IEC 61249-2-34:2009

Materials for printed boards and other interconnecting structures - Part 2-34: Reinforced base materials, clad and unclad - Non-halogenated modified or unmodified resin system, woven E-glass laminate sheets of defined relative permittivity (equal to or less than 3,7 at 1 GHz) and flammability (vertical burning test), copper-clad

IEC 61249-2-34:2009 specifies requirements for properties of non-halogenated epoxide woven E-glass laminate 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 150 °C minimum. The relative permittivity is equal to or less than 3,7 and the dissipation factor is equal to or less than 0,0070 at 1 GHz.

Matériaux pour circuits imprimés et autres structures d'interconnexion - Partie 2-34: Matériaux de base renforcés, plaqués et non plaqués - Feuilles stratifiées en tissu de verre de type E, en résine isolante non halogénée modifiée ou non, de permittivité relative (inférieure ou égale à 3,7 à 1 GHz) et d'inflammabilité définies (essai de combustion verticale), plaquées cuivre

La CEI 61249-2-34:2009 spécifie des exigences concernant les propriétés des feuilles stratifiées en tissu de verre de type E époxyde non halogéné, plaquées cuivre, d'inflammabilité définie (essai de combustion verticale) et ayant une épaisseur comprise entre 0,05 mm et 3,2 mm. La température de transition vitreuse est définie à 150 °C minimum. La permittivité relative est inférieure ou égale à 3,7 et le facteur de dissipation est inférieur ou égal à 0,0070 à 1 GHz.

General Information

• Status: Published
• Publication Date: 10-Feb-2009
• ICS: 31.180 - Printed circuits and boards
• Technical Committee: TC 91 - Electronics assembly technology
• Drafting Committee: WG 4 - TC 91/WG 4
• Current Stage: PPUB - Publication issued
• Start Date: 11-Feb-2009
• Completion Date: 28-Feb-2009

Standards Content (Sample)

IEC 61249-2-34 ®
Edition 1.0 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Materials for printed boards and other interconnecting structures –
Part 2-34: Reinforced base materials, clad and unclad – Non-halogenated
modified or unmodified resin system, woven E-glass laminate sheets of defined
relative permittivity (equal to or less than 3,7 at 1 GHz) and flammability (vertical
burning test), copper-clad
Matériaux pour circuits imprimés et autres structures d'interconnexion –
Partie 2-34: Matériaux de base renforcés, plaqués et non plaqués –
Feuilles stratifiées en tissu de verre de type E, en résine isolante non halogénée
modifiée ou non, de permittivité relative (inférieure ou égale à 3,7 à 1 GHz) et
d'inflammabilité définies (essai de combustion verticale), plaquées cuivre
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IEC 61249-2-34 ®
Edition 1.0 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Materials for printed boards and other interconnecting structures –
Part 2-34: Reinforced base materials, clad and unclad – Non-halogenated
modified or unmodified resin system, woven E-glass laminate sheets of defined
relative permittivity (equal to or less than 3,7 at 1 GHz) and flammability (vertical
burning test), copper-clad
Matériaux pour circuits imprimés et autres structures d'interconnexion –
Partie 2-34: Matériaux de base renforcés, plaqués et non plaqués –
Feuilles stratifiées en tissu de verre de type E, en résine isolante non halogénée
modifiée ou non, de permittivité relative (inférieure ou égale à 3,7 à 1 GHz) et
d'inflammabilité définies (essai de combustion verticale), plaquées cuivre

