How to strengthen the management of electrostatic protection
Software measures-strengthen the management of electrostatic protection
In the production process of electronic products, electrostatic protection is a systematic project that runs through all production links, and is a long-term key task of the factory. On the surface, this project is not suitable for delivering products and creating benefits, and it is often overlooked by people. Therefore, it is necessary for supervisors at all levels to fully realize that this work should be placed on an important agenda. To do a good job, to be detailed, and to refine the indicators to the conditions that have objectives, inspections, visibility, and touch, is to strengthen management. Summarizing management is the three tasks of “standard setting”, “system establishment”, and “inspection.”
① Establish standards for electrostatic protection one by one
The standard of static electricity protection is the legislative work of static electricity protection. It belongs to the enterprise standard. It is the fundamental work of the factory in terms of static electricity protection and the basis for the work of all production links of the factory. Therefore, it is necessary to formulate relevant standards, which generally include the following five aspects.
a. General standards for anti-static. Including: purpose; scope of use; standards for the use of various materials; standards for the management of static electricity generation; standards for the use of anti-static equipment.
b. Measures to prevent damage to semiconductors, specifications and standards of circuit board inspection tools.
c. The production line prevents the conductor from electrification and leakage protection. The method to solve the problem of the conductor being charged is to take grounding measures, mainly to stipulate the grounding requirements of various equipment, instruments, tools, etc., which include the installation of the ground wire of the production line, the ground wire of the soldering iron, the grounding of the semiconductor device box, and the human body. Grounding and installation of ground wires of test instruments, fixtures, workbenches, etc.
d. Prevent electrification of insulating objects on the production line. The main contents are tooling boards with rubber sheets, elimination of static electricity from resins and wood objects, use of anti-static work gloves, circuit board turnover boxes and electrostatic protection of components, protection of semi-finished products, use of static testers, anti-static work clothes, and work instructions Anti-static methods and specifications such as manuals and construction technical materials.
e. Electrostatic protection of semiconductors under abnormal conditions. This refers to the anti-static management measures that should be taken when abnormal situations occur in the production process, including the handling of components after falling to the ground, the operation of the circuit board inspection tooling, the operation of the test probe, the insulation coating of the terminal, etc. .
② Organizational system-formulate a management system for electrostatic protection
Once there are standards, there must be certain measures to ensure implementation. This requires a corresponding management system, including two aspects: one is the responsibility system. All functional departments, such as design, process procurement, and inspection departments, must Establish a corresponding responsibility system; the second is an inspection system, such as an anti-static patrol inspection system on the SMT production line. The inspection items, content, and frequency should be clearly stipulated in the system.
When performing testing tasks, the testing equipment specified in the standard must be used. The instruments used in the electrostatic safe working area are conventional instruments, and there are the following four types.
Static detector. This is a non-contact electrostatic voltage tester with a measurement range of: low range 0kV~ 2kV, high range 0kV~20kV, measurement accuracy ±10%.
Electrostatic voltmeter. This is also a non-contact electrostatic voltmeter, which can effectively test the voltage of charged objects on the surface of objects and human bodies. Low range OkV~20kV, high range OkV~40kV, resolution 10Vo
Wristband tester. It can check whether the wristband is invalid, the measurement range: low zone <500kQ; normal 500kQ~10Mn, high zone>10MH, error rate <20%.
Anti-static resistance checker. *
The anti-static touring inspection system on the SMT production line should be implemented conscientiously to ensure that the static state on the SMT production line is well understood. For this reason, the static electricity status on the production line must be recorded and archived.
③ Check
After the establishment of anti-static standards and regulations, in order to implement this task, a full-time or part-time anti-static supervision team must be established. There must be a full-time or part-time inspection team whose responsibility is to detect static electricity in the safe area. It requires a strong sense of responsibility, understanding of anti-static standards and rules and regulations, conscientiously doing anti-static patrol inspections, keeping anti-static safety shuts, and ensuring the safety of sensitive devices in the production process.
Through the establishment of standards, establishment and inspections, employees’ awareness of electrostatic protection must be continuously enhanced. Electrostatic protection is a systematic project, which should arouse the attention of all employees in the enterprise. All personnel on the production line, including management personnel, should be educated in electrostatic protection technology. Organizing training courses for all kinds of personnel to enable them to understand the hazards of static electricity and the basic principles of static electricity protection. At the same time, the static protection standards and anti-static process regulations formulated by the enterprise should be used as the basic teaching materials for education, especially for the production The personnel should obtain the qualification certificate to ensure that all employees pay attention to static electricity protection during the production process, so that the system engineering of static electricity protection can be truly implemented in the enterprise, eliminating the invisible killer of static electricity damage, ensuring production safety, and improving products Quality and reliability.