Static Control Bags. For the Protection of Electrostatic Discharge Susceptible Items ANSI/ESD S

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1 For the Protection of Electrostatic Discharge Susceptible Items Static Control Bags Electrostatic Discharge Association 7900 Turin Road, Bldg. 3 Rome, NY An American National Standard Approved April 24, 2013

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3 ESD Association Standard for the Protection of Electrostatic Discharge Susceptible Items - Static Control Bags Approved September 2, 2012 ESD Association

4 CAUTION NOTICE Electrostatic Discharge Association (ESDA) standards and publications are designed to serve the public interest by eliminating misunderstandings between manufacturers and purchasers, facilitating the interchangeability and improvement of products and assisting the purchaser in selecting and obtaining the proper product for his particular needs. The existence of such standards and publications shall not in any respect preclude any member or non-member of the Association from manufacturing or selling products not conforming to such standards and publications. Nor shall the fact that a standard or a publication that is published by the Association preclude its voluntary use by non-members of the Association whether the document is to be used either domestically or internationally. Recommended standards and publications are adopted by the ESDA in accordance with the ANSI Patent policy. Interpretation of ESDA Standards: The interpretation of standards in-so-far as it may relate to a specific product or manufacturer is a proper matter for the individual company concerned and cannot be undertaken by any person acting for the ESDA. The ESDA Standards Chairman may make comments limited to an explanation or clarification of the technical language or provisions in a standard, but not related to its application to specific products and manufacturers. No other person is authorized to comment on behalf of the ESDA on any ESDA Standard. DISCLAIMER OF WARRANTIES THE CONTENTS OF ESDA S STANDARDS AND PUBLICATIONS ARE PROVIDED AS-IS, AND ESDA MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESSED OR IMPLIED, OF ANY KIND WITH RESPECT TO SUCH CONTENTS. ESDA DISCLAIMS ALL REPRESENTATIONS AND WARRANTIES, INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR USE, TITLE AND NON- INFRINGEMENT. DISCLAIMER OF GUARANTY ESDA STANDARDS AND PUBLICATIONS ARE CONSIDERED TECHNICALLY SOUND AT THE TIME THEY ARE APPROVED FOR PUBLICATION. THEY ARE NOT A SUBSTITUTE FOR A PRODUCT SELLER S OR USER S OWN JUDGEMENT WITH RESPECT TO ANY PARTICULAR PRODUCT DISCUSSED, AND ESDA DOES NOT UNDERTAKE TO GUARANTEE THE PERFORMANCE OF ANY INDIVIDUAL MANUFACTURERS PRODUCTS BY VIRTUE OF SUCH STANDARDS OR PUBLICATIONS. THUS, ESDA EXPRESSLY DISLAIMS ANY RESPONSIBILITY FOR DAMAGES ARISING FROM THE USE, APPLICATION, OR RELIANCE BY OTHERS ON THE INFORMATION CONTAINED IN THESE STANDARDS OR PUBLICATIONS. LIMITATION ON ESDA s LIABILITY NEITHER ESDA, NOR ITS MEMBERS, OFFICERS, EMPLOYEES, OR OTHER REPRESENTATIVES WILL BE LIABLE FOR DAMAGES ARISING OUT OF, OR IN CONNECTION WITH, THE USE OR MISUSE OF ESDA STANDARDS OR PUBLICATIONS, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. THIS IS A COMPREHENSIVE LIMITATION OF LIABILITY THAT APPLIES TO ALL DAMAGES OF ANY KIND, INCLUDING WITHOUT LIMITATION, LOSS OF DATA, INCOME OR PROFIT, LOSS OF OR DAMAGE TO PROPERTY AND CLAIMS OF THIRD PARTIES. Published by: Electrostatic Discharge Association 7900 Turin Road, Bldg. 3 Rome, NY Copyright 2013 by ESD Association All rights reserved No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Printed in the United States of America ISBN:

