Electrostatic hazards should be paid enough attention (for your reference) With the rapid development of science and technology, the rapid rise of high-tech industries such as electronics, communications, and aerospace, especially the need for electronic instruments, equipment and equipment, such as miniaturization, multi-function and intelligence Chemical. High-density integrated circuits have become an indispensable component of the electronics industry for these requirements. Such devices have the characteristics of short line spacing, thin lines, high integration, fast operation speed, low power and high input impedance, which makes these devices more and more sensitive to static electricity, called electrostatic sensitive (ESDS) devices. The energy of electrostatic discharge (ESD) has little effect on traditional electronic components, which is difficult to detect, but these high-density integrated circuit components, whether MOS devices or bipolar devices, may be caused by electrostatic electric fields and electrostatic discharge currents. Failure, or the phenomenon of "soft breakdown" that is difficult to be discovered, leaves potential hidden dangers to the whole machine, directly affecting the quality, life, reliability and economy of electronic products. Static electricity generally refers to a static charge. Refers to the presence of unbalanced electrons on the surface of the object. The amount of surface charge is determined by the total amount of electrons that are insufficient or excessive. The surface electrons are not positively charged, and the surface electrons are negatively charged. We call the phenomenon of electric charge generation and disappearance an electrostatic phenomenon. The basic physical characteristics of static electricity are: there is a force of attraction or repulsion; there is an electric field, and there is a potential difference with the earth; a discharge current is generated.
These three situations can have the following effects on electronic components:
1. The component absorbs dust, changes the impedance between the lines, and affects the function and life of the component.
2. The element is inoperable (completely destroyed) due to electric field or current damage to the element insulation and conductor.
3. The component is injured due to the soft breakdown of the electric field or the overheating of the current, and although it still works, the life is impaired. In the above three cases, if the component is completely destroyed, it must be detected and eliminated in the production and quality test, with less impact. If the component is slightly damaged, it is not easy to be found in normal tests. In this case, it is often found to be damaged after repeated processing or even when it is used. Not only is the inspection difficult, but the loss is also difficult to predict. Static electricity is as harmful to electronic components as serious fire and explosion accidents.
Under what circumstances will electronic components and products suffer from electrostatic damage? It can be said that the entire process of electronic products from the production to the use of the threat of electrostatic damage. From device manufacturing to plug-in soldering, machine assembly, packaging and transportation to product application, it is under the threat of static electricity. In the entire electronic product production process, each small step in each stage, electrostatic sensitive components may be affected or damaged by static electricity, but in fact the most important and easily overlooked is the transmission and transportation of components. the process of. In this process, transportation is easily damaged by the static electricity generated by the external electric field (such as near high-voltage equipment, frequent worker movement, rapid vehicle movement, etc.), so the transmission and transportation process need special attention to reduce losses and avoid indifferent Dispute.