CIS ESD Control & Protection Flashcards
6 cards from real CIS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CIS ESD Control & Protection flashcards as text
What is the Human Body Model (HBM) used for in ESD testing?
Answer: Simulating ESD events from a charged person touching a component
The Human Body Model simulates an ESD event when a charged person (modeled as a 100 pF capacitor discharged through 1.5 kΩ) touches an electronic component.
What color are most standard ESD protective bags and packaging materials?
Answer: Pink or metallic shielding (silver/gray)
ESD-protective packaging is typically pink (for dissipative poly bags) or metallic silver/gray (for shielding bags that protect against electrostatic fields).
What is the maximum acceptable voltage threshold for an ESD wrist strap continuous monitor alarm (upper limit)?
Answer: 250V
Most ESD wrist strap continuous monitors alarm when the operator's body voltage exceeds 250V, signaling a grounding failure.
Which ESD model most closely simulates the discharge from a metal tool or conductive object touching a component pin?
Answer: Machine Model (MM)
The Machine Model (MM) simulates discharge from metal objects like tools, fixtures, or automated handling equipment contacting a component.
What does an ionizer (air ionizer) do in an ESD control program?
Answer: Neutralizes static charges on insulative surfaces and isolated conductors that cannot be grounded
An ionizer produces positive and negative ions that neutralize static charges on surfaces that cannot be directly grounded, such as plastic parts or component bodies.
According to ANSI/ESD S20.20, floor materials in an ESD Protected Area must have a resistance-to-ground of no more than:
Answer: 1 × 10⁹ ohms
ANSI/ESD S20.20 requires ESD flooring to have a resistance-to-ground of no more than 1 × 10⁹ ohms (1 gigaohm) to ensure static charge dissipation.