5 (This foreword is not part of ESD Association Standard ANSI/ESD S ) FOREWORD Presently, no industry standard for static control bags exists. While the United States Department of Defense (DoD) specification MIL-PRF addresses military static control films, it is intended for use in specialized military methods of preservation, including exposure to high salt concentration, transfer at sea, rough handling, and minimal storage conditions. This military specification is for rolls of film only, and does not address bags. Only the few materials that have been tested and placed on the DoD qualified products list are considered compliant to MIL-PRF This military specification states: There are no commercial equivalents that meet the physical, mechanical, and corrosion requirements Since MIL-PRF is clearly designated for military applications, and requires film performance specifications that are not necessary for most electronics industry applications, an industry standard is needed. This standard 1 is intended to establish performance limits for bags that protect electronics from static and moisture damage during common electronic industry manufacturing and packaging applications. This standard was approved on September 2, 2012 and was designated ANSI/ESD S At the time ANSI/ESD S was prepared, the 11.0 Packaging Subcommittee had the following members: Brent Beamer, Chair 3M Kevin Duncan, TAS Rep Seagate Technology Dale Parkin Seagate Technology Robert Vermillion RMV Technology Group, LLC Kurt Edwards Lubrizol Jeff Salisbury Flextronics Stanley Weitz Electro-Tech Systems, Inc. Gene Felder Desco Industries, Inc. Julius Turangan Ovation, Inc. Craig Zander Prostat Corporation The following individuals made a significant contribution to the development of ANSI/ESD S : Jose Sancho NASA/Honeywell/TSI David E. Swenson Affinity Static Control Consulting, LLC 1 ESD Association Standard (S): A precise statement of a set of requirements to be satisfied by a material, product, system or process that also specifies the procedures for determining whether each of the requirements is satisfied. i

6 TABLE OF CONTENTS 1.0 PURPOSE AND SCOPE PURPOSE SCOPE REFERENCED PUBLICATIONS DEFINITIONS PERSONNEL SAFETY STATIC CONTROL BAG LEVELS BAG MARKINGS TECHNICAL REQUIREMENTS TESTING INSTRUCTIONS MOISTURE VAPOR TRANSMISSION RATE (MVTR) PUNCTURE RESISTANCE SEAL STRENGTH THICKNESS MARKING ADHESION TRANSPARENCY SILICONE... 6 Annexes Annex A (Informative): Bibliography... 7 Figures Figure 1: ESD Protective Symbol... 4 Figure 2: Moisture Warning Symbol... 4 Figure 3: Seal Strength Test... 5 Tables Table 1: Technical Requirements... 4 ii

7 ESD Association Standard ANSI/ESD S ESD Association Standard for the Protection of Electrostatic Discharge Susceptible Items - Static Control Bags 1.0 PURPOSE AND SCOPE 1.1 Purpose This standard establishes performance limits for bags that are intended to protect electronic parts and products from damage due to static electricity and moisture during common electronic manufacturing industry transport and storage applications. 1.2 Scope This standard applies to bags used to package electronic devices and assemblies. It does not address bags for volatile materials, chemicals, explosives, or munitions. NOTE: Some bag applications may require the consideration of additional material or cleanliness controls, including particle level, nonvolatile residue, ionic substances, outgassing, or polycarbonate stress. These parameters are beyond the scope of this standard. 2.0 REFERENCED PUBLICATIONS Unless otherwise specified, the following documents of the latest issue, revision or amendment form a part of this standard to the extent specified herein: ANSI/ESD S8.1, Symbols ESD Awareness 2 ANSI/ESD STM11.11, Surface Resistance Measurement of Static Dissipative Planar Materials 2 ANSI/ESD STM11.31, Bags 2 ASTM D882, Tensile Properties of Thin Plastic Sheeting 3 ASTM F1249, Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor 3 ASTM F 392, Standard Test Method for Flex Durability of Flexible Barrier Materials 3 ASTM E168, General Techniques of Infrared Quantitative Analysis 3 EMA Test Procedure, Optical Density 4 IPC/JEDEC J-STD-033, Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices 5 IPC-TM-650, Test Methods Manual, Adhesion, Tape Testing 6 MIL-STD-3010, Testing Procedures for Packaging Materials DEFINITIONS The terms used in the body of this document are in accordance with the definitions found in ESD ADV1.0, ESD Association s Glossary of Terms available for complimentary download at 2 ESD Association, 7900 Turin Rd, Bldg. 3, Rome, NY , American Society for Testing and Materials (ASTM), 1916 Race Street, Philadelphia, PA , EMA European Metallizers Association P.O. Box CH The Hague The Netherlands 5 JEDEC Solid State Technology Association 2500 Wilson Boulevard Arlington, VA Phone (703) IPC 3000 Lakeside Drive, 309 S. Bannockburn, IL Phone Department of Defense Naval Air Warfare Center Aircraft Division, Highway 547, Code 41K000B120-3, Lakehurst, NJ

