FORM U-5018-A MAR 96
MF
REVISION
DESCRIPTION
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A
INC. NOR A/001.
REDRAWN WITH CHANGE
PAGES RENUMBERED AS NECESSARY
DATE
APPROVED
98-11-19
C.MILLER
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EE
NEXT ASSY
APPLICATION
CONTRACT NO.
LOCKHEED MARTIN CORPORATION
GENERAL USAGE
DRAWN BY
DATE
G. LOVASZ
96-11-22
CHECKER
WTS
CHARLES E. MILLER
CMPNT
N.O.
MATL
P.S.
GROUP ENGR
GABRIEL LOVASZ
PROJECT
ALBERT EMERY
PROGRAM APPROVAL
CUSTOMER
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STRESS
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QUAL
A.T.D.
THRM
--SYS
COMPANY STANDARD
USED ON
MFG
5600 SAND LAKE ROAD, ORLANDO, FLORIDA 32819-8907
P.E.B.
PROD
OPS
D.E.H.
RELBL
--PROD
SPRT
--OCALA
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A.F.
SAFETY
ENVIRON
M.M.
L.D.
ELECTROSTATIC DISCHARGE CONTROL PROGRAM FOR
PROTECTION OF ELECTRICAL AND ELECTRONIC PARTS,
ASSEMBLIES, AND EQUIPMENT (EXCLUDING ELECTRICALLY
INITIATED EXPLOSIVE DEVICES)
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1. SCOPE
1.1 Scope. This standard covers the requirements for an Electrostatic Discharge
(ESD) control program for electrical and electronic parts, assemblies, and equipment
containing these parts, excluding electrically initiated explosive devices. The term
“parts” as used herein applies to electrical and electronic parts. The term “assemblies”
as used herein applies to subassemblies and all higher assemblies up to, but not
including, the equipment level. Parts, assemblies, and equipment are collectively
referred to as “items”.
This standard is modeled from MIL-STD-1686 and EIA-625 and covers ESD sensitive
(ESDS) items, protected work areas, handling procedures, training, marking of
documentation and hardware, intra-plant protective covering, packaging for delivery,
quality assurance provisions, audits, and reviews.
1.2 Purpose. The purpose of this standard is to minimize the impact of ESD on
equipment reliability and life cycle cost. This standard is tailored to control ESDS items
from receipt through packaging for delivery.
1.3 Application. This standard applies to the contractor, Lockheed Martin Electronics
& Missiles. Subcontractors and suppliers shall comply with the flowdown requirements
specified in 3.1.
1.3.1 Non-applicability of this standard . This standard does not include part level
design requirements.
1.4 Standard ESD Classification . Unless assigned a special classification as
described in 1.4.1, 1.4.2, or 1.4.3, all ESDS items will be handled in a standard way
regardless of their ESD sensitivity, i.e., all will be treated as if they were susceptible to
damage from ESD voltage levels of 1999 volts or less human body model (HBM).
Refer to Class 1 HBM sensitivity as detailed in MIL-STD-1686.
1.4.1 Extra-Sensitive ESD Classification . A part or assembly may be designated as
extra-sensitive if it is identified as being susceptible to damage from ESD voltages of
300 volts or less human body model. Special procedures shall be instituted to provide
appropriate protective measures.
1.4.2 Machine Model Sensitivity ESD Classification . If, based upon the type of work
performed, it is determined that the prime source of ESD damage is from a charged
machine or device rather than the human body, a machine model (MM) ESD sensitivity
classification for a part should be determined by, and at the discretion of, the
contractor. Special procedures shall be instituted to provide appropriate protective
measures.
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1.4.3 Charged Device Model Sensitivity ESD Classification . If, based upon the type of
work performed, it is determined that the prime source of ESD damage is from the rapid
discharge of a charged part rather than the human body, a charged device model
(CDM) ESD sensitivity classification for a part should be determined by, and at the
discretion of, the contractor. Special procedures shall be instituted to provide
appropriate protective measures.
1.5 ESDS elements . Elements of the ESDS program shall be in accordance with
Table I.
