EN 61249-2-4:2002

SLOVENSKI STANDARD
01-september-2002
Materials for printed boards and other interconnecting structures - Part 2-4:
Reinforced base materials, clad and unclad - Polyester non-woven/woven
fibreglass laminated sheet of defined flammability (vertical burning test), copper-
clad
Materials for printed boards and other interconnecting structures -- Part 2-4: Reinforced
base materials, clad and unclad - Polyester non-woven/woven fibreglass laminated sheet
of defined flammability (vertical burning test), copper-clad
Materialien für Leiterplatten und andere Verbindungsstrukturen -- Teil 2-4: Kaschierte
und unkaschierte verstärkte Basismaterialien - Kupferkaschierte mit Glaswirrfaser-
Innenlagen/Glasgewebe-Deckenlagen verstärkte Polyesterharz-Laminattafeln mit
definierter Brennbarkeit (Brennprüfung mit vertikaler Prüflingslage)
Matériaux pour circuits imprimés et autres structures d'interconnexion -- Partie 2-4:
Matériaux de base renforcés, plaqués et non plaqués - Feuille stratifiée en fibres de
verre non tissées/tissées polyester, d'inflammabilité définie (essai de combustion
verticale), plaquée cuivre
Ta slovenski standard je istoveten z: EN 61249-2-4:2002
ICS:
31.180 7LVNDQDYH]MD7,9LQWLVNDQH Printed circuits and boards
SORãþH
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61249-2-4
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2002
ICS 31.180
English version
Materials for printed boards and other interconnecting structures
Part 2-4: Reinforced base materials, clad and unclad –
Polyester non-woven/woven fibreglass laminated sheet
of defined flammability (vertical burning test), copper-clad
(IEC 61249-2-4:2001)
Matériaux pour circuits imprimés et Materialien für Leiterplatten und
autres structures d'interconnexion andere Verbindungsstrukturen
Partie 2-4: Matériaux de base renforcés, Teil 2-4: Kaschierte und unkaschierte
plaqués et non plaqués – verstärkte Basismaterialien -
Feuille stratifiée en fibres de verre Kupferkaschierte mit Glaswirrfaser-
non tissées/tissées polyester, Innenlagen/Glasgewebe-Deckenlagen
d'inflammabilité définie verstärkte Polyesterharz-Laminattafeln
(essai de combustion verticale), mit definierter Brennbarkeit
plaquée cuivre (Brennprüfung mit vertikaler Prüflingslage)
(CEI 61249-2-4:2001) (IEC 61249-2-4:2001)
This European Standard was approved by CENELEC on 2002-03-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
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
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61249-2-4:2002 E
Foreword
The text of document 91/267/FDIS, future edition 1 of IEC 61249-2-4, prepared by IEC TC 91,
Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 61249-2-4 on 2002-03-01.
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) 2002-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-03-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex ZA is normative and annex A is informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61249-2-4:2001 was approved by CENELEC as a
European Standard without any modification.
__________
- 3 - EN 61249-2-4:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 61189-2 1997 Test methods for electrical materials, EN 61189-2 1997
printed boards and other + corr. August 1997
interconnection structures and
assemblies
Part 2: Test methods for materials for
interconnection structures
A1 2000 A1 2000
IEC 61249-5-1 1995 Materials for interconnection structures EN 61249-5-1 1996
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)
ISO 9000 2000 Quality management systems EN ISO 9000 2000
Fundamentals and vocabulary
ISO 11014-1 1994 Safety data sheet for chemical products--
Part 1: Content and order of sections
ISO 14001 1996 Environmental management systems EN ISO 14001 1996
Specification with guidance for use

