QC35d - Electrostatic Discharge (ESD) Control Program:
General Requirement
For all ESD sensitive Electrical, Electronic, and Electromechanical (EEE) devices, the Subcontractor shall properly handle, package, and identify in accordance with ANSI/ESD S20.20-2007 including all requirements of Section 8.3 with the exception that air ionizers and grounded flooring and footwear shall be as in Table A-1.
- These additional items/actions are forbidden:
- Pink poly static dissipative materials
- Cloth wrist straps
- Aluminized duct tape
- Anti-static sprays
- Using garments to achieve grounding
- These actions are mandatory:
- Daily verifying of electrical tools’ resistance in according with Annex A of ANSI/ESD S20.20-2007
- Discharging of cables by shorting and grounding or using air ionizers prior to mating
- Handling requirements from Table A-1
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ESD-safe Work Area Classification
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HBM ESD Sensitivity Levels
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Continuous Monitors
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Grounded Floor and ESD Footwear
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Air Ionization
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Ionizers Discharge Time
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Ionizer Float Potential
|
|
Highly Sensitive
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<250V to ≥50V
|
Optional
|
Optional/
Alternative to wrist strap
|
Mandatory
|
± 1000 to <± 50 V in < 20 seconds
|
<± 50 V
|
|
Extremely Sensitive
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<50V to ≥20V
|
Optional
|
Mandatory
|
Mandatory
|
± 1000 to <± 20 V in < 15 seconds
|
<± 20 V
|
|
Critical
|
<20V
|
Mandatory
|
Mandatory
|
Mandatory
|
± 1000 to <± 5
V in < 10 seconds
|
<± 5 V
|
Table A-1: HBM ESD Sensitivity Levels and Requirements for Continuous Monitors, Footwear, and Performance of Air Ionizer
Information
- ESD sensitivity is defined using the Human Body Model (HBM) – Component Level of ANSI/ESDA/JEDEC JS-001-2012.
- ANSI/ESD S20.20 is for the “Development of an Electrostatic Discharge Control Program for Protection of Electrical and Electronic Parts, Assemblies and Equipment (excluding electrically initiated Explosive Devices)”.