IEC 61249-2-12:1999 pdf download

IEC 61249-2-12:1999 pdf download.Materials for printed boards and other interconnecting structures
1 Scope
This part of IEC 61 249 gives requirements for properties of epoxide non-woven aramid copper-clad laminate of defined flammability, in thicknesses of 0,05 mm up to 6,4 mm.
NOTE To designate this material, the reference: 61 249-2-1 2-FV1 -IEC-EP-AP-Cu may be used; if there is no risk of confusion, the type designation may be abbreviated to read IEC-61 249-2-1 2-FV1 .
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61 249. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 61 249 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 61 1 89-2:1 997, Test methods for electrical materials, interconnection structures andmassemblies – Part 2: Test methods for materials for interconnection structures
IEC 61 249-5-1 :1 995, Materials for printed boards and other interconnecting structures –
Part 5: Sectional specification set for conductive foils and films with or without coatings –
Section 1 : Copper foils (for the manufacture of copper-clad base materials)
3 Materials and construction
The material consists of an insulating base with metal foil bonded to one side or both.
3.1 Insulating base
Epoxide resin bonded non-woven aramid laminate. Its flame resistance is defined in terms of
the flammability requirements of 7.3.
3.2 Metal foil
Copper as specified in IEC 61249-5-1 . The preferred foils are type E1 (standard electro-
deposited copper) of standard ductility.
4 Internal marking
Not specified.
6.3 Thickness Including copper foil If the copper-clad laminate is tested in accordance with test method 2D01 of IEC 611 89-2, the thickness, including the copper foil, shall not depart from the nominal thickness by more than the appropriate value shown in table 3. The coarse tolerances shall apply unless the fine tolerances are ordered. Excluding copper foil If the base material is tested in accordance with test method 2D01 of IEC 61 189-2, the thickness, excluding the copper foil, shall not depart from the nominal thickness by more than the appropriate value shown in table 3. The coarse tolerances shall apply unless the fine tolerances are ordered.
8 Packaging and marking
Sheets or panels shall be adequately packed to avoid damage, bow and contamination in transit and storage, for example with interleaving packing material. The laminate package shall bear a marking (label or other suitable means) including the material type designation as in this specification, the manufacturer’s name, the nominal material thickness, the nominal thickness of the copper cladding on each side and the batch reference number. Marking on sheets or panels, when specified, shall remain legible during normal handling, but shall be easily removable. The package marking shall also show the number of sheets or panels. By agreement between purchaser and supplier, a reference to the order number may be sub- stituted for material type designation and batch reference number, and weight may be substituted for number of sheets or panels.
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