ANSI ESD-S20.20-2021-EN.pdf - 第11页
ANSI/ESD S20. 20- 2021 3 6.2 ESD Control Program Ma nager or Coordinator The Organization shall assign an E SD co ntrol prog ram manager or coordinator to verify the compliance of the Progr am per the requirem ents of th…
ANSI/ESD S20.20-2021
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ANSI/ESD STM97.1, Footwear/Flooring System – Resistance Measurement in Combination with
a Person
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ANSI/ESD STM97.2, Footwear/Flooring System – Voltage Measurement in Combination with a
Person
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ANSI/ESD S541, Packaging Materials
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MIL-STD-2073-1, Department of Defense Standard Practice for Military Packaging
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4.0 DEFINITIONS
The terms used in the body of this document are in accordance with the definitions found in ESD
ADV1.0, ESD Association's Glossary of Terms, available for complimentary download at
www.esda.org. For the purposes of this standard, the following definitions apply:
conductor. A material that measures less than 1.0 x 10
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ohms point to point.
ESD control items. All the items, materials, devices, tools, and equipment used within an EPA for
the control of static electricity. (See also ESD technical elements).
insulator. Any material that measures greater than or equal to 1.0 x 10
11
ohms by ANSI/ESD
STM11.11, ANSI/ESD STM11.12, or ANSI/ESD STM11.13.
isolated conductor. A conductor that measures greater than or equal to 1.0 x 10
9
ohms from the
contact point (where the ESDS item will be contacted) to ground.
unprotected ESDS item. Any ESDS item without ESD protective packaging or coverings.
worksurface. Any surface where any type of work or processing is performed on an unprotected
ESDS item.
5.0 PERSONNEL SAFETY
THE PROCEDURES AND EQUIPMENT DESCRIBED IN THIS DOCUMENT MAY EXPOSE
PERSONNEL TO HAZARDOUS ELECTRICAL CONDITIONS. USERS OF THIS DOCUMENT
ARE RESPONSIBLE FOR SELECTING EQUIPMENT THAT COMPLIES WITH APPLICABLE
LAWS, REGULATORY CODES, AND BOTH EXTERNAL AND INTERNAL POLICY. USERS
ARE CAUTIONED THAT THIS DOCUMENT CANNOT REPLACE OR SUPERSEDE ANY
REQUIREMENTS FOR PERSONNEL SAFETY.
GROUND FAULT CIRCUIT INTERRUPTERS (GFCI) AND OTHER SAFETY PROTECTION
SHOULD BE CONSIDERED WHEREVER PERSONNEL MIGHT COME INTO CONTACT WITH
ELECTRICAL SOURCES.
ELECTRICAL HAZARD REDUCTION PRACTICES SHOULD BE EXERCISED, AND PROPER
GROUNDING INSTRUCTIONS FOR EQUIPMENT SHALL BE FOLLOWED.
THE RESISTANCE MEASUREMENTS OBTAINED THROUGH THE USE OF THESE TEST
METHODS SHALL NOT BE USED TO DETERMINE THE RELATIVE SAFETY OF PERSONNEL
EXPOSED TO HIGH AC OR DC VOLTAGES.
6.0 ESD CONTROL PROGRAM
6.1 ESD Control Program Requirements
The Program shall include both administrative and technical requirements as described herein. The
Program shall document the lowest level(s) of device ESD sensitivity that can be handled. The
Organization shall establish, document, implement, maintain, and verify the compliance of the
Program per the requirements of this document.
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ANSI/ESD S20.20-2021
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6.2 ESD Control Program Manager or Coordinator
The Organization shall assign an ESD control program manager or coordinator to verify the
compliance of the Program per the requirements of this document.
6.3 Tailoring
This document, or portions thereof, may not apply to all ESD control programs. Any deviation from,
or exclusion of, a requirement of this document is considered tailoring. Tailored requirements shall
be summarized in the ESD control program plan and include the justification and technical rationale
for the deviation or exclusion of the requirement from the plan. See Annex C for more information.
