ANSI ESD-S20.20-2021-EN.pdf - 第17页

ANSI/ESD S20. 20- 2021 9 Technical Requirement ESD Control Item Product Qualification Compliance Verificatio n Test Method Required Limit(s) (8) Test Method Required Limit(s) EPA Ionization ANSI/ESD STM3.1 Discharge Time…

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ANSI/ESD S20.20-2021
8
Table 3. EPA ESD Control Items
Technical
Requirement
ESD Control
Item
Product Qualification
Compliance Verification
Test Method
Required
Limit(s)
(8)
Test Method
Required
Limit(s)
EPA
Worksurface
(9)
ANSI/ESD
STM4.1
Point to Point
< 1.0 x 10
9
ohms
ESD TR53
Worksurface
Section
Point to Ground
< 1.0 x 10
9
ohms
Point to
Groundable Point
< 1.0 x 10
9
ohms
Wrist Strap
ANSI/ESD S1.1
0.8 x 10
6
to
1.2 x 10
6
ohms
For compliance verification of a
Wrist Strap System, see Table 2.
Wristband
ANSI/ESD S1.1
Interior
< 1.0 x 10
5
ohms
Exterior
> 1.0 x 10
7
ohms
Personnel
Ground Wrist
Strap
Connection
(non-
monitored)
ANSI/ESD S6.1
Point to
Ground
(10)
< 2 ohms
ESD TR53
Grounding/
Equipotential
Bonding
Systems
Section
Point to
Ground
(10)
< 2 ohms
Continuous
Monitors
User-defined
User-defined
ESD TR53
Continuous
Monitors
Section
Manufacturer
defined
Footwear
ANSI/ESD
STM9.1
Point to
Groundable Point
< 1.0 x 10
9
ohms
For compliance verification of the
Footwear/Flooring System, see
Table 2.
Foot
Grounders
ANSI/ESD
SP9.2
Point to
Groundable Point
< 1.0 x 10
9
ohms
Flooring
ANSI/ESD
STM7.1
Point to Point
< 1.0 x 10
9
ohms
Point to
Groundable Point
< 1.0 x 10
9
ohms
Seating
ANSI/ESD
STM12.1
Point to
Groundable Point
< 1.0 x 10
9
ohms
ESD TR53
Seating
Section
Point to Ground
< 1.0 x 10
9
ohms
Table 3 continued next page.
8
For standards that have multiple resistance test methods, these limits apply to all methods.
9
Due to a wide variety of applications for worksurfaces, specific requirements that could be broadly applied
are difficult to determine. If there is a concern for CDM failures, then a lower limit of 1.0 x 10
6
ohms for point
to point and point to groundable point should be considered.
10
If there is a resistor in line, then the limit must be adjusted to less than 5.0 x 10
6
ohms.
ANSI/ESD S20.20-2021
9
Technical
Requirement
ESD Control
Item
Product Qualification
Compliance Verification
Test Method
Required
Limit(s)
(8)
Test Method
Required
Limit(s)
EPA
Ionization
ANSI/ESD
STM3.1
Discharge Time
User-defined
ESD TR53
(11)
Ionization
Section
Discharge Time
User-defined
Offset Voltage
(Peak)
-35 volts <
Voffset
< 35 volts
Offset Voltage
(Peak)
-35 volts< Voffset
< 35 volts
Shelving
(9)
(When used
to store
unprotected
ESDS items)
ANSI/ESD
STM4.1
Point to Point
< 1.0 x 10
9
ohms
ESD TR53
Worksurface
Section
Point to Ground
< 1.0 x 10
9
ohms
Point to
Groundable Point
< 1.0 x 10
9
ohms
Mobile
Equipment
(9)
(Working
Surfaces)
ANSI/ESD
STM4.1
Point to Point
< 1.0 x 10
9
ohms
ESD TR53
Worksurface
Section
Point to Ground
< 1.0 x 10
9
ohms
Point to
Groundable Point
< 1.0 x 10
9
ohms
Electrical
Soldering/
Desoldering
Hand Tools
ANSI/ESD
S13.1
Tip to Ground or
Groundable Point
< 2.0 ohms
ESD TR53
Electrical
Soldering/
Desoldering
Hand Tools
Section
Tip to Ground or
Groundable Point
< 10 ohms
Tip Voltage
< 20 millivolts
Tip Leakage
< 10 milliamps
Static Control
Garment
ANSI/ESD
STM2.1
Point to Point
< 1.0 x 10
11
ohms
ESD TR53
Static Control
Garment
Section
Point to Point
< 1.0 x 10
11
ohms
Groundable
Static Control
Garment
ANSI/ESD
STM2.1
Point to Point and
Point to
Groundable Point
< 1.0 x 10
9
ohms
ESD TR53
Groundable
Static Control
Garment
Section
Point
to Groundable
Point
< 1.0 x 10
9
ohms
11
For additional information on periodic testing of Ionizers, see ANSI/ESD SP3.3.
ANSI/ESD S20.20-2021
10
8.4 Packaging
A packaging plan shall be established to define packaging requirements, both inside and outside
the EPA, per ANSI/ESD S541 or the contract, purchase order, drawing, or other documentation
necessary to meet customer requirements. Test methods and test limits required for the various
types of ESD protective packaging used by the Organization per ANSI/ESD S541 are summarized
in Table 4.
Packaging considered 'single use' shall be subjected to the same product qualification and
compliance verification requirements outlined in Sections 7.3 and 7.4 and shall meet the
corresponding test method and test limit requirements of Table 4.
Table 4. Packaging Requirements
Technical
Requirement
ESD
Control
Item
Product Qualification
Compliance Verification
Test Method
Required
Limit(s)
(8)
Test
Method
Required
Limit(s)
Packaging
Conductive
Packaging
ANSI/ESD STM11.11
or
ANSI/ESD STM11.12
or
ANSI/ESD STM11.13
< 1.0 x 10
4
ohms
ESD TR53
Packaging
Section
< 1.0 x 10
4
ohms
Dissipative
Packaging
ANSI/ESD STM11.11
or
ANSI/ESD STM11.12
or
ANSI/ESD STM11.13
≥1.0 x 10
4
to
<1.0 x 10
11
ohms
ESD TR53
Packaging
Section
≥ 1.0 x 10
4
to
< 1.0 x 10
11
ohms
Discharge
Shielding
(Bags Only)
ANSI/ESD STM11.31
< 20 nJ
ESD TR53
Packaging
Section
≥1.0 x 10
4
to
<1.0 x 10
11
ohms
When ESDS items are placed on packaging materials, and the ESDS items have work being
performed on them, then the packaging materials become worksurfaces. The worksurface
requirements for resistance to ground shall apply.
8.4.1 United States Department of Defense (DoD) Packaging Requirements
Department of Defense (DoD) organizations or those performing work under DoD contracts shall
comply with MIL-STD-2073-1 for packaging requirements unless other contractual requirements
apply or are exempt from this requirement based upon application-specific requirements.
8.5 Marking
ESDS items, system, or packaging marking shall be per customer contracts, purchase orders,
drawings, or other documentation. When the contract, purchase order, drawing, or other
documentation does not define ESDS items, system, or packaging marking, the Organization
developing the ESD control program plan should consider the need for marking. If it is determined
that marking is required, it shall be documented as part of the ESD control program plan. If it is
determined that marking is not required, it does not have to be documented as part of the ESD
control program plan.
NOTE: See ANSI/ESD S8.1 for symbols that can be used.