SIST EN 61249-2-26:2005

STANDARDMateriali za tiskane plošče in druge povezovalne strukture – 2-26. del: Pokovinjeni in nepokovinjeni ojačeni osnovni materiali - Z bakrom pokovinjeni laminat z določeno gorljivostjo (navpični preskus gorljivosti), ojačen z nehalogeniziranim epoksidnim netkanim/tkanim E-steklomMaterials for printed boards and other interconnecting structures – Part 2-26: Reinforced base materials, clad and unclad – Non-halogenated epoxide non-woven/woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad©
Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 61249-2-26:2005(en)ICS31.180

EUROPEAN STANDARD
EN 61249-2-26 NORME EUROPÉENNE EUROPÄISCHE NORM
March 2005 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61249-2-26:2005 E
ICS 31.180
English version
Materials for printed boards and other interconnecting structures Part 2-26: Reinforced base materials, clad and unclad –
Non-halogenated epoxide non-woven/woven E-glass reinforced
laminated sheets of defined flammability
(vertical burning test), copper-clad (IEC 61249-2-26:2005)
Matériaux pour circuits imprimés
et autres structures d'interconnexion Partie 2-26: Matériaux de base renforcés, plaqués et non plaqués –
Feuilles stratifiées renforcées en tissu
de verre de type époxyde tissé/non tissé, non-halogéné, d'inflammabilité définie (essai de combustion verticale),
plaquées cuivre (CEI 61249-2-26:2005)
Materialien für Leiterplatten
und andere Verbindungsstrukturen Teil 2-26: Kaschierte und unkaschierte verstärkte Basismaterialien – Kupferkaschierte halogenfreie mit E-Glas-Wirrfaser-Innenlagen/E-Glas-Gewebe-Decklagen verstärkte Epoxidharz-Laminattafeln definierter Brennbarkeit (Brennprüfung mit vertikaler Prüflingslage)(IEC 61249-2-26:2005)
This European Standard was approved by CENELEC on 2005-02-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Foreword The text of document 91/496/FDIS, future edition 1 of IEC 61249-2-26, prepared by IEC TC 91, Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61249-2-26 on 2005-02-01. The following dates were fixed: – latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop)
2005-11-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)
2008-02-01 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard IEC 61249-2-26:2005 was approved by CENELEC as a European Standard without any modification. _________

- 3 - EN 61249-2-26:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications The following referenced documents are 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. NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60194 1999 Printed board design, manufacture and assembly - Terms and definitions
- - IEC 61189-2 1997 Test methods for electrical materials, printed boards and other interconnection structures and assemblies Part 2: Test methods for materials for interconnection structures
EN 61189-2 + corr. August 1997 1997 IEC 61249-5-1 1995 Materials for interconnection structures Part 5: Sectional specification set for conductive foils and films with or without coatings - Section 1: Copper foils (for the manufacture of copper-clad base materials)
EN 61249-5-1 1996 ISO 9000 2000 Quality management systems - Fundamentals and vocabulary
EN ISO 9000 2000 ISO 11014-1 1994 Safety data sheet for chemical products Part 1: Content and order of sections
- - ISO 14001 1996 Environmental management systems Specification with guidance for use EN ISO 14001 1996

NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD61249-2-26Première éditionFirst edition2005-01Matériaux pour circuits impriméset autres structures d'interconnexion – Partie 2-26: Matériaux de base renforcés, plaqués et non plaqués – Feuilles stratifiées renforcées en tissu de verre de type E époxyde tissé/ non tissé, non halogéné, d'inflammabilité définie (essai de combustion verticale), plaquées cuivre Materials for printed boards and other interconnecting structures – Part 2-26: Reinforced base materials clad and unclad – Non-halogenated epoxide non-woven/woven E-glass reinforced laminated sheetsof defined flammability (vertical burning test), copper-cladPour prix, voir catalogue en vigueur For price, see current catalogue© IEC 2005
Droits de reproduction réservés
⎯
Copyright - all rights reservedAucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission,
3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch
Web: www.iec.ch CODE PRIX PRICE CODE SCommission Electrotechnique InternationaleInternational Electrotechnical Commission

61249-2-26© IEC:2005 – 3 – CONTENTSFOREWORD.71Scope.132Normative references.133Materials and construction.153.1Resin system.153.2Reinforcement.153.3Metal foil.154Internal marking.155Electrical Properties.156Non-Electrical properties of the copper-clad laminate.176.1Appearance of the copper-cladsheet.176.2Appearance of the uncladface.216.3Laminate Thickness.216.4Bow and twist.216.5Properties related to the copper foil bond.236.6Punching and machining.236.7Dimensionalstability.236.8Sheet sizes.256.9Cut panels.257Non-electrical properties of the base material after complete removalof the copper foil.277.1Appearance of the dielectric base material.277.2Flexural Strength.297.3Flammability.297.4Water absorption.317.5Measling.317.6Glass transition temperature and cure factor.318Quality assurance.318.1Quality system.318.2Responsibility for inspection.338.3Qualification inspection.338.4Quality conformance inspection.338.5Certificate of conformance.339Packaging and marking.3310Ordering information.35Annex A (informative)
Engineering information.37Annex B (informative)
Common laminate constructions.41Annex C (informative)
Guideline for qualification and conformance inspection.43