7.0 ESD CONTROL PROGRAM ADMINISTRATIVE REQUIREMENTS
7.1 ESD Control Program Plan
The Organization shall prepare an ESD control program plan that addresses each of the
requirements of the Program. Those requirements include:
• Training
• Product qualification
• Compliance verification
• Grounding/equipotential bonding systems
• Personnel grounding
• ESD protected area (EPA) requirements
• Packaging
• Marking
The ESD control program plan is the principal document for implementing and verifying the
Program. The goal is a fully implemented and integrated Program that conforms to internal quality
system requirements. The ESD control program plan shall identify the areas within the Organization
that are a part of the overall ESD control program.
7.2 Training Plan
A training plan shall be established to ensure all personnel who handle or otherwise come in contact
with any ESDS items are provided with initial and recurrent ESD awareness and prevention
training. Initial training shall be provided before personnel handle ESDS items. The type and
frequency of ESD training for personnel shall be defined in the training plan. The training plan shall
include maintaining personnel training records and shall document where the records are stored.
Training methods and the use of specific techniques are at the Organization's discretion. The
training plan shall include the methods used by the Organization to verify trainee comprehension
and training adequacy.
7.3 Product Qualification Plan
A product qualification plan shall be established to ensure the ESD control items selected by the
Organization meet the requirements identified in Tables 2, 3, and 4 of this standard. This includes
the use of the test methods and test limits identified in these tables.
Product qualification shall occur during the initial selection of the ESD control item and before initial
use. It may use any of the following qualification methods:
(1) product specification review,
(2) independent laboratory evaluation, or
(3) internal laboratory evaluation.
Independent of the organization's qualification method, qualification records shall include the test
method used, the test results obtained from that method, and the test limits. Also, the qualification
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data shall include the environmental conditioning used during the testing as defined within the test
method. The product qualification plan shall also include the location of the qualification records.
Organizations with facilities where the annual minimum relative humidity (RH) is above the
environmental conditioning levels identified within the product qualification test method for each
ESD control item can use this minimum value to qualify each item used within that facility. However,
any ESD control items that leave these facilities (for example, packaging) shall be qualified using
environmental test requirements within the product qualification test methods identified in Tables
2, 3, and 4 of this standard.
Organizations that can verify the use of ESD control items before adopting this standard to certify
their ESD control program can use compliance verification records to meet product qualification
requirements. These records shall cover a minimum of one year and reflect a timeframe
immediately before using as product qualification records. These records shall reflect test results
that meet the compliance verification test limits identified in Tables 2, 3, and 4 of this standard.
The use of compliance verification records for product qualification does not apply when the
organization selects a footwear/flooring system as the personnel grounding method. When a
flooring/footwear system is selected, it shall be qualified using the environmental test conditioning
specified in the test methods identified in Table 2 or by the lowest RH at the facility as described
above. Product qualification shall be completed for each footwear and flooring type combination
used by the Organization.
7.4 Compliance Verification Plan
A compliance verification plan shall be established to ensure the ESD control items used by the
organization meet the requirements identified in Tables 2, 3, and 4 of this standard. This includes
the use of the test methods and test limits identified in these tables. The compliance verification
plan shall identify the ESD control items to be tested periodically and the frequency with which the
items are tested.
The compliance verification plan shall document the test methods and equipment used for making
the measurements. If the test methods or test limits used by the Organization differ from any of the
test methods referenced in Tables 2, 3, or 4 of this standard, a tailoring statement shall be
developed and documented as part of the ESD control program plan. This shall include the
technical rationale for the deviation from the test method or test limit requirement.
Compliance verification records shall be established and maintained to provide evidence of
conformity to the technical requirements. The location of the compliance verification records shall
be defined.
The test equipment selected shall be capable of making the measurements defined in the
compliance verification plan.
NOTE: Calibration certificates do not ensure test equipment is capable of making the required compliance
verification measurements.
8.0 ESD CONTROL PROGRAM PLAN TECHNICAL REQUIREMENTS
The following sections provide information regarding the technical requirements used in the
development of an ESD control program. For ESD control items selected for use or come into direct
contact with ESDS items, the required limits and test methods for those items become mandatory.
The required limits are based on the test methods or standards listed in each table. The compliance
verification plan shall document the methods used to verify the limits.
8.1 Grounding/Equipotential Bonding Systems
Grounding/equipotential bonding systems shall be used to ensure that ESDS items, personnel, and
any other conductors that come into contact with ESDS items (for example, mobile equipment) are
at the same electrical potential. An implementing process shall be selected from Table 1.