Discharge (ESD) Checklist
manufacturing partners have an ESD staff committee in each
manufacturing plant. This group is responsible for the personnel
in the plant and to oversee the ESD control programs in
their plant. Each plant has a measurement level and indicator
which pertains to the level of success of their ESD control
program. The ESD program system has controls in place for
continuously reviewing and improving the plant's ESD control
program. There are regular ESD control audits conducted
in each plant. This checklist is used during ESD audits.
The ESD audit checklist below includes actual measurements
and field voltages measurements from monitoring equipment.
plant has a resistivity meter and a field meter for actual
measurement and voltage build-ups during audits. There is
a system for tracking and closing open action items generated
by the internal ESD audits.
addition, ESD Control requirements are imposed on visitors.
A system for monitoring employee violations of ESD controls
is in place and the there is a system for correcting system
issues that lead to ESD control violations. MIL-HDBK-263K
has a suggested checklist to use in performing an ESD audit.
Our Xmultiple ESD Audit Checklist uses these suggested items
in our audit checklist below.
Maintain logs, records and procedures showing the frequency
for cleaning all ESD protective flooring/surfaces to maintain
their conductive/dissipative properties. Maintain log for
all ESD procedures and assure there is one common ESD ground
for the entire plant.
Employees wear and test personal grounding devices. Non-essential
personnel and items are restricted from all ESD controlled
Check for ESD insulators and remove them from the work area.
Check that ESD sensitive equipment is in proper anti-static
packaging with labels.
Ensure that approved cleaners are on hand.
Check that wiring of discharge devices is grounded.
Ensure that ionizer is positioned and working properly.
Ensure that non-grounded personnel stay a least 4 feet away
from your static-safe area.
Ensure ESD protective flooring is used in ESD controlled
Ensure that ESD protective flooring is grounded to the plant's
common ESD ground. Measure the resistivity of the ESD protective
flooring; Spec: 0-1e5 Ohms/Square. Measure field voltages
at different areas of the floor; Spec: < 200V. Measure
the resistance between a flooring ground point and the common
ESD ground; Spec: < 1 Ohm
Ensure where conductive footwear is used, all personnel
check continuity to ground upon entering the area.
Ensure all ground points of all workstations are grounded
to the common ESD ground of the plant.
Measure the resistance between a workstation ESD ground
point and the common ESD ground; Spec: < 1 Ohm
Ensure that all manufacturing personnel wear grounded wrist
straps. Ensure personnel are checking their wrist straps
at regular intervals and the results of these checks are
logged consistently and kept. All Wrist Bands, footwear
and ground monitors are checked and maintained on a regular
Ensure employees dispose of foot grounders after one-time
Ensure personnel wear ESD protective garments or smocks.
Measure the resistivity of the ESD protective garment/smock;
Spec: 0-1e5 Ohms/Square
Ensure all ground points of equipment are grounded to the
common ESD ground. Measure the resistances between equipment
ESD ground points and the common ESD ground; Spec: <
Measure field voltages around the equipment; Spec: <
Ensure ESD test schedule is maintained.
Ensure all charge-generating equipment is at least 4 feet
away from any ESD sensitive areas.
Ensure anti-static mats are used on all work area equipment.
Use static mats on the work area tables with a proper grounding
to the ESD common ground. Measure the resistivity of the
worktable surface; Spec: 1e5-1e9 Ohms/Square. Measure the
resistance of the dissipative mat ground point to the common
ESD ground; Spec: < 1 Ohm. Measure
field voltages at different areas of the worktable surface;
Spec: < 200V
Ensure all ground points of workstations and equipment are
Keep anti-static materials in ESD controlled areas, including
plastic bags, plastic sleeves, plastic folders, boxes, bins,
organizers and any other material product used in these
areas. Use ionizers in ESD areas.
Maintain ionizers on a regular basis. Measure field voltages
around any triboelectric items in the workplace; Spec: <
Ensure that relative humidity is monitored and maintained
above 40% in ESD controlled areas.
Ensure all racks, shelving and cabinets are covered with
dissipative liners in areas contacting ESD sensitive items.
Ensure all personnel have grounded themselves before handling
ESD sensitive items.
Ensure all shelves carts, racks, cabinets or any equipment
of this type is grounded to the common ESD ground and if
they have wheels, the wheels are grounded. Measure the resistance
of the rack/cabinet ground point to the common ESD ground;
Spec: < 1 Ohm
Ensure that all bins, organizers, trays, boxes, etc. are
made for use to store ESD sensitive materials. Measure field
voltages around the storage racks and cabinets; Spec: <
Ensure that all devices used for storage or moving items
are grounded to the other levels if they are multi-level.
Ensure all personnel ground themselves first before handling
ESD sensitive items from a cart/container or on the work
table and if connectors and components (boards/units) are
transported from one area to another are in dissipative
containers with dissipative lids and the personnel reground
themselves upon returning to a work area.
Ensure that all dissipative containers transported are discharged
through a dissipative mat on the work table before they
Control Training and Compliance
manufacturing employees in our plants are trained on ESD
awareness and control. There is a record of all employees'
ESD training history maintained. The 3M Corporations handbook
and a standard training manual for use for training new
employees on ESD control is used in this process. There
is a central repository of ESD training materials and references
maintained in each plant. The table below describes the
test intervals recommended by the Electronics Industry Association,
in accordance with Standard ANSI/EIA-625.
straps, foot straps, footwear, smocks
floor mats, ESD ground connections
Static surveys of EPA and work stations
RTG of flooring, ESD ground continuity
balance and charge decay
system compliance to the ESD document
8. ESD Audit Checklists
audits are an essential part of maintaining our ESD control
program. This audit checklist provides the ESD control practices
and it points to potential problem areas regarding equipment
and personnel in our manufacturing factories. This audit
checklist provides information for personnel duties and
S20.20 provides a collective resource for ESD recommended
constraints on product performance. ESD audits in our manufacturin
factories are designed around your specific ESD components
and in compliance with ANSI/ESD S20.20.
ESD Standard Document
ESD Control and Procedures