1、 IEC 62333-3Edition 1.0 2010-01INTERNATIONAL STANDARD NORME INTERNATIONALENoise suppression sheet for digital devices and equipment Part 3: Characterization of parameters of noise suppression sheet Plaque rduisant le bruit des dispositifs et appareils numriques Partie 3: Caractrisation des paramtres
2、 des plaques rduisant le bruit IEC62333-3:2010 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including p
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16、z des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 62333-3Edition 1.0 2010-01INTERNATIONAL STANDARD NORME INTERNATIONALENoise suppression sheet for digital devices and equipment Part 3: Characterization of parameters
17、 of noise suppression sheet Plaque rduisant le bruit des dispositifs et appareils numriques Partie 3: Caractrisation des paramtres des plaques rduisant le bruit INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE LICS 29.100.10 PRICE CODECODE PRIXISBN 2-8318-1075-9 R
18、egistered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 62333-3 IEC:2010 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references .6 3 Terms and definitions .7 4 General 7 5 Parameters, descriptions and measuring
19、 methods8 5.1 Material properties 8 5.1.1 Surface resistivity8 5.1.2 Mechanical characteristics.8 5.1.3 Thermal conductivity8 5.1.4 Environmental conditions.9 5.1.5 Statement for non-usage of the prohibited chemical materials .10 5.2 Structure .10 5.2.1 Thickness 10 5.2.2 Layer structure 10 Bibliogr
20、aphy11 Figure 1 Framework of IEC 62333 series for noise suppression sheet5 Figure 2 Schematic diagram of thermal conductivity measuring apparatus .9 Figure 3 Structure of NSS 10 Table 1 Structural example 10 62333-3 IEC:2010 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ NOISE SUPPRESSION SHEET FOR D
21、IGITAL DEVICES AND EQUIPMENT Part 3: Characterization of parameters of noise suppression sheet FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of
22、IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PA
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24、h the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as ne
25、arly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in th
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28、any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest
29、edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether
30、 direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indis
31、pensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62333-
32、3 has been prepared IEC technical committee 51: Magnetic components and ferrite materials. The text of this standard is based on the following documents: FDIS Report on voting 51/970/FDIS 51/977/RVD Full information on the voting for the approval of this standard can be found in the report on voting
33、 indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 62333 series, under the general title Magnetic components and ferrite materials, can be found on the IEC website. 4 62333-3 IEC:2010 The committee has de
34、cided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition
35、, or amended. 62333-3 IEC:2010 5 INTRODUCTION There are established standards for noise suppression sheet (NSS) as in IEC 62333-1 and in IEC 62333-2. Figure 1 shows the framework of IEC 62333 series for NSS. Part 1 issues the general guidelines of IEC 62333 series. Part 2 establishes measurement met
36、hods of four important suppression ratios for NSS. This Part 3 specifies characterization of each parameter except suppression ratio of NSS, which is determined in Part 2. Parameters prescribed in this part are divided into material properties and structure. Figure 1 Framework of IEC 62333 series fo
37、r noise suppression sheet Part 1: Definitions and general properties Suppression ratio (Rda, Rde, Rtpand Rrs) Others Part 2: Measuring methods Suppression ratio (Rda, Rde, Rtpand Rrs) Part 3: Characterization of parameters of noise suppression sheet Material properties Structure IEC 62333-1 IEC 6233
38、3-2 and IEC 62333-3 IEC 2618/09 6 62333-3 IEC:2010 NOISE SUPPRESSION SHEET FOR DIGITAL DEVICES AND EQUIPMENT Part 3: Characterization of parameters of noise suppression sheet 1 Scope This part of IEC 62333 provides characterization of parameters for electromagnetic noise suppression sheet (NSS) for
39、digital devices and equipment used in a frequency range between 30 MHz to 30 GHz. Guidance is given for uniform presentation of the properties of noise suppression sheet, intended for use in manufacturers and users technical data. NSS suppresses noise at its source, rather than absorbing noise at a
40、distance. Therefore NSS is distinguished from RF wave absorbers used in free space. This standard addresses the following purposes of NSS manufacturers and users: it assists users in understanding the published technical data in catalogues; it guides users in selecting the most preferable NSS for ea
41、ch application; it establishes measurement benchmarking for manufacturers of performance in new development of NSS; and it maintains high reliability of NSS and applied products. The numerical values given in this standard are typical values of parameters (properties) of the related NSS. The purpose
42、 of NSS testing is the benchmarking of materials. Predictions of specific device performance values are not always easy or even possible. Every detailed material and NSS specification should be agreed between the user and the manufacturer. 2 Normative references The following referenced documents ar
43、e indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-1:1988, Environmental testing Part 1: General and guidance IEC 60068-2-1, En
44、vironmental testing Part 2-1: Tests Test A: Cold IEC 60068-2-2, Environmental testing Part 2-2: Tests Test B: Dry heat IEC 60093, Methods of test for volume resistivity and surface resistivity of solid electrical insulating materials ISO 527-1, Plastics Determination of tensile properties Part 1: Ge
45、neral principles ISO 1183-1:2004, Plastics Methods for determining the density non-cellular plastics Part 1: immersion method, liquid pyknometer method and titration method ISO 3611, Micrometer callipers for external measurement 62333-3 IEC:2010 7 ISO 22007-1, Plastics Determination of thermal condu
46、ctivity and thermal diffusivity Part 1: General principles ISO 22007-2, Plastics Determination of thermal conductivity and thermal diffusivity Part 2: Transient plane heat source (Hot Disc) method ISO 22007-3, Plastics Determination of thermal conductivity and thermal diffusivity Part 3: Temperature
47、 wave analysis method ISO 22007-4, Plastics Determination of thermal conductivity and thermal diffusivity Part 4: Laser flash method 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 density ratio of the mass of a sample to its volume, expresse
48、d in kg/m3or g/cm3 3.2 specific gravity ratio of material density (mass per unit volume) at 23 C to the density of gas-free distilled water at 23 C 3.3 tensile strength M (Youngs modulus, Et) maximum tensile stress sustained by the test specimen during a tensile test. It is expressed in MPa ISO 527-
49、1:1993, definition 4.3.3 4 General In selecting the optimum NSS, apart from the noise suppression ratios specified in Part 2, material properties and structure are important factors. Part 3 hereby, specifies measurement methods and data presentation methods of each parameter except suppression ratio of NSS. Part 2 gives guidance on suppression characteristics
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