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
S
CODE PRIX
ICS 31.180 ISBN 978-2-88910-456-7
– 2 – 61249-2-34 © IEC:2009
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references.6
3 Materials and construction .6
3.1 Resin system.6
3.2 Metal foil .7
3.3 Reinforcement .7
4 Internal marking.7
5 Electrical properties .7
6 Non-electrical properties of the copper-clad laminate .8
6.1 Appearance of the copper-clad sheet .8
6.1.1 Indentations (pits and dents) .8
6.1.2 Wrinkles .8
6.1.3 Scratches .8
6.1.4 Raised areas .9
6.1.5 Surface waviness.9
6.2 Appearance of the unclad face.9
6.3 Laminate thickness.9
6.4 Bow and twist .10
6.5 Properties related to the copper foil bond.10
6.6 Punching and machining.11
6.7 Dimensional stability.11
6.8 Sheet sizes.11
6.8.1 Typical sheet sizes .11
6.8.2 Tolerances for sheet sizes .11
6.9 Cut panels .12
6.9.1 Cut panel sizes .12
6.9.2 Size tolerances for cut panels .12
6.9.3 Rectangularity of cut panels .12
7 Non-electrical properties of the base material after complete removal of the copper
foil.12
7.1 Appearance of the dielectric base material.12
7.2 Flexural strength.13
7.3 Flammability .13
7.4 Water absorption .13
7.5 Measling.14
7.6 Glass transition temperature and cure factor.14
8 Quality assurance .14
8.1 Quality system .14
8.2 Responsibility for inspection.15
8.3 Qualification inspection.15
8.4 Quality conformance inspection .15
8.5 Certificate of conformance.15
8.6 Safety data sheet.15
9 Packaging and marking/labelling.15
10 Ordering information .16

61249-2-34 © IEC:2009 – 3 –
Annex A (informative) Engineering information .17
Annex B (informative) Common laminate constructions.19
Annex C (informative) Guideline for qualification and conformance inspection.20
Bibliography .21

Table 1 – Electrical properties .7
Table 2 – Nominal thickness and tolerance of metal-clad laminate.9
Table 3 – Bow and twist .10
Table 4 – Pull-off and peel strength .10
Table 5 – Dimensional stability .11
Table 6 – Size tolerances for cut panel.12
Table 7 – Rectangularity of cut panel.12
Table 8 – Flexural strength.13
Table 9 – Flammability .13
Table 10 – Water absorption .14
Table 11 – Measling.14
Table 12 – Glass transition temperature and cure factor .14

– 4 – 61249-2-34 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
MATERIALS FOR PRINTED BOARDS AND
OTHER INTERCONNECTING STRUCTURES –

Part 2-34: Reinforced base materials, clad and unclad –
Non-halogenated modified or unmodified resin system, woven E-glass
laminate sheets of defined relative permittivity (equal to or less than 3,7 at
1 GHz) and flammability (vertical burning test), copper-clad

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61249-2-34 has been prepared by IEC technical committee 91:
Electronics assembly technology.
The text of this standard is based on the following documents:
FDIS Report on voting
91/830/FDIS 91/845/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

61249-2-34 © IEC:2009 – 5 –
The list of all the parts of the IEC 61249 series, under the general title Materials for printed
boards and other interconnecting structures, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – 61249-2-34 © IEC:2009
MATERIALS FOR PRINTED BOARDS AND
OTHER INTERCONNECTING STRUCTURES –

Part 2-34: Reinforced base materials, clad and unclad –
Non-halogenated modified or unmodified resin system, woven E-glass
laminate sheets of defined relative permittivity (equal to or less than 3,7 at
1 GHz) and flammability (vertical burning test), copper-clad

1 Scope
This part of IEC 61249 specifies requirements for properties of non-halogenated epoxide
woven E-glass laminate 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 150 C
minimum. The relative permittivity is equal to or less than 3,7 and the dissipation factor is equal
to or less than 0,007 0 at 1 GHz.
Some property requirements may have several classes of performance. The class desired
should be specified in the purchase order, otherwise the default class of material will be
supplied.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 61189-2:2006, Test methods for electrical materials, interconnection structures and
assemblies – Part 2: Test method for interconnection structures
IEC 61249-5-1:1995, Materials for interconnection 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)
ISO 9000, Quality management systems – Fundamentals and vocabulary
ISO 11014-1, Safety data sheet for chemical products – Part 1: Content and order of sections
ISO 14001, Environmental management standards – Requirements with guidance for use
3 Materials and construction
The sheet consists of an insulating base with metal-foil bonded to one side or both.
3.1 Resin system
The resin system is modified multifunctional epoxide, or modified epoxide, with a glass
transition temperature of the laminate sheet at 150 °C minimum. The flammability rating is
achieved through the use of non-halogenated flame retardants. Inorganic fillers may be used.
The maximum total halogens contained in the resin plus reinforcement matrix is 1 500 ppm
with a maximum chlorine of 900 ppm and maximum bromine being 900 ppm.

