Problems that need attention in SMT patch processing

2020-12-14 11:31:45 hongling

The development of SMT patch processing has brought an innovation to the entire electronics industry, especially in the current environment people are pursuing miniaturization of electronic products. The perforated plug-in components used in the past could not be reduced, leading to the enlargement of the entire electronic product. SMT patch processing at this stage has brought us a new innovation. Today, the editor will tell us about the issues that need attention in patch processing.



   First: Joint specification for the development of electrostatic discharge control procedures. Contains all the necessary planning, establishment, implementation and maintenance of electrostatic discharge control procedures. Based on the historical experience of certain military arrangements and commercial arrangements, we provide guidance for handling and maintenance of sensitive periods of electrostatic discharge.


   Second: Semi-aqueous cleaning manual after welding. It includes all aspects of semi-aqueous cleaning, including chemical, production residues, equipment, technology, process control, and environmental and safety considerations.


   Third: Desktop reference manual for through-hole solder joint evaluation. Detailed descriptions of components, hole walls, and welding surfaces are described in accordance with the specifications. In addition, it also includes computer-generated 3D graphics. Covers tin filling, contact angle, tin dip, vertical filling, solder pad masking, and numerous solder joint defects.


   Fourth: Template planning guide. Provide guidance for the planning and production of solder paste and surface mount adhesive coating templates i also commented on template planning for the application of surface mount technology, and introduced the use of through-hole or flip chip components? Technology, including overprinting, double printing and staged template planning.


   Fifth: Water cleaning manual after welding. Describe the cost of making residues, the type and nature of aqueous cleaning agents, the process of aqueous cleaning, equipment and technology, quality control, environmental control, and staff safety, as well as the cost of cleanliness measurement and measurement.