NORME
CEI
INTERNATIONALE IEC
61249-2-4
INTERNATIONAL
Première édition
STANDARD
First edition
2001-12
Matériaux pour circuits imprimés
et autres structures d'interconnexion –
Partie 2-4:
Matériaux de base renforcés, plaqués et non
plaqués – Feuille stratifiée en fibres de verre
non tissées/tissées polyester, d'inflammabilité
définie (essai de combustion verticale),
plaquée cuivre
Materials for printed boards and other
interconnecting structures –
Part 2-4:
Reinforced base materials, clad and unclad –
Polyester non-woven/woven fibreglass laminated
sheet of defined flammability (vertical burning
test), copper-clad
© IEC 2001 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
R
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61249-2-4 © IEC:2001 – 3 –
CONTENTS
FOREWORD.5
1 Scope .9
2 Normative references.9
3 Materials and construction .9
3.1 Insulating base .9
3.2 Metal foil.11
3.3 Reinforcement .11
4 Internal marking.11
5 Electrical properties .11
6 Non-electrical properties of the copper-clad laminate .11
6.1 Appearance of the copper-clad sheet .11
6.2 Appearance of the unclad face.15
6.3 Laminate thickness .15
6.4 Bow and twist .15
6.5 Properties related to the copper foil bond .15
6.6 Punching and machining .17
6.7 Dimensional stability .17
6.8 Sheet sizes.19
6.9 Cut panels .19
7 Non-electrical properties of the base material after removal of the copper foil.21
7.1 Appearance of the dielectric base material .21
7.2 Flexural strength.21
7.3 Flammability .23
7.4 Water absorption .23
7.5 Measling.23
7.6 Glass transition temperature and cure factor .25
7.7 Thermal coefficient of expansion.25
8 Quality assurance .25
8.1 Quality system .25
8.2 Responsibility for inspection.25
8.3 Qualification inspection.25
8.4 Quality conformance inspection .25
8.5 Certificate of conformance .27
8.6 Safety data sheet.27
9 Packaging and marking.27
10 Ordering information .27
11 Acceptance testing.29
Annex A (informative) Conversion table for test method numbers.31

61249-2-4 © IEC:2001 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
MATERIALS FOR PRINTED BOARDS
AND OTHER INTERCONNECTING STRUCTURES –
Part 2-4: Reinforced base materials, clad and unclad –
Polyester non-woven/woven fibreglass laminated sheet of defined
flammability (vertical burning test), copper-clad
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61249-2-4 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
91/267/FDIS 91/275/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
Annex A is given for information only.

61249-2-4 © IEC:2001 – 7 –
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 laminate, economic grade
Part 2-2: Phenolic cellulose paper laminate, high electrical grade
Part 2-7: Epoxide woven E-glass laminated sheet of defined flammability (vertical burning
test), copper-clad
Part 2-9: Bismaleimide/triazine, epoxide modified or unmodified, woven E-glass laminated
sheet of defined flammability (vertical burning test), copper-clad
Part 2-10: Cyanate ester, epoxide modified or unmodified, woven E-glass laminated sheet of
defined flammability (vertical burning test), copper-clad
Part 2-11: Polyimide, epoxide modified or unmodified, woven E-glass laminated sheet of
defined flammability (vertical burning test), copper-clad
Part 2-18: Polyester non-woven fibreglass laminated sheet of defined flammability (vertical
burning test), copper-clad
Part 2-19: Epoxide coherent cross-plied linear fibreglass laminated sheet of defined
flammability (vertical burning test), copper-clad
The committee has decided that the contents of this publication will remain unchanged until
2004. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
___________
Under consideration
To be published
61249-2-4 © IEC:2001 – 9 –
MATERIALS FOR PRINTED BOARDS
AND OTHER INTERCONNECTING STRUCTURES –
Part 2-4: Reinforced base materials, clad and unclad –
Polyester non-woven/woven fibreglass laminated sheet of defined
flammability (vertical burning test), copper-clad
1 Scope
This standard gives requirements for properties of polyester woven fibreglass reinforced
surface/non-woven fibreglass reinforced core copper-clad laminated sheet, of defined
flammability, in thicknesses of 0,80 mm to 1,60 mm.
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 will 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 61189-2:1997, Test methods for electrical materials, interconnection structures and
assemblies – Part 2: Test methods for materials for interconnection structures
Amendment 1: 2000
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 Foil (for the
manufacture of copper-clad base materials)
ISO 9000:2000, Quality management systems – Fundamentals and vocabulary
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
3 Materials and construction
The sheet consists of an insulating base with metal-foil bonded to one side or both.
3.1 Insulating base
A laminate comprised of polyester woven fibreglass reinforced surface layers with a polyester
non-woven fibreglass reinforced core. Its flame resistance is defined in terms of the
flammability requirements of 7.3.

