SIST EN 61249-4-12:2006
(Main)Materials for printed boards and other interconnecting structures -- Part 4-12: Sectional specification set for prepreg materials, unclad - Non-halogenated multifunctional epoxide woven E-glass prepreg of defined flammability
- Abstract
This part of EN 61249 gives requirements for properties of prepreg that is mainly intended to be used as bonding sheets in connection with laminates according EN 61249-2-7 when manufacturing multilayer boards in conformity with EN 62326-4. This material may be also used to bond other types of laminates. Prepreg according to this standard is of defined flammability (vertical burning test). The flammability rating on fully cured prepreg is achieved through the use of brominated fire retardants contained as an integral part of the polymeric structure. After lamination according to the supplier's instructions, the glass transition temperature is defined to be 150 °C minimum.
- Status
- Published
- Publication Date
- 31-Jan-2006
- Technical Committee
- ITIV - Electronics assembly technology and Environmental standardization
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Feb-2006
- Due Date
- 01-Feb-2006
- Completion Date
- 01-Feb-2006
SIST EN 61249-4-12:2006 is the Slovenian adoption of EN 61249-4-12, published by SIST. It specifies requirements for non-halogenated multifunctional epoxide woven E-glass prepreg of defined flammability for printed boards and other interconnecting structures. In practice, it is mainly used as a bonding sheet with laminates for multilayer boards, and it also covers use with other laminate types.
What does SIST EN 61249-4-12:2006 specify?
SIST EN 61249-4-12:2006 sets requirements for the material, its properties before and after curing, delivery forms, quality assurance, packaging, shelf life, and ordering information. The standard is organized into clauses 1 to 9, plus Annex ZA and a bibliography.
| Annex | What it covers |
|---|---|
| ZA | Normative references to international publications with their corresponding European publications |
The scope is focused on prepreg intended for bonding in multilayer board manufacture to the referenced laminate and board specifications. It also states that the material is of defined flammability by the vertical burning test, and it ties the cured material to a minimum glass transition temperature after lamination according to the supplier’s instructions.
What are the key requirements of SIST EN 61249-4-12:2006?
SIST EN 61249-4-12:2006 is a requirement set for a specific prepreg construction, with test methods for appearance, B-stage properties, cured properties, delivery condition, and quality control. The practical point is that buyers and suppliers must agree on certain order parameters, while the standard fixes the key performance limits and test approach.
Material and construction
Clause 3 defines the prepreg as woven E-glass fabric impregnated with epoxide resin and partially cured to the B-stage. It also states that the resin system is mainly non-halogenated multifunctional epoxide resin and that the flammability performance is part of the material definition.
Appearance and workmanship
Clause 4.1 covers visual quality such as dewetted areas, broken filaments, distortion, creases, and edge conditions. This matters because surface defects, fiber distortion, or resin loss can affect lamination quality and final board reliability.
B-stage properties
Clause 4.2 treats B-stage properties as selectable order parameters such as resin content, treated weight, resin flow, scaled flow thickness, melt viscosity, cured thickness, volatile content, and gel time. The standard expects user and supplier to agree which characteristics are used for qualification and conformance, so the order document must name the chosen parameters clearly.
C-stage properties after curing
Clause 4.3 covers electrical strength, flammability, relative permittivity, dissipation factor, cured thickness, and glass transition temperature after curing. In practice, these are the properties that matter when the prepreg is part of a finished multilayer board, so the tests are performed on bonded and cured specimens.
Delivery, assurance, and traceability
Clauses 5 to 9 cover rolls, sheets, and cut panels; supplier quality system expectations; inspection responsibility; certificate of conformance; safety data sheet; packaging and marking; shelf life; and ordering information. This gives the buyer a clear basis for receiving, storing, identifying, and documenting the material.
What terms does SIST EN 61249-4-12:2006 define?
Prepreg is an unclad reinforcement material that has been impregnated with resin and partially cured for later lamination.
B-stage prepreg is prepreg in the partially cured condition, where it can still flow and bond during lamination.
C stage prepreg is prepreg after full curing, when the final electrical and thermal properties are measured.
Reinforcement is the woven E-glass fabric that gives the prepreg its structural base.
Resin system is the epoxide resin part of the material that controls bonding, flow, and cured performance.
Flammability in this document refers to the vertical burning test classification of the cured prepreg.
Certificate of conformance is the supplier’s statement that the delivered material meets this standard.
Safety data sheet is the product safety document prepared in the format required by ISO 11014-1.
Who uses SIST EN 61249-4-12:2006?
SIST EN 61249-4-12:2006 is used by prepreg manufacturers, laminate suppliers, multilayer printed board manufacturers, and purchasing or quality teams that specify insulating and bonding materials. It is also used by test laboratories that verify material properties and by auditors who review qualification and conformance records. The standard is relevant to printed boards and other interconnecting structures where defined flammability and controlled cured properties are needed.