TABLE I
ESD CONTROL PROGRAM REQUIREMENTS ELEMENTS
FUNCTIONS
Production
Inspection
DESCRIPTION
√
√
√
√
√
√
√
√
ESD Control Program Plan (See 3.1)
Protected Areas (See 3.4)
Handling Procedures (See 3.5)
Protective Covering (See 3.6 )
Training (See 3.8)
Documentation (See 3.9)
Marking of Hardware (See 3.10)
QA Provisions Audits & Reviews (See 3.11 & 3.13)
Failure Analysis (See 3.12)
Packaging (See 5.1)
√
and Test
√
√
√
√
√
√
√
√
√
√
Storage and
Shipment
√
√
√
√
√
√
√
√
√
2. APPLICABLE DOCUMENTS
2.1 Government and industry standard documents . The following documents provide
reference and guidance for this standard to the extent specified herein.
SPECIFICATIONS:
Military
MIL-E-17555
Electronic and Electrical Equipment, Accessories,
and Provisioned Items (Repair Parts) : Packaging of
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STANDARDS:
Military
MIL-STD-129
Marking for Shipment and Storage
MIL-STD-785
Reliability Program for Systems and Equipment
Development and Production
MIL-STD-1285
Marking of Electrical and Electronic Parts
MIL-STD-1686
Electrostatic Discharge Control Program for
Protection of Electrical and Electronic Parts,
Assemblies and Equipment (Excluding Electrically
Initiated Explo sive Devices). (Metric).
HANDBOOK:
Military
MIL-HDBK-263
Electrostatic Discharge Control Handbook for
Protection of Electrical and Electronic Parts,
Assemblies, and Equipment (Excluding Electrically
Initiated Explo sive Devices). (Metric)
(Copies of specifications, standards, handbooks, drawings, and publications required
by contractors in connection with specific acquisitions should be obtained from the
acquiring activity or as directed by the contracting officer.)
Electronic Industries Association (EIA)
RS-471
Symbol and Label for Electrostatic Sensitive Devices
EIA-625
Requirements for Handling Electrostatic-Discharge-Sensitive
(ESDS) Devices
(Application for copies of EIA documents should be addresses to the Electronic
Industries Association, 2500 Wilson Boulevard, Arlington, VA 22201-3834.)
(Technical society and technical associations specifications and standards are
generally available for reference from libraries. They are also distributed among
technical groups and using Federal agencies.)
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2.2 Lockheed Martin documents . The following operating document provides direction
for the implementation of this company standard.
Lockheed Martin Electronics & Missiles Manufacturing Process
MP-86S48
Control of Electrostatic D ischarge
2.3 Order of precedence . In the event of a conflict between the text of this standard
and the reference(s) cited herein, the text of this standard shall take precedence.
3.
REQUIREMENTS
3.1 General requirements . Lockheed Martin Electronics & Missiles shall coordinate
efforts with other Lockheed Martin facilities and with subcontractors and suppliers
furnishing components, assemblies, and equipment to the Orlando and Ocala plants to
assist them in achieving compliance to this company standard.
3.1.1 Operating Documents. The procedures and guidelines for implementing the
company ESD control program are contained in a standard manufacturing process
(MP-86S48) which is used at Ocala, Orlando, depots, and other sites.
3.1.2 Components. DCMC approved component manufacturers on the applicable
Qualified Products List (QPL) shall be exempt from the Lockheed Martin flowdown
requirements of this document. When conflict exists between MIL-STD-1686 and the
component detailed specification as to whether or not a component is ESD sensitive,
the applicable component detailed specification shall take precedence.
3.2 Detailed requirements . ESDS items shall not be used in hardware designs when a
suitable alternative exists. When usage is required, the following requirements shall
apply.
3.2.1 Handling of ESDS items . ESDS items shall only be handled or processed at an
approved ESDS Protective Work Station. Once an ESDS item is installed in an
assembly, that assembly shall only be handled or processed at an ESDS Protective
Work Station, up to the assembly level, wherein the parts are protected by virtue of the
connected circuitry or their enclosure.
3.2.2 Operating voltages . ESD precautions are not required when operating voltages
are applied.
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3.3 Unit level control . Items of this nature (for example, complete spacecraft, radar
systems, etc.) that are too large or impractical to be placed in static safe containers
shall be covered by contractor procedure, defining static protective measures.
Minimum protective measures that shall be considered when preparing procedures are:
a.
b.
c.
d.
e.
f.
g.
h.
