oSIST prEN IEC 61249-2-53:2025
(Main)Materials for printed boards and other interconnecting structures - Part 2-53: Reinforced base materials clad and unclad - PTFE unfilled laminate sheets of defined flammability (vertical burning test), copper-clad
Materials for printed boards and other interconnecting structures - Part 2-53: Reinforced base materials clad and unclad - PTFE unfilled laminate sheets of defined flammability (vertical burning test), copper-clad
IEC 61249-2-53:2025 specifies requirements for properties of PTFE unfilled reinforced laminated sheet of a thickness 0,05 mm up to 10,0 mm of defined flammability (vertical burning test), copper-clad. This part of IEC 61249 is applicable to the design, manufacture, use of PTFE unfilled reinforced laminated sheet of defined flammability (vertical burning test), copper-clad. Its flame resistance is defined in terms of the flammability requirements of 8.4.
Werkstoffe für Leiterplatten und andere Verbindungsstrukturen - Teil 2-53: Kaschierte und unkaschierte verstärkte Basismaterialien - ungefüllte PTFE-Laminattafeln mit definierter Brennbarkeit (Brennprüfung mit vertikaler Prüflingslage), kupferkaschiert
Matériaux pour circuits imprimés et autres structures d’interconnexion - Partie 2-53: Matériaux de base renforcés, métallisés et non métallisés - Feuilles stratifiées non chargées en PTFE d’inflammabilité définie (essai de combustion verticale), plaquées cuivre
L'IEC 61249-2-53:2025 fournit les exigences relatives aux propriétés des feuilles stratifiées renforcées non chargées en PTFE d'une épaisseur comprise entre 0,05 mm et 10,0 mm, d'inflammabilité définie (essai de combustion verticale), plaquées cuivre. La présente partie de l'IEC 61249 s'applique à la conception, à la fabrication et à l'utilisation des feuilles stratifiées renforcées non chargées en PTFE d'inflammabilité définie (essai de combustion verticale), plaquées cuivre. Sa résistance à la flamme est définie en fonction des exigences d'inflammabilité de 8.4.
Materiali za plošče tiskanih vezij in druge povezovalne strukture - 2-53. del: Pokovinjeni in nepokovinjeni ojačeni osnovni materiali, bakrena obloga
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 61249-2-53:2024
01-december-2024
Materiali za plošče tiskanih vezij in druge povezovalne strukture - 2-53. del:
Pokovinjeni in nepokovinjeni ojačeni osnovni materiali
Materials for printed boards and other interconnecting structures - Part 2-53: Reinforced
base materials clad and unclad - PTFE unfilled laminate sheets of defined flammability
(vertical burning test), copper-clad
Matériaux pour circuits imprimés et autres structures d’interconnexion - Partie 2-53:
Matériaux de base renforcés, métallisés et non métallisés - Feuilles stratifiées non
chargées en PTFE d’inflammabilité définie (essai de combustion verticale), plaquées
cuivre
Ta slovenski standard je istoveten z: prEN IEC 61249-2-53:2024
ICS:
31.180 Tiskana vezja (TIV) in tiskane Printed circuits and boards
plošče
oSIST prEN IEC 61249-2-53:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN IEC 61249-2-53:2024
oSIST prEN IEC 61249-2-53:2024
91/1978/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61249-2-53 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-10-11 2025-01-03
SUPERSEDES DOCUMENTS:
91/1913/CD, 91/1975/CC
IEC TC 91 : ELECTRONICS ASSEMBLY TECHNOLOGY
SECRETARIAT: SECRETARY:
Japan Mr Osamu IKEDA
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the
final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Materials for printed boards and other interconnecting structures - Part 2-53: Reinforced base
materials clad and unclad - PTFE unfilled laminate sheets of defined flammability (vertical
burning test), copper-clad
PROPOSED STABILITY DATE: 2031
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for
any other purpose without permission in writing from IEC.