61249-2-34 © IEC:2009 – 7 –
Contrast agents may be added to assist processing such as automated optical inspection (AOI).
Resin system should be modified to satisfy the electrical properties requirement of Clause 5.
The flame resistance of the material is defined in terms of the flammability requirements of 7.3.
3.2 Metal foil
The metal foil is made of copper as specified in IEC 61249-5-1, copper foil (for the
manufacture of copper-clad materials). The preferred foils are electro-deposited copper of
defined ductility.
3.3 Reinforcement
The reinforcement of the laminate shall be woven E-glass fabric (for the manufacture of
prepreg and copper clad materials). A woven E-glass fabric exhibiting lower relative permittivity
may be utilized.
4 Internal marking
Not specified.
5 Electrical properties
The electrical property requirements are given in Table 1.
Table 1 – Electrical properties
Test method
Property Requirement
IEC 61189-2
Resistance of foil 2E12 As specified in IEC 61249-5-1
Surface resistance after damp heat 2E03
≥10 000 MΩ
while in the humidity chamber
(optional)
Surface resistance after damp heat 2E03
≥50 000 MΩ
and recovery
Volume resistivity after damp heat 2E04
≥5 000 MΩm
while in the humidity chamber
(optional)
Volume resistivity after damp heat and 2E04
≥10 000 MΩm
recovery
Relative permittivity after damp heat 2E10 ≤4,0
and recovery (1 MHz)
Dissipation factor after damp heat and 2E10 ≤0,005 0
recovery (1 MHz)
Relative permittivity at high frequency 2E10
≤3,7
(1 GHz)
Dissipation factor at high frequency 2E10
≤ 0,007 0
(1 GHz)
Electric strength (only for material 2E11
≥30 kV/mm
thickness less than 0,5 mm)
Arc resistance 2E14 ≥60 s
– 8 – 61249-2-34 © IEC:2009
Test method
Property Requirement
IEC 61189-2
Dielectric breakdown (only for material 2E15
≥40 kV
thicknesses ≥0,5 mm)
Surface resistance at 125 °C 2E07 ≥1 000 MΩ
Volume resistivity at 125 °C 2E07 ≥1 000 MΩm
6 Non electrical properties of the copper-clad laminate
6.1 Appearance of the copper-clad sheet
The copper-clad face shall be substantially free from defects that may have an impact on the
fitness of the material for use for the intended purpose.
For the following specific defects the requirements given shall apply when inspection is made
in accordance with IEC 61189-2 method 2M18.
6.1.1 Indentations (pits and dents)
The size of an indentation, usually the length, shall be determined and given a point value to be
used as a measure of the quality.
Size
Point value for each indentation
mm
0,13 – 0,25 1
0,26 – 0,50 2
0,51 – 0,75 4
0,76 – 1,00 7
Over 1,00 30
The total point count for any 300 mm × 300 mm area laminate shall be calculated to determine
the class of the material.
Class A 29 maximum
Class B 17 maximum
Class C  5 maximum
Class D  0
Class X  To be agreed upon by user and supplier.
The required class of material shall be specified in the purchase order. Class A applies unless
otherwise specified.
6.1.2 Wrinkles
There shall be no wrinkles in the copper surface.
6.1.3 Scratches
Scratches deeper than 20 % of the nominal thickness of the foil thickness are not allowed.
Scratches with a depth less than 5 % of the nominal thickness of the foil shall not be counted
unless this depth is 10 μm or more.

