Contents
How do you test for ESD?
The air method ESD testing involves moving a charged generator or discharge object such as an ESD gun towards the device being tested. There are many variables that can impact ESD testing. These include humidity, the speed of the discharge object towards the test device and temperature.
What is ESD and how do I identify it?
Short for electrostatic discharge, ESD is one of the few things you can do to damage or destroy your computer or parts in your computer. Like the shock you receive when rubbing your feet on the carpet and touching something metal, ESD can occur when working in your computer and can cause damage to components.
What is ESD level?
Electrostatic Discharge (ESD) Sensitivity Classification Levels. ESD Sensitivity Classification Levels. 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.
What are the ESD models?
There are several ESD models including charged device model (CDM), machine model (MM), and human body model (HBM). Of these, the HBM is most commonly used to test and rate capacitors. The CDM is one of the most neglected models. This ESD event occurs when a device slides down a tube, bag, or similar source.
What are the ESD sensitivity levels for mm?
When checking components to the Machine Model (MM), the test replicates MM failures and tells you the MM ESD sensitivity levels for your devices. The criteria is 200 pF at nominal 0 ohms. ESDS Component Sensitivity Classification for the Machine Model (Per ESD-STM5.2) Each component in your company should be fully classified using HBM and CDM.
What are the models and test procedures for ESD?
In Part Five, we will cover the models and test procedures used to characterize, determine, and classify the sensitivity of items to ESD. Today, these test procedures are based on the two primary models of ESD events: Human Body Model (HBM) and Charged Device Model (CDM).
How does the SCS em eye detect ESD?
An ESD Event Detector like the SCS EM Eye (838-1158) will help detect most ESD events. It detects the magnitude of events and using filters built into the unit, it can provide approximate values for some ESD events for models (CDM, MM, HBM) using proprietary algorithms.
What are the different types of ESD classifications?
There are three main classifications based on three different ESD models. There are detailed standards available from the ESD Association: Human Body Model or HBM [100 pF @ 1.5 kilohms]: ANSI/ESDA-JEDEC JS-001-2010. Charge Device Model or CDM [4 pF/30 pF]: ESD DS5.3.1. Machine Model or MM [200 pF @ 0 ohms]: ESD STM5.2.