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BS EN 61249-2-40:2013

BS EN 61249-2-40:2013

$142.49

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

Published By Publication Date Number of Pages
BSI 2013 28
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This part of IEC 61249 specifies requirements for properties of modified non-halogenated epoxide woven E-glass laminated sheet of a thickness of 0,05 mm up to 3,2 mm, of defined flammability (vertical burning test), copper-clad. The glass transition temperature is defined to be 170 °C minimum.

Its flame resistance is defined in terms of the flammability requirements of 7.3.

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
6 English
CONTENTS
8 1 Scope
2 Normative references
3 Materials and construction
3.1 General
3.2 Resin system
9 3.3 Metal foil
3.4 Reinforcement
4 Internal marking
5 Electrical properties
Tables
Table 1 – Electrical properties
10 6 Non-electrical properties of the copper-clad laminate
6.1 Appearance of the copper-clad sheet
6.1.1 General
6.1.2 Indentations (pits and dents)
6.1.3 Wrinkles
6.1.4 Scratches
Table 2 – Indentations
11 6.1.5 Raised areas
6.1.6 Surface waviness
6.2 Appearance of the unclad face
6.3 Laminate thickness
Table 3 – Nominal thickness and tolerance of metal-clad laminate
12 6.4 Bow and twist
6.5 Properties related to the copper foil bond
Table 4 – Bow and twist requirements
Table 5 – Pull-off and peel strength requirements
13 6.6 Punching and machining
6.7 Dimensional stability
Table 6 – Dimensional stability
14 6.8 Sheet sizes
6.8.1 Typical sheet sizes
6.8.2 Tolerances for sheet sizes
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
Table 7 – Size tolerances for cut panels
Table 8 – Rectangularity of cut panels
15 7 Non-electrical properties of the base material after complete removal of the copper foil
7.1 Appearance of the dielectric base material
7.2 Flexural strength
7.3 Flammability
Table 9 – Flexural strength requirements
16 7.4 Water absorption
7.5 Measling
Table 10 – Flammability requirements
Table 11 – Water absorption requirements
17 7.6 Glass transition temperature and cure factor
7.7 Decomposition temperature
7.8 Time to delamination
7.9 Z-axis expansion
Table 12 – Measling requirements
Table 13 – Glass transition temperature and cure factor requirements
Table 14 – Decomposition temperature requirements
Table 15 – Time to delamination requirements
18 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 16 – Z-axis expansion requirements
19 8.6 Safety data sheet
9 Packaging and marking
10 Ordering information
20 Annex A (informative) Engineering information
22 Annex B (informative) Common laminate constructions
Table B.1 – Thickness
24 Annex C (informative) Guideline for qualification and conformance inspection
Table C.1 – Qualification and conformance testing
25 Bibliography

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BS EN 61249-2-40:2013
$142.49