IEC 61249-2-13:1999 pdf download

IEC 61249-2-13:1999 pdf download.Materials for printed boards and other interconnecting structures
1 Scope
This part of IEC 61 249 gives requirements for properties of cyanate ester 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 3-FV1 0-IEC-CE-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 3-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 amend- ments 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 and assemblies – Part 2: Test methods for materials for interconnection structures IEC 61 249-5-1 :1 995, Materials for printed boards and 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
Cyanate ester 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 61 249-5-1 . The preferred foils are type E1 (standard electro-
deposited copper) of standard ductility.
4 Internal marking
Not specified.
The total length of scratches of depth greater than 5 µm but not more than 1 0 µm shall not exceed 1 m per square metre of the total area of the sheet under test. This requirement applies to the surface of 35 µm and 70 µm (305 g/m 2 and 61 0 g/m 2 ) foils. Permitted scratches on surfaces of 1 8 µm (1 52 g/m 2 ) foil are still under consideration. The total area of all pin-holes in an area of 0,5 m 2 shall not exceed 0,01 2 mm 2 . No sheet shall have more imperfections of the types listed than those permitted by table 2.
6.1.3 Surface waviness (optional)
Under consideration.
6.2 Appearance of the unclad face
The unclad face of laminate, copper-clad on one side only, shall be free from all materials, for
example release agents, oils or lubricants, that might interfere with its adhesion in the
multilayer fabrication operation.
6.3 Thickness Including copper foil
If the copper-clad laminate is tested in accordance with test method 2D01 of IEC 61 1 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 1 89-2 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.