Different devices have different levels of sensitivity to electrostatic discharge, or ESD. Thus, there needs to be a way to distinguish ESD-sensitive devices from those which are not as vulnerable to ESD. Each of the ESD models used in ESD sensitivity testing has its own classification system for categorizing devices according to their ESD sensitivity.
En enheds ESD-følsomhed er normalt specificeret i form af den højeste ESD-testspænding, den passerer, og den laveste ESD-testspænding, som den fejler pr. ESD-model. ESD-følsomhed udtrykkes således ofte som en række ESD-spændinger, som en enhed sikkert kan udsættes for for hver af ESD-modellerne. Følgende tabeller viser ESD-følsomhedsklassificeringsniveauerne defineret af ESD Association for hver ESD-model.
Tabel 1. ESDS-komponentfølsomhedsklassifikation - Human Body Model
(Pr. ESD STM5.1-1998)
Tabel 2. ESDS-komponentfølsomhedsklassificering - Maskinmodel
(Pr. ESD STM5.2-1999)
Tabel 3. ESDS-komponentfølsomhedsklassificering - opladet enhedsmodel
(Pr. ESD STM5.3.1-1999)
A complete ESD characterization of every new product prior to its release is highly recommended. Complete ESD characterization consists of subjecting the device to ESD testing for all of the three ESD models, i.e., HBM, CDM, MM. Data for one ESD model can not be substituted for those of the other ESD models, since good ESDS test results for one model doesn't necessarily mean that the test results will also be good for the other ESD models. Thus, a company that takes its ESD program seriously must equip itself with ESD tester(s) capable of performing the required ESD tests for each of the test models.
