CIS ESD Control & Protection Flashcards

What is the Charged Device Model (CDM) in ESD testing?

Answer: A test simulating static buildup on a component from sliding in a tube or tray, then rapid discharge when the pin contacts a grounded surface

CDM simulates ESD events where a component itself becomes charged (e.g., sliding in a tube) and then rapidly discharges through its own pins when they contact a grounded surface.

Which ESD control element provides the primary grounding path for operators working at a bench?

Answer: ESD wrist strap connected to a common point ground

The ESD wrist strap connected to a common point ground (CPG) is the primary grounding element for seated operators working at a bench.

ESD training for personnel working in an EPA should be conducted:

Answer: At initial hire and refreshed at least annually

ANSI/ESD S20.20 requires initial ESD training upon hire and annual refresher training to maintain awareness and compliance.

What is the purpose of common point grounding (CPG) in an ESD control system?

Answer: To connect all grounded items to the same electrical reference point, preventing potential differences that cause ESD events

Common point grounding connects all ESD control elements (mats, wrist straps, equipment) to the same reference potential, eliminating voltage differences that can cause ESD discharge.

Which packaging material provides BOTH electrostatic shielding AND dissipative properties for transporting ESD-sensitive assemblies?

Answer: Metalized shielding bags

Metalized shielding bags (Faraday cage bags) provide an outer conductive layer that shields against electrostatic fields while the inner dissipative layer prevents charge buildup.

What does 'ESD susceptibility' of a component refer to?

Answer: The voltage threshold below which the component can be damaged by electrostatic discharge

ESD susceptibility refers to the minimum voltage level that can damage a component, with more susceptible devices being damaged at lower ESD voltages.