processing products

The smt patch processing technology has been widely used in the electronics industry. The product quality of smt patch processing is related to the actual effect of product forming, and it is also a test of corporate strength. Improving the quality of smt patch processing products is the overall goal of every smt factory.

1. Select enterprise technical personnel. Establish an internal product quality organization network within the enterprise, provide timely and accurate product quality feedback, select product quality personnel to serve as product quality inspectors on the production line, and the management is still managed by the product quality department; to avoid other factors interfering with the determination of product quality.

2. Ensure the accuracy of testing and maintenance of equipment and equipment. Check and maintain the product through the necessary equipment and equipment such as multimeter, anti-static wrist, soldering iron, ict and so on. Therefore, the product quality of the equipment itself will directly affect the quality of the produced products. In order to ensure the reliability of the equipment, inspections and measurements should be carried out in a timely manner in accordance with regulations.

3. Formulate product quality regulations. The Quality Department shall formulate necessary product quality related rules and regulations and a departmental responsibility system, restrict avoidable quality accidents through laws and regulations, and give clear rewards and punishments, and participate in product quality assessment by economic means; and establish a monthly quality within the enterprise prize.

4. The implementation of management measures. Quality management, in addition to strictly controlling the quality of the production process, it also takes the measures of inspectors to sample and inspect (or comprehensively inspect) the outsourced parts before entering the warehouse, determine that the pass rate does not meet the requirements of the national standard, and return the goods. And record the inspection results in writing.

5. Set product quality process control points. In order to ensure the normal progress of smt processing, it is necessary to strengthen the quality inspection of each process to monitor its operating status. Therefore, it is particularly important to establish product quality control points after some key processes in order to discover and correct quality problems in the subsequent processes in time to prevent unqualified products from entering the next process.

SMT processing plants need to pay attention to the links in the patch processing

PCBA is actually what we call a circuit board in a general sense. Strictly speaking, a complete PCBA circuit board is not a simple board, it is a collection of high-tech. From up to hundreds of thousands of light-years out of the aircraft, as small as the remote control used at home, the chip is as small as 5nm, and then integrated into the circuit board through SMT chip processing and DIP plug-in soldering to achieve various Kind of function.

PCBA is actually what we call a circuit board in a general sense. Strictly speaking, a complete PCBA circuit board is not a simple board, it is a collection of high-tech. Up to hundreds of thousands of light-years away from the aircraft, as small as the remote control used at home, the chip as small as 5nm, and then integrated into the circuit board through smt chip processing and DIP plug-in soldering to achieve various Kind of function.

The entire process starts from the PCB circuit board to the SMT chip processing, various inspections and tests, and only qualified PCBA circuit boards can flow into the market. Among them, only the SMT link requires 9 inspection processes. What should we pay attention to in the production process of such a process? Today, I would like to share with you what aspects of the smt processing factory need to pay attention to in the patch processing:

1. The temperature and humidity of the production workshop. According to the industry standard of the electronic processing workshop, it stipulates that the ambient temperature value of the SMT processing plant is between 25±3 degree Celsius, and the humidity value is between 0.01%RH. Because there are many precision components in the whole processing process, they are extremely sensitive to temperature and humidity. At the same time, relative humidity is very beneficial to the management and handling of static electricity.

2. Professional operators. Because the process flow of this link of SMT must be meticulous, all the processes seem very simple. However, if the operator is not very skilled, it is easy to happen because of inadequate detail control, the reliability of SMT solder joints is not high, and the defect rate of solder joints is high. Therefore, SMT placement machines need to undergo professional training before they can be officially employed. Trained employees can not only improve production efficiency, but also increase the yield rate.

3. The volume ratio of the most commonly used tin powder particles to flux in the solder paste for SMT patch processing is about 1:1. Before the SMT chip processing starts, the solder paste must be reheated (the characteristics and requirements of the solder paste make it necessary to store at a low temperature) and fully stirred. The most important thing is that the temperature recovery cannot be performed by super-normal heating.

4. After PCBA processing is completed, if the customer does not pick up the goods in time or needs to be stored temporarily, first pay attention to the storage method. After that, we must consider the customer's shipping channels to choose the appropriate packaging method and degree. And pay attention to the dryness and wetness of the environment, so as to avoid dampness, oxidation and other defects in the product that is not equipped with a casing and is not coated with a three-proof paint during this process.