61249-2-26© IEC:2005 – 5 – Table 1 – Electrical properties.17Table 2 – Nominal thickness and tolerance of metal-clad laminate.21Table 3 – Bow and twist.21Table 4 – Pull-off and peel strength.23Table 5 – Dimensional stability.25Table 6 – Size tolerance for cut panels.27Table 7 – Rectangularity of cut panels.27Table 8 – Flexural strength.29Table 9 – Flammability.29Table 10 – Water absorption.31Table 11– Measling.31Table 12 – Glass transition temperature and cure factor.31

61249-2-26© IEC:2005 – 7 – INTERNATIONAL ELECTROTECHNICAL COMMISSION ___________MATERIALS FOR PRINTED BOARDS ANDOTHER INTERCONNECTING STRUCTURES –Part 2-26: Reinforced base materials clad and unclad – Non-halogenated epoxide non-woven/woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad FOREWORD1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of 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 (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with 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 nearly 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 that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest 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 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 indispensable 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 61249-2-26 has been prepared by IEC technical committee 91: Electronics assembly technology. The text of this standard is based on the following documents: FDIS Report on voting 91/496/FDIS 91/506/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table.

61249-2-26© IEC:2005 – 9 – This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. IEC 61249-2 consists of the following parts, under the general title Materials for printed boards and other interconnecting structures – Part 2: Reinforced base materials, clad and unclad:Part 2-1: Phenolic cellulose paper reinforced laminated sheets, economic grade, copper cladPart 2-2: Phenolic cellulose paper reinforced laminated sheets, high electrical grade, copper-cladPart 2-4: Polyester non-woven/woven fibreglass laminated sheets of defined flammability (vertical burning test), copper-clad Part 2-5: Brominated epoxide cellulose paper reinforced core/woven E-glass reinforced surfaces laminate sheets of defined flammability (vertical burning test), copper-cladPart 2-6: Brominated epoxide non-woven/woven, E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-cladPart 2-7: Epoxide woven E-glass laminated sheet of defined flammability (vertical burning test), copper-clad Part 2-8: Modified brominated epoxide woven fibreglass reinforced laminated sheets of defined flammability (vertical burning test), copper-cladPart 2-9: Bismaleimide/triazine, modified epoxide or unmodified, woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-cladPart 2-10: Cyanate ester, brominated epoxide, modified or unmodified, woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-cladPart 2-11: Polyimide, brominated epoxide modified or unmodified, woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-cladPart 2-12: Epoxide non-woven aramid laminate of defined flammability, copper-clad Part 2-13: Cyanate ester non-woven aramid laminate of defined flammability, copper-clad Part 2-18: Polyester non-woven fibreglass reinforced laminated sheet of defined flammability (vertical burning test), copper-clad Part 2-19: Epoxide cross-plied linear fibreglass-reinforced laminated sheets of defined flam-mability (vertical burning test), copper-clad Part 2-21: Non-halogenated epoxide woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-cladPart 2-22: Modified non-halogenated epoxide woven E-glass laminated sheets of defined flammability (vertical burning test), copper-clad Part 2-23: Non-halogenated phenolic, cellulose paper reinforced laminated sheets, economic grade, copper-clad Part 2-26: Non-halogenated epoxide, nonwoven/woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad

61249-2-26© IEC:2005 – 11 – The committee has decided 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, or • amended.

61249-2-26© IEC:2005 – 13 – MATERIALS FOR PRINTED BOARDS ANDOTHER INTERCONNECTING STRUCTURES –Part 2-26: Reinforced base materials clad and unclad – Non-halogenated epoxide non-woven/woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad 1 Scope This part of IEC 61249 gives requirements for properties of non-halogenated epoxide non-woven/woven reinforced E-glass laminated sheets of defined flammability (vertical burning test), copper-clad in thicknesses of 0,80 mm up to 1,60 mm. The flammability rating is achieved through the use of non-halogenated inorganic and/or organic compounds acting as fire retardants. These fire retardants are contained as part of polymeric structure or in addition to it. The glass transition temperature is defined to be 95 °C minimum. Some property requirements may have several classes of performance. The class desired must be specified on the purchase order, otherwise the default class of material may be supplied.2 Normative references The following referenced documents are 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 60194:1999, Printed board design, manufacture and assembly – Terms and definitions IEC 61189-2:1997, Test methods for electrical materials, interconnection structures and assemblies – Part 2: Test method for interconnection structuresIEC 61249-5-1:1995, Materials for interconnection structures – Part 5: Sectional specification set for conductive foils and films with or without coatings – Section 1: Copper foils (for the manufacture of copper-clad base materials)ISO 9000:2000, Quality management systems – Fundamentals and vocabularyISO 11014-1:1994, Safety data sheet for chemical products – Part 1: Content and order of sectionsISO 14001:1996, Environmental management systems – Specification with guidance for use

61249-2-26© IEC:2005 – 15 – 3 Materials and construction The sheet consists of an insulating base with metal-foil bonded to one side or both. Refer to IEC 60194 for terms and definitions. 3.1 Resin system
Non-halogenated epoxide with a glass transition temperature of 95 °C minimum. The maximum total halogens contained in the resin plus reinforcement matrix is 1 500 × 10–6 with a maximum chlorine of 900 × 10–6 and maximum bromine of 900 × 10–6 . Contrast agents may be added to enhance processing such as automated optical inspection (AOI).Its flame resistance
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