Together, EIA and JESDA detail the ESD requirements from the earliest steps in the assembly process to the final packing, shipping, and handling of. JEDEC. STANDARD. Requirements for Handling Electrostatic-Discharge- Sensitive (ESDS) Devices JESDA (Revision of EIA). DECEMBER charging up to dangerous levels (> 1kV) (JEDEC specification JESDA). Verify that machines and microscopes are properly grounded per JESDA.
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Adding a Data Visualiz No claims to be in conformance with this standard may be made unless all requirements stated in the standard are met. By downloading this file the individual agrees not to charge or resell the resulting material.
This document is copyrighted by the Electronic Industries Alliance and may not be reproduced without permission. Organizations may obtain permission to reproduce a limited number of copies through entering into a license agreement. The requirements within this standard were derived from existing industry standards, specifications, test methods, and input jesc625 various industry reviews.
The intent of this document is for users to incorporate these minimal requirements into their ESD control program to provide a consistent ESD protection level for their products.
JESDA ESD Handling Dec, _图文_百度文库
The passage of a static charge through an electrostatic-discharge-sensitive ESDS device can result in catastrophic failure or performance degradation of the part. NOTE — The requirements of uesd625 standard are not imposed prior to probe. Prior to probe, the manufacturer should take appropriate ESD precautions jesd65 minimize damage to devices. A source of charged jewd625 molecules ions. Referring to the property of material that inhibits triboelectric charging. NOTE — A material’s antistatic property is not necessarily correlatable with its resistivity or resistance.
A material that has a surface resistivity less than 1x ohms per square or a volume resistivity less than 1x ohm centimeter. NOTE — A conductive material is not necessarily antistatic. The transfer of electrostatic charge between bodies jesd25 surfaces that are at different electrostatic potentials.
The lowest level of ESD that produces changes in device characteristics such that the device fails to meet its specified characteristics. Lines of force surrounding an electrically charged object. A barrier or enclosure that limits the penetration of an electrostatic field so that its effects do not reach the jes6d25 or contained devices and produce damage.
The entire low-impedance path from a piece of electrical equipment to a hardground electrode e. The point, electrodes, bus bar, metal strips, or other system of conductors that form a path from a statically charged person or object to ground.
A work position with materials and equipment that limit electrostatic potential. A packaging system that provides electrostatic protection and limits triboelectric charging to levels that do not result in device damage.
A table top or other surface on which to work that has a resistance to ground of less than ohms ground: A designated connection, location, or assembly used on an ESD protective material or device that is intended to accommodate electrical connection from the device to ESD ground. A material having a surface resistivity of at least 1 x ohms per square or volume resistivity of at least 1 x ohm centimeter. A short form of electrostatic. A material having a surface resistance between 1 x ohms and 1 x ohms or a volume resistivity between 1 x ohm centimeters and 1 x ohm centimeters.
Electrical charge at rest. NOTE — The electrical charge is due to the transfer of electrons within a body polarization or from one body to another. The dc voltage divided by the current passing between two electrodes of specified configuration that contact the same side of a insulative material or item. NOTE — Surface resistance is expressed in ohms. The generation of electrostatic charges when two pieces of material in intimate contact are separated where one or both is an insulator.
NOTE — Substantial generation of static electricity can be caused by contact and separation of two materials or by rubbing two substances together. NOTE 1 Volume resistivity is generally expressed in ohm centimeters. The required and recommended ESD item checks are listed in table 2.
ESD Protective Worksurface 2. Grounded flooring or floor mats are only required when personnel or mobile ESD protective workstations utilize floor grounding methods.
REQUIREMENTS FOR HANDLING ELECTROSTATIC-DISCHARGE-SENSITIVE (ESDS) DEVICES | JEDEC
When ESD protective smocks are worn, they shall cover all personal garments above the waist except at the neck area. Static Generating Sources and Charged Surfaces 5.
ESD Protective Smocks 6. Where both grounds are used, they shall be connected bonded together. Its value shall be within the jes6d25 specified in table 2, 1. When R2 or R3 are used, the resistor values shall be as recommended by the ESD protective equipment manufacturer. Recommended Weekly a ESD protected workstation.
Recommended Quarterly ESD protected area and workstation static jess625 surveys. Those with mid-to-lower resistance values provide shorter charge dissipation times. All ESDS devices shall be removed from the worksurface while making these measurements. Air velocity measurements are not required.
However a lower value may be used if local safety requirements can still be met. Otherwise, the attribute fail must be recorded. Corrective actions resulting from monitor alarms shall be documented.
The caution label shall be legible to normal vision at a distance of three feet. Monochromatic reproduction in any color that contrasts with the background may be used. Where the choice of color is arbitrary, it is suggested that the symbol be black on a yellow background. jesd65
REQUIREMENTS FOR HANDLING ELECTROSTATIC-DISCHARGE-SENSITIVE (ESDS) DEVICES
Wherever possible, the color red for the symbol should be avoided as red suggests a personnel hazard Reference EIA An example of an ESD protected package caution label is shown in figure 2. The ESD caution label on the package may be provided by a preprinted marking on the package or its sealing tape. Equipment ground is the electrical ground green wire at receptacles that have been tested to and meet the requirements of NFPA or local equivalent.
A typical grounding system for an ESD protected workstation is illustrated in figure 1. When both equipment and earth grounds are used at the same ESD protective workstation they shall be bonded together at some point in the ground system. When more than one ESD worksurface is used at a workstation, each surface shall be individually connected to the ESD ground.
A resistor in the grounding wire is optional. Wire splices should be crimped or soldered. Use of alligator clips is not recommended. The wire should be attached to physical structures to prevent mechanical damage. When a floor grounding device e. Applying or removing static generating tapes and labels to antistatic tubes, magazines and carriers shall not be done with ESDS devices inside.
NOTE — Topically treated tubes, trays, magazines and carriers tend to lose their static protective properties with use and should be evaluated periodically for iesd625 performance.
NOTE — ESD controlled packing materials that will be inside wafer and die containers should be selected to avoid contamination of the devices.
When the supplier’s original packing materials and containers are noncompliant to this standard, the ESDS devices shall be rejected and returned in the original materials and containers. As a minimum, audit records shall specify what was audited, the auditor’s name, date of audit, audit results, corrective actions required if applicableand evidence of verification of satisfactory completion of any required corrective actions. As a minimum, the records shall show dates of training, length of training session, topics covered, and the name of the trainer.
Records shall be maintained for at least two 2 complete years. During application of any antistatic chemical, mesd625 user must consider the following: The ionizer shall be aimed at the devices and operator’s hands rather than at the operator.