The meaning of ESD
ESD stands for English ElectroStatic Discharge, which means "electrostatic discharge". ESD was formed in the middle of this century to study the generation and attenuation of static electricity, electrostatic discharge models, electrostatic discharge effects such as current heat (spark) effects (such as ignition and explosion caused by static electricity), and electromagnetic effects (such as electromagnetic interference). Subject. In recent years, with the rapid development of science and technology, the widespread application of microelectronic technology and the increasingly complex electromagnetic environment, more and more attention has been paid to the electromagnetic field effects of electrostatic discharge such as electromagnetic interference (EMI) and electromagnetic compatibility (EMC).
Three types:
1. The human body type means that the friction between the body and the clothes generates a triboelectric charge when the human body moves. When people hold ESD-sensitive devices without first placing charge on the ground, the triboelectric charge will move to the ESD-sensitive device and cause damage.
2. The charged type of microelectronic devices refers to these ESD-sensitive devices, especially for the materials, when the frictional charge is generated during the automated production process, and these frictional charges are quickly discharged to the highly conductive through the low-resistance line. A solid grounded surface, causing damage; or by sensing the metal portion of the ESD-sensitive device to be charged and causing damage.
3. The field type is surrounded by a strong electric field, which may come from plastic materials or human clothes, where electron conversion occurs across the oxide layer. If the potential difference exceeds the dielectric constant of the oxide layer, an arc is generated on the side to destroy the oxide layer, and as a result, it is short-circuited.
4. Others include: machine mode, field enhancement model, human body metal model, capacitive coupling model, and floating device model.