oSIST prEN IEC 61249-2-53:2024
IEC CDV 61249-2-53 © IEC 2024 – 2 – 91/1978/CDV
1 CONTENTS
3 FOREWORD . 4
4 1 Scope . 6
5 2 Normative references . 6
6 3 Terms and definitions . 7
7 4 Construction and Materials . 7
8 4.1 Construction . 7
9 4.2 Resin system . 7
10 4.3 Metal foil . 7
11 4.4 Reinforcement . 7
12 5 Internal marking . 7
13 6 Electrical properties . 7
14 7 Non-electrical properties of the copper-clad laminate . 8
15 7.1 Appearance of the copper-clad sheet . 8
16 7.1.1 General . 8
17 7.1.2 Indentations (pits and dents) . 8
18 7.1.3 Wrinkles . 9
19 7.1.4 Scratches . 9
20 7.1.5 Raised areas . 9
21 7.1.6 Surface waviness . 9
22 7.2 Appearance of the unclad face . 9
23 7.3 Laminate thickness . 9
24 7.4 Bow and twist . 10
25 7.5 Properties related to the copper foil bond . 10
26 7.6 Heat shock . 10
27 7.7 Machining . 11
28 7.8 Dimensional stability . 11
29 7.9 Sheet sizes and tolerances . 11
30 7.9.1 Typical sheet sizes . 11
31 7.9.2 Tolerances for sheet sizes . 11
32 7.10 Cut panels size, tolerances and rectangularity . 11
33 7.10.1 Cut panel sizes . 11
34 7.10.2 Size tolerances for cut panels . 11
35 7.10.3 Rectangularity of cut panels . 12
36 8 Non-electrical properties of the base material after complete removal of the
37 copper foil . 12
38 8.1 Appearance of the dielectric base material . 12
39 8.2 Flexural strength . 12
40 8.3 Flammability . 12
41 8.4 Water absorption . 13
42 8.5 Glass transition temperature and cure factor . 13
43 8.6 Decomposition temperature . 13
44 8.7 Time to delamination (TMA) . 13
45 8.8 Z-axis expansion . 13
46 8.9 X/Y-axis expansion . 14
47 8.10 Thermal Conductivity . 14
oSIST prEN IEC 61249-2-53:2024
IEC CDV 61249-2-53 © IEC 2024 – 3 – 91/1978/CDV
48 9 Quality assurance . 14
49 9.1 Quality system . 14
50 9.2 Responsibility for inspection . 14
51 9.3 Qualification inspection . 14
52 9.3.1 General . 14
53 9.3.2 Samples . 14
54 9.3.3 Frequency . 14
55 9.3.4 Criterion Rule . 15
56 9.4 Quality Conformance inspection . 15
57 9.4.1 General . 15
58 9.4.2 Inspection lot . 15
59 9.4.3 Group A inspection . 15
60 9.4.4 Group B inspection . 16
61 9.4.5 Group C inspection . 16
62 9.4.6 Criterion Rule . 16
63 9.4.7 Rejected lots . 16
64 9.5 Certificate of conformance . 16
65 9.6 Safety data sheet . 16
66 10 Packaging and marking . 16
67 11 Ordering information . 16
68 Annex A (informative) Engineering information . 18
69 A.1 General . 18
70 A.2 Electrical properties . 18
71 A.3 Non-electrical properties of the base material after complete removal of the
72 copper foil . 18
73 Bibliography . 19
75 Table 1 – Electrical properties . 7
76 Table 2 – Indentations . 8
77 Table 3 – Nominal thickness and tolerance of metal-clad laminate . 9
78 Table 4 – Bow and twist requirements . 10
79 Table 5 – Peel strength requirements . 10
80 Table 6 – Heat shock requirements . 10
81 Table 7 – Dimensional stability . 11
82 Table 8 – Size tolerances for cut panels . 11
83 Table 9 – Rectangularity of cut panels . 12
84 Table 10 – Flammability requirements . 13
85 Table 11 – Water absorption requirements . 13
86 Table 12 – Decomposition temperature requirements . 13
87 Table 13 – Time to delamination requirements . 13
88 Table 14 – Z-axis expansion requirements . 14
89 Table 15 – X/Y-axis expansion requirements . 14
90 Table 16 – Qualification and conformance inspection . 14
oSIST prEN IEC 61249-2-53:2024
IEC CDV 61249-2-53 © IEC 2024 – 4 – 91/1978/CDV
93 INTERNATIONAL ELECTROTECHNICAL COMMISSION
94 ____________
96 MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING
97 STRUCTURES –
99 Part 2-53: Reinforced base materials clad and unclad – PTFE unfilled
100 laminate sheets of defined flammability (vertical burning test), copper-
101 clad
105 FOREWORD
106 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
...
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