CIS CIS ESD Control & Protection

Question 1

What does 'ESD' stand for in electronics manufacturing?

Accepted Answer

Electrostatic Discharge

Answer

ESD stands for Electrostatic Discharge, which is the sudden flow of electricity between two objects with different electrostatic charges.

Question 2

Which IPC/ESD standard governs ESD control programs for electronics manufacturing?

Accepted Answer

ANSI/ESD S20.20

Answer

ANSI/ESD S20.20 is the primary standard for developing ESD control programs for electronics manufacturing environments.

Question 3

What is an EPA (ESD Protected Area)?

Accepted Answer

A designated zone where ESD-sensitive devices are handled with ESD control measures in place

Answer

An EPA is a defined area where ESD-sensitive devices are handled and all personnel, equipment, and materials meet ESD control requirements.

Question 4

What is the typical surface resistance range for ESD dissipative materials?

Accepted Answer

1 × 10⁴ to 1 × 10¹¹ ohms/square

Answer

ESD dissipative materials have a surface resistance of 1 × 10⁴ to 1 × 10¹¹ ohms/square, allowing slow, controlled discharge of static charges.

Question 5

Which ESD failure mode occurs when a device appears to function but has hidden latent damage from a prior ESD event?

Accepted Answer

Latent defect

Answer

A latent defect is hidden damage from an ESD event that does not immediately cause failure but may cause the device to fail prematurely in the field.

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