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ESD Awareness Booklet

CHARLESWATER CAN HELP YOU WITH YOUR ESD CONTROL PROGRAMME PLAN PER EN 61340-5-1

“The Organization shall prepare an ESD Control Program Plan that addresses each of the requirements of the Program. Those requirements include:

  • Training
  • Compliance Verification
  • Grounding / Equipotential Bonding Systems
  • Personnel Grounding
  • EPA Requirements
  • Packaging Systems
  • Marking”
[EN 61340-5-1 Edition 1.0 2007-08 clause 5.2.1]

“Each company has different processes, and so will require a different blend of ESD prevention measures for an optimum ESD control program. It is vital that these measures are selected, based on technical necessity and carefully documented in an ESD control program plan, so that all concerned can be sure of the program requirements.” [EN 61340-5-1 Edition 1.0 2007-08 Introduction]

To view the Charleswater ESD Awareness Booklet Click Here.

Request a sample of our ESD Awareness Booklet – Click Here.

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ESD Control Program Considerations when Dealing with Class Zero Items

ANSI/ESD S20.20 Foreword states:

  • “This standard covers … electrical or electronic parts, assemblies and equipment susceptible to damage by electrostatic discharges greater than or equal to 100 volts Human Body Model (HBM).”
  • “When handling devices susceptible to less than 100 volts HBM, more stringent ESD Control
    Program Technical Requirements may be required, including adjustment of program Technical
    Element Recommended Ranges.”

HMB Classification Class 0 is:
Per ESD-STM5.1 Human Body Model (HBM) Table 1 Class 0 has ESD Voltage Range < 250 Volts
Basically, to control the environment to decrease the probability of ESD damage in “Class Zero”
situations, involves increasing ESD protective redundancies and periodic verifications to those ESD
Control technical elements.

Improved Grounding

  • Personnel: Decrease Wrist Strap and ESD Footwear upper limit permitted (The ESD Association has test data showing charge on a person is less as the path-to-ground resistance is less) The use of continuous monitors, smocks, use / increased use of ESD flooring, sole or full coverage foot grounders (HBM & CDM)
  • Worksurfaces: Dissipative (CDM) i.e. change < 10^9 to a requirement of 10^6 to 10^8 ohms
  • Bonded grounds – Carts, shelves, equipment
  • Conductors: Minimizing isolated conductors like devices on PC Boards (CDM)

To see examples of Wrist Straps capable of dealing with class zero environments Click Here

To see examples of Grounding Cords capable of dealing with class zero environments Click Here

Minimize Charge Generation
The best form of control is to minimize charge generation. Grounding and ionization eliminate charges once generated. Shielding protects from generated charges.

  • Personnel – Low Charging floor finish
  • Surfaces – Use of low charging (anti-static) topical treatments

Insulators

  • Eliminate as best as possible all non-process necessary insulators
  • Topically treat where ever possible insulators that cannot be removed
  • Consider use of ESD Chairs or treat to reduce charge generation
  • Shield charges on clothing by using ESD Smocks

To continue reading ESD Control Program Considerations when Dealing with
Class Zero Items Click Here