61249-2-34 © IEC:2009 – 9 –
Scratches with a depth between 5 % and 20 % of the nominal thickness of the foil are
permitted to a total length of 100 mm for a 300 mm × 300 mm area.
6.1.4 Raised areas
Raised areas are usually impressions in the press plates used during manufacture but may
also be caused by blisters or inclusions of foreign particles under the foil.
Raised areas caused by blisters or inclusions are not allowed.
Raised areas being impressions of defects in press plates are permitted to the following extent:
Class A and X material Maximum height of 15 μm and maximum length of 15 mm;
Class B and C material Maximum height of 8 μm and maximum length of 15 mm;
Class D material Maximum height of 5 μm and maximum length of 15 mm.
6.1.5 Surface waviness
When examined in accordance with test method 2M12 of IEC 61189-2, the surface waviness in
both the machine and cross machine direction shall not exceed 7 μm.
6.2 Appearance of the unclad face
The unclad face of single side clad sheet shall have the natural appearance resulting from the
curing process. Small irregularities in colour are allowed. The gloss of the unclad face shall be
that given by the press plate or release foil used. Variations of gloss due to the impact of
pressure of gases released during the curing are allowed.
6.3 Laminate thickness
The laminate thickness may be ordered to include or exclude the copper foil contribution as
specified in the purchase order. As a general rule, laminates less than 0,8 mm are measured
excluding copper and laminates greater or equal to 0,8 mm are measured including copper. If
the copper-clad laminate is tested in accordance with test method 2D01 of IEC 61189-2, the
thickness shall not depart from the nominal thickness by more than the appropriate value given
in Table 2. The fine tolerances shall apply unless another tolerance is ordered.
Table 2 – Nominal thickness and tolerance of metal-clad laminate
Nominal thickness excluding metal Nominal thickness including metal Tolerance requirement
foil (material intended for foil (material intended for single or
± mm
multilayer boards) double sided boards) l
Coarse Fine Extra fine
mm mm
>0,05 ≤0,10 0,03 0,02 0,01
0,04 0,03 0,02
>0,10 ≤0,15
0,05 0,04 0,03
>0,15 ≤0,30
0,08 0,05 0,04
>0,30 ≤0,50
0,09 0,06 0,05
>0,50 ≤0,80
0,13 0,09 0,07
≥0,80 ≤1,00
>0,80 ≤1,00
0,17 0,11 0,08
>1,00 ≤1,30
>1,00 ≤1,30
0,20 0,13 0,10
>1,30 ≤1,70
0,23 0,15 0,12
>1,70 ≤2,10
0,25 0,18 0,15
>2,10 ≤2,60
0,30 0,20 0,15
>2,60 ≤3,20
– 10 – 61249-2-34 © IEC:2009
The thickness and tolerances are not applicable to the outer 25 mm of the trimmed master
sheet or the outer 13 mm of the cut-to-size panel as manufactured and delivered by the
supplier. At no point shall the thickness vary from the nominal by a value greater than 125 % of
the specified tolerance.
6.4 Bow and twist
When the copper-clad laminate is tested in accordance with test method 2M01 of IEC 61189-2,
the bow and twist shall not exceed the values given in Table 3.
Table 3 – Bow and twist
Requirement
Nominal Panel dimension
%
Test method
Property thickness longest side
IEC 61189-2
Copper foil on Copper foil on
mm mm
one side both sides
Bow and 2M01
≥0,8 ≤1,3 ≤350 ≤2,0 ≤1,5
twist
>50 ≤500 ≤1,8 ≤1,3
>500 ≤1,5 ≤1,0
>1,3 <1,7 ≤350 ≤1,5 ≤1,0
>350 ≤500 ≤1,3 ≤0,8
>500 ≤1,0 ≤0,5
≥1,7 ≤3,2 ≤350 ≤1,0 ≤0,5
>350 ≤500 ≤0,8 ≤0,4
>500 ≤0,5 ≤0,3
NOTE The requirements for bow and twist apply only to one sided copper-clad laminates with maximum foil
thickness of 105 μm (915 g/m ) and double sided copper-clad laminates with maximum foil thickness difference of
70 μm (610 g/m ).
Requirements for laminates with copper foil configurations beyond these limits are subject to agreement between
purchaser and supplier.
6.5 Properties related to the copper foil bond
Pull-off and peel strength requirements are given in Table 4. These requirements apply to
copper foil with a normal profile depth. In the case of low or very low profile copper foil, the
requirements shall be at least 50 % of that given in Table 4 as a minimum.
Table 4 – Pull-off and peel strength requirements
Test method
Property Requirement
IEC 61189-2
Thickness of the copper foil
≤12 μm 18 μm 35 μm ≥70 μm
2 2 2 2
(≤101 g/m ) (152 g/m ) (305 g/m ) (≥610 g/m )
Peel strength as received 2M14
≥0,50 N/mm ≥0,60 N/mm ≥0,70 N/mm ≥0,80 N/mm
No blistering nor delamination
Peel strength after 2M14
≥0,50 N/mm ≥0,60 N/mm ≥0,70 N/mm ≥0,80 N/mm
heat shock of 20 s
No blistering nor delamination
Blistering after 20 s 2C05 No blistering nor delamination
heat shock
NOTE In case of difficulty due to breakage of the foil or reading range of the force measuring device, the measurement of
peel strength at high temperature may be carried out using conductor widths of more than 3 mm.