8 4.0 PERSONNEL SAFETY The procedures and equipment described in this document may expose personnel to hazardous electrical conditions. Users of this document are responsible for selecting equipment that complies with applicable laws, regulatory codes, and both external and internal policy. Users are cautioned that this document cannot replace or supersede any requirements for personnel safety. Ground fault circuit interrupters (GFCI) and other safety protection should be considered wherever personnel might come into contact with electrical sources. Electrical hazard reduction practices shall be exercised and proper grounding instructions for equipment should be followed. The resistance measurements obtained through the use of this test method shall not be used to determine the relative safety of personnel exposed to high AC or DC voltages. 5.0 STATIC CONTROL BAG LEVELS This standard defines five levels of static control bags: Level 1: Moisture Barrier Bag for Device Packaging This bag provides the following properties intended to protect ESD and moisture susceptible items: Moisture barrier properties intended to protect items that will be subjected to re-flow soldering, preventing excess moisture absorption that can lead to device body cracking. Electrostatic discharge (ESD) and electric field shielding properties intended to protect electronic items from electric fields and ESD. Low charging properties intended to avoid charge accumulation on or in the bag that could be damaging to ESD susceptible items. Surface resistance properties intended to allow charge to dissipate from the interior or exterior surface of the bag when the respective surface is grounded. These bags are typically constructed from metal foil and plastic layers, and contain or are coated with an antistat agent. Surface resistance properties may differ between interior and exterior surfaces. Level 2: Moisture Barrier Bag for General Packaging This bag provides the following properties intended to protect ESD and moisture susceptible items: Moisture barrier properties intended to protect items that will not be subjected to reflow soldering. ESD and electric field shielding properties intended to protect electronic items from ESD. Low charging properties intended to avoid charge accumulation on or in the bag that could be damaging to ESD susceptible items. Surface resistance properties intended to allow charge to dissipate from the interior or exterior surface of the bag when the respective surface is grounded. These bags are typically constructed from multiple layers of metalized plastic and contain or are coated with an antistat agent. Surface resistance properties may differ between interior and exterior surfaces. Level 3: Static Shielding Bag This bag provides the following properties intended to protect ESD susceptible items: ESD and electric field shielding properties intended to protect electronic items from ESD. 2

9 Low charging properties intended to avoid charge accumulation on or in the bag that could be damaging to ESD susceptible items. Surface resistance properties intended to allow charge to dissipate from the interior or exterior surface of the bag when the respective surface is grounded. Shielding bags are typically constructed from a layer of transparent metalized plastic and plastic layers, and contain or are coated with an antistat agent. Surface resistance properties may differ between interior and exterior surfaces. Level 4: Conductive Bag This bag provides the following properties intended to protect ESD susceptible items: Surface and volume resistance properties intended to allow charge to dissipate from the bag to ground. Electric field shielding properties. NOTE: Does not provide ESD shielding properties. Conductive bags are typically constructed from extruded plastic containing conductive materials, and exhibit the same resistance properties on both interior and exterior surfaces. Level 5: Static Dissipative Bag This bag provides the following properties intended to protect ESD susceptible items: Low charging properties intended to avoid charge accumulation on or in the bag that could be damaging to ESD susceptible items. Surface resistance properties intended to allow charge to dissipate from the interior or exterior surface of the bag when the respective surface is grounded. Dissipative bags are typically constructed from extruded plastic containing or coated with an antistat agent, and exhibit the same surface resistance properties on both interior and exterior surfaces. Caution The user should evaluate the moisture and ESD susceptibility of the electronic item or assembly and confirm that the bag technical requirements set by this standard are appropriate for the application. 6.0 BAG MARKINGS Level 1, 2, 3, 4, and 5 bags shall be marked with the ESD Protective Symbol as defined by ANSI/ESD S8.1. Level 1 and 2 bags shall be marked with the moisture sensitive identification symbol shown in Figure 2 or as defined by IPC/JEDEC J-STD-033. Level 1, 2, 3, 4, and 5 bags should be marked with the word Level and the appropriate level number; for example, a shielding bag would be marked Level 3. All bags should be marked with information that allows traceability to the packaging manufacturer and to the manufacturer s date / lot code information. 3

