That electrostatic discharge ESD , electrostatic hazards should pay sufficient attention . With the rapid rise of the rapid development of science and technology, electronics, communications , aerospace and other high-tech industries, especially the need for instrumentation and other electronic equipment electronic products become increasingly compact , multifunctional and intelligent. High- density integrated circuit electronics industry has become indispensable to the above requirements devices . This device has a line spacing of short , fine lines , high integration , high operation speed , low power and high input impedance characteristics , resulting in more and more sensitive to static electricity such devices , called static-sensitive (ESDS) devices.
Electrostatic discharge (ESD) energy on the conventional electronic component is minimal , it is difficult to detect , but these high -density integrated circuit elements , both MOS devices, bipolar devices , or may be due to the electrostatic field and electrostatic discharge ESD current cause failure , or cause people find it difficult to be "soft breakdown " phenomenon, leaving a potential risk to the machine , directly affect the quality of electronic products, life, reliability and economy. Electrostatic generally refers to a static electric charge. Refers to uneven surface electrons from the electron deficiency or excess amount determined amount of surface charge , a positively charged surface of the electron deficiency , excess surface is negatively charged electron . We charge generation and electrical phenomena disappear process called static phenomenon . The basic physical characteristics of static electricity is: there is attraction or repulsion forces ; presence of an electric field , and the earth there is a potential difference ; produce discharge current. These three scenarios would result in the following effects of electronic components :
1 elements absorb dust , changing impedance of the line between function and affect the life element.
2 due to the electric field or current from destroying the insulating layer and the conductor element , the element is not working ( complete destruction ) .
3 due to momentary electric current produces a soft breakdown or overheating , the element of injury , although still work , but life is damaged.
Electronic components and products under what circumstances would suffer electrostatic damage it? It can be said : the whole process from production to use electronic products are threatened ESD electrostatic damage . From beneath the plug-in device fabrication assembly and welding , machine loading Union , until the product packaging and transportation applications , both in static threat. In the entire electronic product manufacturing process, each stage of every little step , static-sensitive components are likely to be affected ESD or electrostatic damage , but actually the most important thing but it is easy to neglect the element and transmission the transport process . In this process , the transport due to move easily exposed to external electric field ( such as after a near high-voltage equipment , workers move frequently, quickly moving vehicles , etc. ) to generate static electricity damage , so the transfer and transport processes require special attention in order to minimize damage and avoid indifferent disputes.