61249-2-34 © IEC:2009 – 11 –
6.6 Punching and machining
Punching is not applicable. The laminate shall, in accordance with the manufacturer’s
recommendations, be capable of being sheared or drilled. Delamination at the edges due to the
shearing process is permissible provided that the depth of delamination is not larger than the
thickness of the base material. Delamination at the edges of drilled holes due to the drilling
process is not permissible. Drilled holes shall be capable of being through-plated with no
interference from any exudations into the hole.
6.7 Dimensional stability
The dimensional stability requirements are given in Table 5. When specimens are tested in
accordance with IEC 61189-2 2X02 the observed tolerance shall be as specified in Table 5.
The nominal dimensional stability value shall be as agreed upon between user and supplier.
The tolerance range agreed upon between user and supplier shall be class A unless otherwise
specified on the purchase order.
The choice of the glass fabrics in the construction of the laminate has a significant impact on
dimensional stability. Examples of typical constructions used in printed board applications can
be found in Annex B.
Class A performance shall be in effect unless othewise noted on the purchase order.
Table 5 – Dimensional stability
Test method
Requirement
Property Class
IEC 61189-2 ppm
Dimensional stability 2X02 A
±500
B
±300
C ±100
X As agreed upon between
user and supplier
6.8 Sheet sizes
6.8.1 Typical sheet sizes
Sheet size is a subject of agreement between user and supplier. However, the recommended
sizes are listed below:
–  915 mm × 1 220 mm
– 1 065 mm × 1 155 mm
– 1 065 mm × 1 280 mm
– 1 000 mm × 1 000 mm
– 1 000 mm × 1 200 mm
6.8.2 Tolerances for sheet sizes
+20
The size of sheet delivered by the supplier shall not deviate more that mm from the ordered
size.
– 12 – 61249-2-34 © IEC:2009
6.9 Cut panels
6.9.1 Cut panel sizes
Cut panel sizes shall be, when delivered, in accordance with the purchaser’s specification
given by the purchaser.
6.9.2 Size tolerances for cut panels
For panels cut-to-size according to the purchaser’s specification, the following tolerances for
length and width shall apply as given in Table 6. Tolerances indicated as normal shall be in
effect unless otherwise specified by in the specification given by the purchaser.
Table 6 – Size tolerances for cut panel
Tolerance requirement
Panel size
± mm
mm
Normal Close
2,0 0,5
≤300
>300 ≤600 2,0 0,8
>600 2,0 1,6
NOTE The specified tolerances include all deviations caused by cutting the panels.
6.9.3 Rectangularity of cut panels
For panels cut-to-size according to the specification given by the purchaser, the following
requirements for rectangularity shall apply as given in Table 7. Tolerance indicated as normal
shall be in effect unless otherwise specified in the purchasing specification.
Table 7 – Rectangularity of cut panel
Requirement
Test method
mm/m
Property
IEC 61189-2
Normal Close
Rectangularity of cut panels 2M23 ≤3 ≤2
7 Non-electrical properties of the base material after complete removal of the
copper foil
7.1 Appearance of the dielectric base material
An etched specimen shall be inspected to verify that no surface or subsurface imperfections of
the dielectric material exceed those given below. The panels shall be inspected using an
optical aid apparatus which provides a minimum magnification of 4X.
Referee inspection shall be conducted at 10X magnification. Lighting conditions of inspection
shall be appropriate to the material under inspection or as agreed upon between user and
supplier.
Surface and subsurface imperfections (such as weave texture, resin starvation, voids, foreign
inclusions) shall be acceptable provided that the imperfections meet the following:
• the reinforcement fibres are not cut or exposed;
• the foreign inclusions are not conductive;
• the imperfections do not propagate as a result of thermal stress;
• the foreign inclusions are translucent;