Shunts on exposed connectors
Shielded bags/covering with “metal-out” shielding layer construction
Static safe connector caps/covers
Grounded personnel
Grounded unit
Ionization
Grounded test stations
Grounded test consoles
3.4 Protected areas .
minimum:
All areas where ESDS items are handled shall have as a
a.
An approved ESDS Protective Work Station. The work station surface shall
have a safe ground.
b.
Periodic checking of the work station shall assure degradation has not
occurred.
c.
Static safe totes, trays, or protective bags to store and move ESDS items.
3.5 Handling procedures . Detailed procedures for handling ESDS items shall be
developed, documented, and implemented for all protected areas.
3.6 Protective covering . When being transported outside protected areas within a
contractor’s facility, ESDS items shall be enclosed in ESD protective packaging;
shunting devices may also be used for protection from triboelectric charging , direct
contact with charged objects, and electrostatic fields. Protective covering for delivering
of ESDS item under the contract shall be in accordance with 5.1.
3.7 Installation site . For equipment level installation and storage functions only, the
following minimum installation procedures shall be applicable:
a.
Where storage is required of ESD sensitive equipment prior to installation,
the protective covering provided shall be maintained intact.
b.
ESD protectiv e covering or caps on external equipment cabinet terminals,
interconnecting cables, and connector assemblies shall not be removed
until just prior to installation.
c.
Just prior to engaging a cable connector with a mating receptacle and prior
to removing protective covering, connector and receptacle surfaces shall be
momentarily contacted to discharge any electrostatic potentials on the
cable or on the installer’s body.
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3.8 Training. A two-tiered approach will be used to assure that company personnel
are trained regarding ESD. The training shall be classified as either Level 1 or Level 2.
3.8.1 Level 1 Awareness Training . This is a basic level of training which is designed to
familiarize an individual with the general subject of electrostatic discharge and the ESD
control program established for the company. When completed, this level of training is
considered to be a permanent certification.
Level 1 trained personnel may handle only packaged/protected ESDS devises and
shall not handle, examine, or work on unpackaged/unprotected ESDS devices either at
an ESD protective workstation or anywhere else. This is the minimum level of training
allowed for a person to enter an ESDS designated area without an escort or to function
as an escort for any person(s) visiting such a designated area.
3.8.2 Level 2 Certification Training . This level of training goes beyond the basic
awareness training of Level 1. It is designed for all personnel who work at an ESD
protective workstation and/or who handle unpackaged/unprotected ESDS devices.
An annual recertification is required to keep this level of training in effect.
3.8.3 Records of Training . Records of personnel training shall be made available to
the acquiring activity or its designated representative upon request.
3.9 Documentation .
3.9.1 Deliverables. Engineering drawings and specifications shall identify those
assemblies containing ESDS items. Identification of components which are contained
in these assemblies is not required unless specified in the applicable contract. Field
installations shall handle all assemblies identified as containing ESDS items in
controlled work areas.
3.9.2 Non-deliverables . Non-deliverable documentation used by the contractor for the
handling of ESDS items shall include or refer to documented protective handling
procedures as necessary.
3.10 Marking of hardware .
3.10.1 Assemblies. Unless otherwise specified or approved by the acquiring activity,
ESDS assemblies shall be marked with the MIL-STD-1285 sensitive electronic device
symbol (obsolete but still usable), the EIA RS-471 symbol, or any of those shown in
MIL-STD-129. The symbol shall be located in a position readily visible to personnel
when that assembly is incorporated in its next higher assembly level. When physical
size or orientation of the assembly precludes compliance with this requirement,
alternative marking procedures shall be developed and implemented upon concurrence
by the acquiring activity.
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3.10.2 Equipment enclosures . Unless otherwise specified or approved by the
acquiring activity, the MIL-STD-1285 sensitive electronic device symbol (obsolete but
still usable), the EIA RS-471 symbol, or any of those shown in MIL-STD-129, and an
ESD caution, as shown below, shall be readily visible to personnel prior to gaining
access to ESDS parts or assemblies.
CAUTION
Contains parts and assemblies susceptible
to damage by electrostatic discharge (ESD).
3.10.3 External equipment terminals . The MIL-STD-1285 sensitive electronic device
symbol (obsolete but still usable), the EIA RS-471 symbol, or any of those shown in
MIL-STD-129 shall be applied on the exterior of the equipment cabinet or housing and
adjacent to external terminals connected internally to ESDS parts and assemblies.