10 Figure 1: ESD Protective Symbol Figure 2: Moisture Warning Symbol 7.0 TECHNICAL REQUIREMENTS The technical requirements shown in Table 1 are the required limits for bags. Table 1. Technical Requirements Level 1 Level 2 Level 3 Level 4 Level 5 Properties Technical Requirement Physical Electrical Cleanliness Moisture Vapor Transmission Rate (MVTR) Puncture Resistance Moisture Barrier Bag Moisture Barrier Bag <0.002 <0.02 Static Shielding Applicable Conductive Bag Applicable Static Dissipative Bag Applicable Units grams/100 in 2 /day >15 >15 >8 >5 >5 pounds Seal Strength >12 >12 >8 >5 >5 pounds per inch Thickness >0.004 >0.003 >0.002 >0.002 >0.002 inches Marking Adhesion Transparency ESD Shielding Surface Resistance - Interior Surface Resistance - Exterior Silicone Marking Legible Applicable Marking Legible Applicable Marking Legible 30 to 50 < 20 < 20 < 20 < 1.0x10 11 and > 1.0x10 4 < 1.0x10 11 and > 1.0x10 4 Marking Legible Applicable Applicable < 1.0x10 11 and > 1.0x10 4 < 1.0x10 4 Marking Legible visual 70 to 100 percent Applicable < 1.0x10 11 < 1.0x10 11 < 1.0x10 11 < 1.0x10 4 and < 1.0x10 11 > 1.0x10 4 Detected Detected Detected Detected nanojoule < 1.0x10 11 and > 1.0x10 4 ohms Detected ohms Test Method and Instructions ASTM F1249 See 8.1 MIL-STD Method 2065 See 8.2 ASTM D882 See 8.3 MIL-STD Method 1003 See 8.4 IPC-TM See 8.5 EMA Optical Density See 8.6 ANSI/ESD STM11.31 ANSI/ESD STM11.11 ANSI/ESD STM See 8.7 4

11 8.0 TESTING INSTRUCTIONS These instructions are intended to define or clarify the testing process. If there is a difference between the testing method and this standard, this standard shall be used. 8.1 Moisture Vapor Transmission Rate (MVTR) Measure the MVTR using ASTM F1249 at 37.7 C (100 F) and 100% RH. Level 1 bags will be flexed per condition E of ASTM F 392 prior MVTR testing. Level 2 bags will not be flexed prior to MVTR testing. 8.2 Puncture Resistance Measure the puncture resistance using MIL-STD-3010 test method Test six specimens. The heat sealable surface shall face the probe. The crosshead speed shall be 20 inches per minute. Figure 3: Seal Strength Test 8.3 Seal Strength Measure the seal strength using Method A of ASTM D882. Test six specimens. The specimen shall be cut from production bags and be 1 inch in width. Place the specimen into the clamps and separate the clamps at 2 inches per minute until the seal or material is separated. Record the maximum force. Report the average of the six values. See Figure Thickness Measure the thickness using MIL-STD-3010 test method 1003 method B. Measure the thickness of one side (layer) of the bag. Make 6 measurements. Report the average thickness to the nearest of an inch. 5

12 8.5 Marking Adhesion The adhesion of the factory-applied marking to the bag will be evaluated using IPC-TM-650 Test Method The marking shall remain visible and legible after tape removal. 8.6 Transparency Measure the optical density using an optical densitometer (Tobias Associates TBX-MC or equivalent) per European Metallizers Association (EMA) Technical Committee Films Optical Density Test procedure Rev 1. Make one measurement of one side (layer) of six bags. Convert the optical density value to percent transmission using the equipment instructions. Report the average of the six measurements. 8.7 Silicone Compare spectrum from the bag interior and exterior with that of silicone, using ASTM E168. The absorbance bands should not match, indicating that silicone is not present. 6

13 (This annex is not part of ESD Association Standard ANSI/ESD S ) ANNEX A (INFORMATIVE) BIBLIOGRAPHY MIL-PRF-81705, Barrier Materials, Flexible, Electrostatic Discharge Protective, Heat-Sealable ANSI/ESD STM11.12, Volume Resistance Measurements of Static Dissipative Planar Materials 7

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