What are the hazards of static electricity to sensitive components?
Electrostatic discharge (ESD) is a well-known electromagnetic compatibility problem that can cause electronic devices to malfunction more seriously and can damage electronic devices. When semiconductor devices are placed or loaded into circuit modules individually, permanent damage to these devices may occur even without power. Components that are sensitive to electrostatic discharge are called Electrostatic Discharge Sensitive Components (ESDS).
Another type of failure is caused by the temperature of the node exceeding the melting point of semiconductor silicon (1415 ° C). The energy of the ESD pulse can generate localized heating, so failure of this mechanism occurs. This failure occurs even if the voltage is lower than the breakdown voltage of the medium. A typical example is that the breakdown between the emitter and base of the NPN transistor causes a sharp drop in current gain.
Functional damage may not occur immediately after the device is affected by electrostatic discharge. These potentially damaged components are often referred to as "squats" and, once used, will exhibit greater sensitivity to later electrostatic discharges or conductive transients.
It is important to pay close attention to the damage that the component can experience under undetectable discharge voltages. The human body has a feeling that the electrostatic discharge voltage is between 3000 and 5000V. However, the voltage at which the component is damaged is only a few hundred volts.
The harmful effects of electrostatic discharge were recognized in the 1970s because of the development of new technologies that made components more sensitive to electrostatic discharge damage. The damage caused by electrostatic discharge can reach several million dollars per year. As a result, many large component and equipment manufacturers have introduced expertise to reduce static buildup in the production environment, resulting in a much higher product yield and reliability. Users understand the importance of preventing electrostatic discharge damage based on their own experience. So we should pay attention to this when buying large household appliances. Pay attention to the instructions and certificate of conformity. Otherwise, it is a hidden danger to family members. When it rains and thunders. It is best to turn off the power of the household appliances to cut off the power. In case it causes unnecessary trouble. Regardless of household appliances, you should pay attention to this as long as it is a large machine related to the call.