61249-2-4 © IEC:2001 – 11 –
3.2 Metal foil
Copper as specified in IEC 61249-5-1, copper foil (for the manufacture of copper-clad
materials). The preferred foils are electrodeposited, of defined ductility.
3.3 Reinforcement
Non-woven E-glass reinforcement: non-woven E-glass fabric (for the manufacture of copper-
clad materials).
Woven E-glass reinforcement: woven E-glass fabric (for the manufacture of copper-clad
materials).
4 Internal marking
None required.
5 Electrical properties
The electrical property requirements are shown in table 1.
Table 1 – Electrical properties requirements
Test method
Property Requirement
(IEC 61189-2)
As specified in
Resistance of foil 2E12
IEC 61249-5-1
Surface resistance after damp heat while in the humidity
2E03
≥1 000 MΩ
chamber (optional)
Surface resistance 2E03 ≥10 000 MΩ
Volume resistivity after damp heat while in the humidity
2E04 ≥1 000 MΩm
chamber (optional)
Volume resistivity after damp heat and recovery 2E04 ≥10 000 MΩm
Relative permittivity 2E10
≤4,1
Dissipation factor after damp heat and recovery 2E10 ≤0,030
To be agreed upon
Electric strength
2E11 between purchaser and
(less than 0,5 mm thickness)
supplier
Surface resistance at 125 °C 2E07 ≥500 MΩ
2E07
Volume resistivity at 125 °C ≥100 MΩm
6 Non-electrical properties of the copper-clad laminate
6.1 Appearance of the copper-clad sheet
The copper-clad face shall be substantially free from defects that may have an impact on the
materials’ fitness for use for the intended purpose.
For the following specific defects the requirements given shall apply when inspection is made in
accordance with IEC 61189-2 method 2M18.

61249-2-4 © IEC:2001 – 13 –
6.1.1 Indentations (pits and dents)
The size of an indentation, usually the length, shall be determined and given a point value to be
used as measure of the quality.
Size Point value
mm
for each indentation
0,13 – 0,25 1
0,26 – 0,50 2
0,51 – 0,75 4
0,76 – 1,00 7
over 1,00 30
The total point count for any 300 mm × 300 mm area shall be calculated to determine the class
of the material.
Class A 29 maximum
Class B 17 maximum
Class C 5 maximum
Class D 0
Class X to be agreed upon by user and supplier
The required class of material shall be specified in the purchase order. Class A applies, unless
otherwise specified.
6.1.2 Wrinkles
There shall be no wrinkles in the copper surface.
6.1.3 Scratches
Scratches deeper than 20 % of the nominal thickness of the foil are not permitted. For a thick
foil, the maximum scratch depth shall not exceed 10 µm.
Scratches with a depth less than 5 % of the nominal thickness of the foil shall not be counted
unless this depth is 10 µm or more.
Scratches with a depth between 5 % and 20 % of the nominal thickness of the foil are permitted
to a total length of 100 mm for a 300 mm × 300 mm area.
6.1.4 Raised areas
Raised areas are usually impressions in the press plates used during manufacture but may
also be caused by blisters or inclusions of foreign particles under the foil.
Raised areas caused by blisters or inclusions are not permitted.
Raised areas that are impressions of defects in press plates are permitted to the following
extent:
Class A and X material: maximum height 15 µm and maximum length 15 mm
Class B and C material: maximum height 8 µm
...