Anti static technical index requirements in electronic produ

ESD stands for electrostatic discharge in English, which means "electrostatic discharge".

 

ESD is a discipline formed since the middle of this century to study the generation and attenuation of static electricity, electrostatic discharge model, 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). In recent years, with the rapid development of science and technology, the wide 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. Human body type refers to the friction charge generated by the friction between the body and clothes when the human body moves. When people hold ESD sensitive devices without first dragging the charge to the ground, the friction charge will move to ESD sensitive devices and cause damage.

 

2. The charging type of microelectronic devices means that these ESD sensitive devices, especially for plastic parts, will generate friction charges in the process of automatic production, and these friction charges will be quickly discharged to the highly conductive solid grounding surface through low resistance lines, resulting in damage; Or damage is caused by electrifying the metal part of ESD sensitive device through induction.

 

3. The field sensing type is surrounded by a strong electric field, which may come from plastic materials or human clothes, and electron conversion will occur across the oxide layer. If the potential difference exceeds the dielectric constant of the oxide layer, an arc will be generated on the side to destroy the oxide layer, and the result is a short circuit.