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BS EN 61249-2-44:2016

BS EN 61249-2-44:2016

$142.49

Materials for printed boards and other interconnecting structures – Reinforced base materials clad and unclad. Non-halogenated epoxide non-woven/woven E-glass reinforced laminate sheets of defined flammability (vertical burning test), copper-clad for lead-free assembly

Published By Publication Date Number of Pages
BSI 2016 28
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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 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.

Some property requirements may have several classes of performance. The class desired should be specified on the purchase order, otherwise the default class of material will be supplied.

PDF Catalog

PDF Pages PDF Title
4 European foreword
Endorsement notice
5 Annex ZA (normative) Normative references to international publications with their corresponding European publications
6 English
CONTENTS
8 FOREWORD
10 1 Scope
2 Normative references
3 Materials and construction
3.1 General
3.2 Resin system
11 3.3 Metal foil
3.4 Reinforcement
4 Internal marking
5 Electrical properties
6 Non-electrical properties of the copper-clad laminate
6.1 Appearance of the copper-clad sheet
6.1.1 General
Tables
Table 1 – Electrical properties
12 6.1.2 Indentations (pits and dents)
6.1.3 Wrinkles
6.1.4 Scratches
6.1.5 Raised areas
Table 2 – Size of indentations
13 6.1.6 Surface waviness
6.2 Appearance of the unclad face
6.3 Laminate thickness
6.4 Bow and twist
Table 3 – Nominal thickness and tolerance of metal-clad laminate
14 6.5 Properties related to the copper foil bond
Table 4 – Bow and twist requirements
Table 5 – Pull-off and peel strength requirements
15 6.6 Punching and machining
6.7 Dimensional stability
6.8 Sheet sizes
6.8.1 Typical sheet sizes
6.8.2 Tolerances for sheet sizes
Table 6 – Dimensional stability
16 6.9 Cut panels
6.9.1 Cut panel sizes
6.9.2 Size tolerances for cut panels
6.9.3 Rectangularity of cut panels
7 Non-electrical properties of the base material after complete removal of the copper foil
7.1 Appearance of the dielectric base material
Table 7 – Size tolerances for cut panels
Table 8 – Rectangularity of cut panels
17 7.2 Flexural strength
7.3 Flammability
Table 9 – Flexural strength requirements
Table 10 – Flammability requirements
18 7.4 Water absorption
7.5 Measling
7.6 Glass transition temperature and cure factor
7.7 Decomposition temperature
Table 11 – Water absorption requirements
Table 12 – Measling requirements
Table 13 – Glass transition temperature and cure factor requirements
Table 14 – Decomposition temperature requirements
19 7.8 Time to delamination (TMA)
8 Quality assurance
8.1 Quality system
8.2 Responsibility for inspection
8.3 Qualification inspection
8.4 Quality conformance inspection
8.5 Certificate of conformance
Table 15 – Time to delamination requirements
20 8.6 Safety data sheet
9 Packaging and marking
10 Ordering information
21 Annex A (informative) Engineering information
A.1 General
A.2 Chemical properties
A.3 Electrical properties
A.4 Flammability properties
A.5 Mechanical properties
A.6 Physical properties
22 A.7 Thermal properties
23 Annex B (informative) Common laminate constructions
24 Annex C (informative) Guideline for qualification and conformance inspection
Table C.1 – Qualification and conformance inspection
25 Bibliography

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BS EN 61249-2-44:2016
$142.49