ANSI ESD-S20.20-2021-EN.pdf - 第12页

ANSI/ESD S20.20- 2021 4 data shall include the envir onmental conditionin g used during the testing as def ined within the test method. The product qualific ation plan shall a lso include the loca tion of the qual ificat…

ANSI/ESD S20.20-2021

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

ANSI/ESD S20.20-2021

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.

ANSI/ESD S20.20-2021

There are no requirements for a compliance verification plan for testing the grounding system; only

initial verification is required. If ground fault circuit interrupters (GFCI) are installed at the user's

facility, this measurement is not required.

NOTE: Verification of the grounding system should be considered after electrical system maintenance or

service additions.

Table 1. Grounding/Equipotential Bonding Requirements

Technical

Requirement

Implementing Process

Test Method

Required Limit(s)

Grounding/Bonding

System

Equipment Grounding

Conductor

ANSI/ESD S6.1

< 1.0 ohm

impedance

(4)

Auxiliary Ground

ANSI/ESD S6.1

< 25 ohms to the

Equipment Grounding

Conductor

Equipotential Bonding

ANSI/ESD S6.1

< 1.0 x 10

ohms

(5)

8.2 Personnel Grounding

All personnel shall be bonded or electrically connected to the selected grounding/equipotential

bonding system when handling ESDS items. The personnel grounding method(s) shall be selected

from Table 2.

When personnel are seated at ESD protective workstations, they shall be connected to the selected

grounding/equipotential bonding system via a wrist strap system.

For standing operations, personnel shall be grounded via a wrist strap or by a footwear/flooring

system meeting the requirements of Table 2.

When garments are used to achieve personnel grounding, it shall be documented in the ESD

control program plan. It shall also meet the groundable static control garment system resistance

requirements defined in Table 2 and the groundable static control garment in Table 3.

If there is a GFCI, this measurement is not required and may cause the GFCI to activate.

The maximum resistance between any ESD control items and the common connection point.