CLAUSE CODE: QC35d    This clause is current as of 07/23/2017; 19:28:22
  CLAUSE TITLE: Electrostatic Discharge (ESD) Control Program


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

ESD-safe Work Area Classification

HBM ESD Sensitivity Levels

Continuous Monitors

Grounded Floor and ESD Footwear

Air Ionization

Ionizers Discharge Time

Ionizer Float Potential

Highly Sensitive

<250V to ≥50V

Optional

Optional/

Alternative to wrist strap

Mandatory

± 1000 to <± 50 V in < 20 seconds

<± 50 V

Extremely Sensitive

<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)”.