EN IEC 61249-2-46:2018

SLOVENSKI STANDARD
01-oktober-2018
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Ta slovenski standard je istoveten z: EN IEC 61249-2-46:2018
ICS:
31.180 7LVNDQDYH]MD7,9LQWLVNDQH Printed circuits and boards
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61249-2-46

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 31.180
English Version
Materials for printed boards and other interconnecting structures
- Part 2-46: Reinforced base materials clad and unclad - Non-
halogenated epoxide non-woven/woven E-glass reinforced
laminate sheets of thermal conductivity (1.5W/m K) and defined
flammability (vertical burning test), copper-clad for lead-free
assembly
(IEC 61249-2-46:2018)
Matériaux pour circuits imprimés et autres structures Materialien für Leiterplatten und andere
d'interconnexion - Partie 2-46 : Matériaux de base Verbindungsstrukturen - Teil 2-46: Kaschierte und
renforcés, plaqués et non plaqués - Feuilles stratifiées unkaschierte verstärkte Basismaterialien -
renforcées en verre de type E tissé/non tissé époxyde non Kupferkaschierte, mit E-Glaswirrfaser im Kernbereich und
halogéné, plaquées cuivre de conductivité thermique E-Glasgewebe in den Außenlagen verstärkte Laminattafeln
(1,5W/m m•K) et d'inflammabilité définie (essai de auf der Basis von halogenfreiem Epoxidharz mit
combustion verticale) pour les assemblages sans plomb Wärmeleitfähigkeit (1,5 W/m•K) und definierter Brennbarkeit
(IEC 61249-2-46:2018) (vertikale Prüflingslage) für bleifreie Bestückungstechnik
(IEC 61249-2-46:2018)
This European Standard was approved by CENELEC on 2018-02-14. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61249-2-46:2018 E

European foreword
The text of document 91/1448/CDV, future edition 1 of IEC 61249-2-46, prepared by IEC/TC 91
"Electronics assembly technology" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61249-2-46:2018.

The following dates are fixed:
(dop) 2018-11-14
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-02-14
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61249-2-46:2018 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

ISO 9000 NOTE Harmonized as EN ISO 9000.
ISO 14001 NOTE Harmonized as EN ISO 14001.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61189-2 2006 Test methods for electrical materials, EN 61189-2 2006
printed boards and other interconnection
structures and assemblies -- Part 2: Test
methods for materials for interconnection
structures
IEC 61249-5-1 -  Materials for interconnection structures - EN 61249-5-1 -
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)
IEC/PAS 61249-6-3 -  Specification for finished fabric woven from - -
"E" glass for printed boards
ISO 11014 -  Safety data sheet for chemical products - - -
Content and order of sections
IEC 61249-2-46 ®
Edition 1.0 2018-01
INTERNATIONAL
STANDARD
Materials for printed boards and other interconnecting structures –

Part 2-46: Reinforced base materials clad and unclad – Non-halogenated

epoxide non-woven/woven E-glass reinforced laminate sheets of thermal

conductivity 1,5 W/(m•K) and defined flammability (vertical burning test),

copper-clad for lead-free assembly

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.180 ISBN 978-2-8322-5196-6

– 2 – IEC 61249-2-46:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions. 6
4 Materials and construction . 7
4.1 General . 7
4.2 Resin system . 7
4.3 Metal foil . 7
4.4 Reinforcement . 7
5 Electrical properties . 7
6 Non-electrical properties of the copper-clad laminate . 8
6.1 Appearance of the copper-clad sheet. 8
6.1.1 General . 8
6.1.2 Indentations (pits and dents) . 8
6.1.3 Wrinkles . 8
6.1.4 Scratches . 8
6.1.5 Raised areas . 9
6.2 Appearance of the unclad face . 9
6.3 Laminate thickness . 9
6.4 Bow and twist . 9
6.5 Properties related to the copper foil bond . 10
6.6 Punching and machining . 11
6.7 Dimensional stability. 11
6.8 Sheet sizes . 11
6.8.1 Typical sheet sizes . 11
6.8.2 Tolerances for sheet sizes . 11
6.9 Cut panels. 12
6.9.1 Cut panel sizes . 12
6.9.2 Size tolerances for cut panels . 12
6.9.3 Rectangularity of cut panels . 12
6.10 Thermal conductivity . 12
7 Non-electrical properties of the base material after complete removal of the copper
foil . 13
7.1 Appearance of the dielectric base material . 13
7.2 Flexural strength . 13
7.3 Flammability . 13
7.4 Water absorption . 14
7.5 Measling . 14
7.6 Glass transition temperature and cure factor . 14
7.7 Decomposition temperature . 15
7.8 Time to delamination (TMA) . 15
7.9 Halogen content . 15
8 Quality assurance . 15
8.1 Quality system . 15
8.2 Responsibility for inspection . 16
8.3 Qualification inspection . 16
8.4 Quality conformance inspection . 16