3.11 Quality assurance provisions . A quality assurance program shall be established
to assure conformance to the requirements specified herein. Prior to use, each
protected area shall be certified to verify compliance to the requirements of 3.4, and
shall be periodically monitored to assure its integrity. This program shall include
monitoring and auditing of ESD requirements invoked on subcontractors and suppliers.
3.12 Failure analysis . When MIL-STD-785, Task 104 or Task 301, is invoked by the
data ordering document included in the contract or order, the failure analysis shall
include as a factor, ESD related failure modes and effects analysis, and
recommendations for corrective action.
3.13 Audits and reviews . The acquiring activity reserves the right to perform audits
and review documentation specified herein, as required, to determine conformance to
the requirements specified in this standard.
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4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection . Unless otherwise specified in the purchase order,
the supplier shall be responsible for the performance of all inspection and test
requirements as specified herein. Except as otherwise directed by the procuring
activity, the supplier may utilize his own facilities or any commercial laboratory
acceptable to the procuring activity. The procuring activity reserves the right to perform
any of the inspections set forth in this specification where such inspections are deemed
necessary to assure that supplies and services conform to the prescribed requirements.
4.2 Test methods.
4.2.1 Visual inspection . Unless otherwise specified herein, conformance to this
specification shall be determined visually. Visual examination shall be conducted with
the unaided eye, except for normal vision correction.
5. PREPARATION FOR DELIVERY
5.1 Packaging. ESD protective packaging requirements for ESDS Parts/Assem blies
shall conform to the following:
a.
Protection shal l be provided to prevent physical damage and to maintain
leads and terminals in the manufactured condition under handling and
transportation environments. Materials used for this protection shall be
non-corrosive and provide protection against triboelectric generation of
static electricity. Conductive shunting foam, bars, or clips shall be applied
on electrical connectors to short all connector pins and the connector shell
together (units may also be placed in approved shielded bags in lieu of this
requirement). In addition, ESD protective caps shall be used on equipment
external connectors that are connected to ESDS parts and assemblies
within the equipment.
b.
Unit packs shall then be enclosed in an ESD protective material to provide
protection from electrostatic voltage sources in the form of fields or direct
discharge, if the packaging of 5.1(a) does not provide this protection.
c.
Outer surface of the package shall be marked with the following caution
statement or as otherwise approved by the acquiring activity:
CAUTION NOTE
OBSERVE PRECAUTIONS FOR HANDLING
ELECTROSTATIC DISCHARGE SENSITIVE ITEMS
5.1.1 Packaging for delivery . Unless otherwise specified on the procurement
document, ESD protective packaging shall be in accordance with MIL-E-17555 for
ESDS items.
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6. NOTES
6.1 Intended use. This document is intended to establish handling and processing
procedures for ESDS devices and assemblies containing ESDS devices to assure
protection from damage.
6.2 Definitions. The definitions of terms not defined herein shall comply with MILHDBK-263.
6.2.1 ESD protective material . Material capable of one or more of the following :
limiting the generation of static electricity; rapidly dissipating electrostatic charges over
its surface or volume; or, providing shielding from ESD spark discharge or electrostatic
fields. ESD protective materials are classified in accordance with their surface
resistivity (or alternate conductivity) as conductive, static dissipative, or antistatic.
6.2.2 ESD protective packaging . Packaging with static safe materials to prevent ESD
damage to static sensitive devices.
6.2.3 Protective packaging . Bags, wraps, barriers, containers, shorting bars, etc .,
fabricated from static safe materials.
6.2.4 Static safe materials . Materials that are either:
Conductive - having a surface resistivity of 1 X 10 5 ohms per square maximum;
or
Static Dissipative - having a surface resistivity greater than 1 X 10 5 but not greater than
1 X 10 9 ohms per square;
or
Antistatic - having a surface resistivity greater than 10 9 but not greater than 1 X 10 14
ohms per square.
6.2.5 ESDS protective workstation . A work station which is equipped with the
necessary ESD protective materials and equipment to limit ESD voltages and/or energy
levels to those which will not alter the electrical characteristics of ESDS items being
handled.
6.2.6 Unit package. A unit package can be an individual static shielding (SS)
container, an individual SS bag, a bundle of tubes for the same issue, or multiple SS
bags in a larger SS bag or container.
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