61249-2-34 © IEC:2009 – 13 –
• opaque foreign fibres are less than 15 mm in length and an average number of no more
than 1,0 per 300 mm × 300 mm area;
• opaque foreign inclusions other than fibres shall not exceed 0,50 mm. opaque foreign
inclusions less than 0,15 mm shall not be counted. the number of opaque foreign inclusions
between 0,50 mm and 0,15 mm shall be average no more than two spots per
300 mm × 300 mm area;
• voids (sealed voids or surface void) have a longest dimension less than 0,075 mm and
there should not be more than three voids in a 3.5 mm diameter circle.
7.2 Flexural strength
When the laminate is tested in accordance with test method 2M20 of IEC 61189-2 the flexural
strength shall be as given in Table 8.
Table 8 – Flexural strength
Test method
Property Requirement
IEC 61189-2
Flexural strength 2M20
Length direction
≥250 N/mm
Cross direction (applicable to sheets ≥1,0 mm in Not specified
thickness)
Flexural strength
Length direction Not specified
Elevated temperature (applicable to sheets ≥1,0 mm
in thickness)
7.3 Flammability
When the laminate is tested in accordance with the test method 2C08 (thickness ≥0,05 mm
≤0,3 mm) or 2C06 (thickness >0,3 mm ≤3,2 mm) of IEC 61189-2 the flammability shall be as
given in Table 9.
The performance class of V-0 shall be in effect unless otherwise stated in the purchase order.
Table 9 – Flammability
Test method
Property Requirement
IEC 61189-2
Flammability 2C06 Designation
V-0 V-1
Flaming combustion time after each application of the
≤10 s ≤30 s
flame for each test specimen
Total flaming combustion time for the 10 flame
≤50 s ≤250 s
applications for each set of five specimens

Glowing combustion time after the second removal of ≤30 s ≤60 s
the test flame
Flaming or glowing combustion up to the holding clamp
None None
Dripping flaming particles that ignite the tissue paper None None

7.4 Water absorption
When the laminate is tested in accordance with test method 2N02 of IEC 61189-2, the
maximum water absorption shall be as given in Table 10.

– 14 – 61249-2-34 © IEC:2009
Table 10 – Water absorption
Test method Thickness Requirement
Property
IEC 61189-2 mm %
Water absorption 2N02 ≥0,05 <0,20 <2,00
≥0,20 <0,30 <1,50
≥0,30 <0,40 <1,20
≥0,40 <0,50 <1,00
≥0,50 <0,60 <0,80
≥0,60 <0,80 <0,70
≥0,80 <1,00 <0,50
≥1,00 <1,20 <0,50
≥1,20 <1,60 <0,40
≥1,60 <2,00 <0,25
≥2,00 <2,40 <0,20
≥2,40 <3,20 <0,20
7.5 Measling
When the laminate is tested in accordance with test method 2N01 of IEC 61189-2, the
presence of measles allowed shall be as given in Table 11.
Table 11 – Measling
Test method
Property Requirement
IEC 61189-2
Measling 2N01 No measling on three specimens. If one
out of three specimens fails, the test
has to be repeated.
No measling on three specimens of the
second test is permitted.
No blistering or delamination on any of
the three specimens is permitted

