IEC 61249-2-45:2018

Materials for printed boards and other interconnecting structures - Part 2-45: Reinforced base materials clad and unclad - Non-halogenated epoxide non-woven/woven E-glass reinforced laminate sheets of thermal conductivity 1,0 W/(m•K) and defined flammability (vertical burning test), copper-clad for lead-free assembly

IEC 61249-2-45:2018 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 (1,0 ± 0,15) W/(m•K).

Matériaux pour circuits imprimés et autres structures d'interconnexion - Partie 2-45: Matériaux de base renforcés, plaqués et non plaqués - Feuilles stratifiées renforcées en verre de type E tissé/non tissé époxyde non halogéné, de conductivité thermique 1,0 W/(m•K) et d'inflammabilité définie (essai de combustion verticale), plaquées cuivre pour les assemblages sans plomb

L'IEC 61249-2-45:2018 fournit des exigences concernant les propriétés des feuilles stratifiées de surface renforcée en verre de type E tissé et à cœur renforcé non tissé époxyde non halogéné, de conductivité thermique et d'inflammabilité définie (essai de combustion verticale), plaquées cuivre pour les assemblages sans plomb, d'épaisseurs comprises entre 0,60 mm et 1,70 mm. Les caractéristiques d'inflammabilité sont obtenues en faisant réagir des ignifuges non halogénés qui font partie de la structure polymère époxyde. La température de transition vitreuse est définie comme étant d'au moins 105 °C. La conductivité thermique est définie comme étant de (1,0 ± 0,15) W/(m•K).

General Information

• Status: Published
• Publication Date: 09-Jan-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.180 - Printed circuits and boards
• Technical Committee: TC 91 - Electronics assembly technology
• Drafting Committee: WG 4 - TC 91/WG 4
• Current Stage: PPUB - Publication issued
• Start Date: 16-Jan-2018
• Completion Date: 10-Jan-2018

Standards Content (Sample)

IEC 61249-2-45 ®
Edition 1.0 2018-01
INTERNATIONAL
STANDARD
Materials for printed boards and other interconnecting structures –
Part 2-45: Reinforced base materials clad and unclad – Non-halogenated
epoxide non-woven/woven E-glass reinforced laminate sheets of thermal
conductivity 1,0 W/(m•K) and defined flammability (vertical burning test),
copper-clad for lead-free assembly
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 photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
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About the IEC
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International Standards for all electrical, electronic and related technologies.

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IEC 61249-2-45 ®
Edition 1.0 2018-01
INTERNATIONAL
STANDARD
Materials for printed boards and other interconnecting structures –

Part 2-45: Reinforced base materials clad and unclad – Non-halogenated

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

conductivity 1,0 W/(m•K) and defined flammability (vertical burning test),

copper-clad for lead-free assembly

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.180 ISBN 978-2-8322-5197-3

– 2 – IEC 61249-2-45:2018 © 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

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 61249-2-45:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MATERIALS FOR PRINTED BOARDS AND OTHER
INTERCONNECTING STRUCTURES –
Part 2-45: Reinforced base materials clad and unclad – Non-halogenated
epoxide non-woven/woven E-glass reinforced laminate sheets of
thermal conductivity 1,0 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 St
...

IEC 61249-2-45 ®
Edition 1.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Materials for printed boards and other interconnecting structures –
Part 2-45: Reinforced base materials clad and unclad – Non-halogenated epoxide
non-woven/woven E-glass reinforced laminate sheets of thermal conductivity
1,0 W/(m•K) and defined flammability (vertical burning test), copper-clad for
lead-free assembly
Matériaux pour circuits imprimés et autres structures d'interconnexion –
Partie 2-45: Matériaux de base renforcés, plaqués et non plaqués – Feuilles
stratifiées renforcées en verre de type E tissé/non tissé époxyde non halogéné,
de conductivité thermique 1,0 W/(m•K) et d'inflammabilité définie (essai de
combustion verticale), plaquées cuivre pour les assemblages sans plomb

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 photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary

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IEC publications issued since 2002. Some entries have been
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If you wish to give us your feedback on this publication or CISPR.

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IEC 61249-2-45 ®
Edition 1.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Materials for printed boards and other interconnecting structures –

Part 2-45: Reinforced base materials clad and unclad – Non-halogenated epoxide

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

1,0 W/(m•K) and defined flammability (vertical burning test), copper-clad for

lead-free assembly
Matériaux pour circuits imprimés et autres structures d'interconnexion –

Partie 2-45: Matériaux de base renforcés, plaqués et non plaqués – Feuilles

stratifiées renforcées en verre de type E tissé/non tissé époxyde non halogéné,

de conductivité thermique 1,0 W/(m•K) et d'inflammabilité définie (essai de

combustion verticale), plaquées cuivre pour les assemblages sans plomb

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.180 ISBN 978-2-8322-9095-8

– 2 – IEC 61249-2-45:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Materials and construction . 6
4.1 General . 6
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 . 7
6.1 Appearance of the copper-clad sheet . 7
6.1.1 General . 7
6.1.2 Indentations (pits and dents) . 8
6.1.3 Wrinkles . 8
6.1.4 Scratches . 8
6.1.5 Raised areas . 8
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 . 15
7.7 Decomposition temperature . 15
7.8 Time to delamination (TMA) . 15
7.9 Halogen content . 15
8 Quality assurance . 16
8.1 Quality system . 16
8.2 Responsibility for inspection . 16
8.3 Qualification inspection . 16

8.4 Quality conformance inspection . 16
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 .
...