IEC 61249-2-46:2018 © IEC 2018 – 3 –
8.5 Certificate of conformance . 16
8.6 Safety data sheet . 16
9 Packaging and marking . 16
10 Ordering information . 17
Annex A (informative) Engineering information . 18
A.1 General . 18
A.2 Chemical properties . 18
A.3 Electrical properties . 18
A.4 Flammability properties . 18
A.5 Mechanical properties . 18
A.6 Physical properties . 18
A.7 Thermal properties . 19
Annex B (informative) Common laminate constructions . 20
Annex C (informative) Guideline for qualification and conformance inspection . 21
Bibliography . 22

Table 1 – Electrical properties . 7
Table 2 – Size of indentations . 8
Table 3 – Nominal thickness and tolerance of metal-clad laminate . 9
Table 4 – Bow and twist requirements . 10
Table 5 – Pull-off and peel strength requirements . 10
Table 6 – Dimensional stability . 11
Table 7 – Size tolerances for cut panels . 12
Table 8 – Rectangularity of cut panels . 12
Table 9 – Thermal conductivity . 12
Table 10 – Flexural strength requirements . 13
Table 11 – Flammability requirements . 14
Table 12 – Water absorption requirements . 14
Table 13 – Measling requirements . 14
Table 14 – Glass transition temperature and cure factor requirements . 15
Table 15 – Decomposition temperature requirements . 15
Table 16 – Time to delamination requirements. 15
Table 17 – Halogen content . 15
Table C.1 – Qualification and conformance inspection . 21

– 4 – IEC 61249-2-46:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MATERIALS FOR PRINTED BOARDS AND OTHER
INTERCONNECTING STRUCTURES –
Part 2-46: Reinforced base materials clad and unclad – Non-halogenated
epoxide non-woven/woven E-glass reinforced laminate sheets of
thermal conductivity 1,5 W/(m•K) and defined flammability
(vertical burning test), copper-clad for lead-free assembly

FOREWORD
1) 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 itself does not provide 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 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 61249-2-46 has been prepared by IEC technical committee 91:
Electronics assembly technology.
The text of this International Standard is based on the following documents:
CDV Report on voting
91/1448/CDV 91/1484/RVC
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.

IEC 61249-2-46:2018 © IEC 2018 – 5 –
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61249 series, under the general title Materials for printed boards
and other interconnecting structures, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

– 6 – IEC 61249-2-46:2018 © IEC 2018
MATERIALS FOR PRINTED BOARDS AND OTHER
INTERCONNECTING STRUCTURES –
Part 2-46: Reinforced base materials clad and unclad – Non-halogenated
epoxide non-woven/woven E-glass reinforced laminate sheets of
thermal conductivity 1,5 W/(m•K) and defined flammability
(vertical burning test), copper-clad for lead-free assembly

1 Scope
This part of IEC 61249 gives requirements for properties of non-halogenated epoxide
non-woven reinforced core/woven E-glass reinforced surface laminate sheets of thermal
conductivity and defined flammability (vertical burning test), copper-clad for lead-free assembly
in thicknesses of 0,60 mm up to 1,70 mm. The flammability rating is achieved through the use
of non-halogenated fire retardants reacted as part of the epoxide polymeric structure. The
glass transition temperature is defined to be 105 °C minimum. Thermal Conductivity is defined
to be (1,5 ± 0,2) W/(m•K).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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 61189-2:2006, Test methods for electrical materials, printed boards and other
interconnection structures and assemblies – Part 2: Test methods for materials for
interconnection structures
IEC 61249-5-1, Materials for interconnection structures – Part 5: Sectional specification set for
conductive foils and films with and without coatings – Section 1: Copper foils (for the
manufacture of copper-clad base materials)
IEC/PAS 61249-6-3, Specification for finished fabric woven from "E" glass for printed boards
ISO 11014, Safety data sheet for chemical products – Content and order of sections
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp

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