7.6 Glass transition temperature and cure factor
The requirements for glass transition temperature and cure factor are found in Table 12.
Table 12 – Glass transition temperature and cure factor requirements
Test method
Property Requirement
IEC 61189-2
Glass transition temperature 2M10 (DSC) or 2M11 (TMA) ≥150 °C
2M28 (DMA)
≥170 °C
Cure factor 2M03 Not specified

8 Quality assurance
8.1 Quality system
The supplier shall maintain a quality system in compliance with ISO 9000 or similar to support
quality conformance inspection.

61249-2-34 © IEC:2009 – 15 –
The supplier shall maintain a management system for environmental control in compliance with
ISO 14001 or similar, to support environmental considerations.
8.2 Responsibility for inspection
The supplier is responsible for all inspections of the manufactured material. The purchaser or
an appointed third party may audit these inspections.
8.3 Qualification inspection
Laminates furnished under this standard shall be qualified. Qualification testing shall be
performed to demonstrate the manufacturer’s ability to meet the requirements of this
specification sheet. Qualification testing shall be conducted at a laboratory in compliance with
IEC laboratory requirements. A list of the normal qualification tests can be found in Annex C.
The manufacturer shall retain on file the data which supports that the materials meet this
standard and shall be readily available for review upon request.
8.4 Quality conformance inspection
The supplier shall operate a quality plan to assure product conformance to this standard. Such
a quality plan, when appropriate, should utilize statistical methods rather than lot-by-lot
inspection. It is the responsibility of the supplier, based on the quality plan, to determine the
frequency of test to assure conforming products. In the absence of a quality plan or supporting
data, the testing regime shall be as outlined in Annex C.
A combination of the following techniques may be used to show compliance with the
requirements which can be used to reduce the frequency of testing. The data supporting the
reduction of testing frequency shall be available for review upon request.
• In process parameter control
• In process inspection
• Periodic final inspection
• Final lot inspection
8.5 Certificate of conformance
The supplier shall issue a certificate on request from the purchaser of conformance to this
standard in electronic or paper format.
8.6 Safety data sheet
A safety data sheet in accordance with ISO 11014-1 shall be available for products
manufactured and delivered in compliance with this standard.
9 Packaging and marking/labelling
If not otherwise specified in the purchase order, laminate sheets shall be marked with the
manufacturer's designation and lot number. Marking shall remain legible during normal
handling but be readily removable prior to use of the material.
Cut-to-size panels shall be identified by marking/labelling on the package.
Laminates comprised of asymmetric copper configurations shall be marked on the side of the
heaviest copper weight.
Sheets and panels shall be packaged in a manner which will provide adequate protection
against corrosion, deterioration and physical damages during shipment and storage.

– 16 – 61249-2-34 © IEC:2009
The package shall be marked in a manner to clearly identify the content.
10 Ordering information
Order shall include the following details:
a) A reference to this standard;
b) Type of material (see scope and 7.3);
c) Size, thickness and copper cladding;
d) Class of indentation if other than “a” (see 6.1.1);
e) Class of raised area if other than “a” (see 6.1.4);
f) Class of thickness tolerance if other than “fine” (see 6.3);
g) Class of dimensional stability if other than “a” (see 6.7);
h) Class of panel size tolerance if other than “normal” (see 6.9.2);
i) Class of flammability if other than v-0 (see 7.3);
j) Request for certification if applicable (see 8.5).

61249-2-34 © IEC:2009 – 17 –
Annex A
(informative)
Engineering information
A.1 General
Information in this annex does not detail material property requirements. The information is
intended as a guideline for design and engineering purposes. Users of this standard are
encouraged to supply information to be included in the annex.
Materials according to this standard show the properties and data as listed in Clause A.2 to
Clause A.7.
A.2 Chemical properties
• Resistance against chemicals
A.3 Electrical properties
• Comparative tracking index (175 –250) V
A.4 Flammability properties
• Needle flame test
• Oxygen index 45 %
A.5 Mechanical properties
• Compressive strength (flatwise) 400 N/mm
• Compressive strength (edgewise) 240 N/mm
• Hardness at room temperature 200 (Rockwell M)
• Modulus of elasticity, flexural (warp) 1,9 × 104 N/mm
• Modulus of elasticity, flexural (weft) 1,5 × 104 N/mm
• Modulus of elasticity, tensile (warp) 1,7 × 104 N/mm
• Modulus of elasticity, tensile (weft) 1,4 × 104 N/mm
• Poisson’s ratio 0,12-0,16
• Shear strength 148 N/mm
• Young’s modulus 22 GPa
– 18 – 61249-2-34 © IEC:2009
A.6 Physical properties
• Density 1,85 g/cm
A.7 Thermal properties
• Coefficient of thermal expansion ( • Coefficient of thermal expansion ( • Specific heat capacity 1,25 kJ/(kg °C)
• Thermal conductivity 0,3 W/(m °C)
• UL temperature index (mechanical) 130 °C
• UL temperature index (electrical) 130 °C
• Maximum operating temperature (MOT) 130 °C

61249-2-34 © IEC:2009 – 19 –
Annex B
(informative)
Common laminate constructions
Nominal thickness
Common construction
mm
0,075 1 080
0,080
2 × 106
0,100 2 × 106
0,100 2 113
0,100 2 116
0,125 2 116
0,125 2 165
0,125 2 × 1 080
0,15 2 157
0,15 2 165
0,16 1 500
0,18 7 628
0,18 1 500
0,20
2 × 2 113
0,20
2 × 2 116
0,20 7 628
0,25
2 × 2 116
0,25 2 × 2 165
0,26 1 080/2 116/1 080
0,30
2 × 2 157
0,30 2 × 2 165
0,30 2 116/2 112/2 116
0,30 1 080/7 628/1 080
0,36 2 × 7 628
0,37 2 113/7 628/2 113
0,38 1 500/1 080/1 500
0,41 7 628/1 080/7 628
0,43 2 116/7 628/2 116
0,45 3 × 1 500
0,46 7 628/2 112/7 628
0,48 7 628/2 116/7 628
0,51 7 628/2 165/7 628
0,51
1 080/2 × 7 628/1 080
0,54
3 × 7 628
0,61
3 × 7 628/1 080
0,61
2 116/2 × 7 628/2 116
0,66 7 628/2 × 2 165/7 628
0,67
7 628/2 × 1 500/7 628
0,74 4 × 7 628
0,74
2 113/3 × 7 628/2 113
0,80 4 × 7 628/1 080
0,90
5 × 7 628
1,08 6 × 7 628
1,46
8 × 7 628
NOTE Prepreg made from a specific style of glass used in different constructions may have
different resin contents.
– 20 – 61249-2-34 © IEC:2009
Annex C
(informative)
Guideline for qualification and conformance inspection

Property Test method Qualification Conformance Conformance
IEC-61189-2 testing testing frequency
Peel strength after thermal shock 2M14 Yes Yes Lot
Peel strength at 125 °C 2M15 Yes Yes Quarterly
Peel strength after solvent vapour 2M06 Yes Yes Quarterly
Peel strength after simulated plating 2M16 Yes No
Pull off strength 2M05 Yes No
Dimensional stability 2X02 Yes Yes Monthly
Flexural strength 2M20 Yes Yes Annually
Flammability 2C06 Yes Yes Monthly
Thermal stress, unetched 2C05 Yes Yes Lot
Solderability 2MXX Yes No
Glass transition temperature 2M10 Yes Yes Monthly
2M11
Cure factor 2M03 Yes Yes Monthly
Permittivity at 1 MHz, as received 2E10 Yes Yes Monthly
Dissipation fact
...