What changed in SIST EN 61249-4-12:2006 from the previous edition?
SIST EN 61249-4-12:2006 is based on IEC 61249-4-12:2005 and was approved by CENELEC without modification. CENELEC added Annex ZA.
Which standards are used with SIST EN 61249-4-12:2006?
- IEC 61189-2 - provides the test methods used for material properties and cured properties.
- IEC 61249-2-7 - covers the related reinforced base material for laminated sheet of defined flammability used in multilayer board manufacture.
- IEC 61249-6-3 - provides the sectional specification for woven E-glass reinforcement materials.
- IEC 62326-4 - gives the sectional specification for rigid multilayer printed boards with interlayer connections.
- ISO 9000 - supplies the quality management system vocabulary referenced for supplier quality systems.
- ISO 11014-1 - gives the required content and order for the safety data sheet.
What does the SIST EN 61249-4-12:2006 document contain?
The document contains clause-by-clause requirements for prepreg construction, appearance, B-stage properties, cured electrical and thermal properties, delivery forms, quality assurance, packaging, shelf life, and ordering information. It also includes Table 1 for vertical burning flammability classification and Annex ZA for the linked European references. The procedures and test conditions are aimed at qualification, quality conformance inspection, and supplier-customer agreement on order parameters.
Relations
- Refers
SIST EN ISO 9000:2004 - Quality management systems - Fundamentals and vocabulary (ISO 9000:2000) - Effective Date
- 09-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Referred By
SIST EN 115-1:2017 - Safety of escalators and moving walks - Part 1: Construction and installation - Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
Frequently Asked Questions
SIST EN 61249-4-12:2006 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Materials for printed boards and other interconnecting structures -- Part 4-12: Sectional specification set for prepreg materials, unclad - Non-halogenated multifunctional epoxide woven E-glass prepreg of defined flammability". This standard covers: This part of EN 61249 gives requirements for properties of prepreg that is mainly intended to be used as bonding sheets in connection with laminates according EN 61249-2-7 when manufacturing multilayer boards in conformity with EN 62326-4. This material may be also used to bond other types of laminates. Prepreg according to this standard is of defined flammability (vertical burning test). The flammability rating on fully cured prepreg is achieved through the use of brominated fire retardants contained as an integral part of the polymeric structure. After lamination according to the supplier's instructions, the glass transition temperature is defined to be 150 °C minimum.
This part of EN 61249 gives requirements for properties of prepreg that is mainly intended to be used as bonding sheets in connection with laminates according EN 61249-2-7 when manufacturing multilayer boards in conformity with EN 62326-4. This material may be also used to bond other types of laminates. Prepreg according to this standard is of defined flammability (vertical burning test). The flammability rating on fully cured prepreg is achieved through the use of brominated fire retardants contained as an integral part of the polymeric structure. After lamination according to the supplier's instructions, the glass transition temperature is defined to be 150 °C minimum.
SIST EN 61249-4-12:2006 is classified under the following ICS (International Classification for Standards) categories: 31.180 - Printed circuits and boards. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 61249-4-12:2006 has the following relationships with other standards: It is inter standard links to SIST EN ISO 9000:2004, SIST EN 62326-4:2001, SIST EN 61189-2:2001, SIST EN 61189-2:2002 + A1:2002, SIST EN 61249-2-7:2003, SIST EN 115-1:2017, SIST EN 115-1:2009+A1:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 61249-4-12:2006 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI SIST EN 61249-4-12:2006
STANDARD
februar 2006
Materiali za tiskane plošče in druge povezovalne strukture – 4-12. del:
Skupina področnih specifikacij za prepreg materiale, nepokovinjene –
Prepreg z E-stekleno kovino, impregnirano z večfunkcijskim epoksidom, z
določeno gorljivostjo (IEC 61249-4-12:2005)
Materials for printed boards and other interconnecting structures - Part 4-12:
Sectional specification set for prepreg materials, unclad – Non-halogenated
multifunctional epoxide woven E-glass prepreg of defined flammability (IEC 61249-
4-12:2005)
ICS 31.180 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD EN 61249-4-12
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2005
ICS 31.180
English version
Materials for printed boards and other interconnecting structures
Part 4-12: Sectional specification set for prepreg materials, unclad –
Non-halogenated multifunctional epoxide woven E-glass
prepreg of defined flammability
(IEC 61249-4-12:2005)
Matériaux pour circuits imprimés et autres Materialien für Leiterplatten und andere
structures d'interconnexion Verbindungsstrukturen
Partie 4-12: Série de spécifications Teil 4-12: Rahmenspezifikationen für
intermédiaires pour matériaux unkaschierte Prepreg-Materialien –
préimprégnés, non plaqués – Mit E-Glasgewebe verstärkte Prepregs
Tissu de verre époxyde préimprégné auf der Basis von halogenfreiem
multifonctionnel de type E non halogéné, multifunktionalem Epoxidharz mit
d'inflammabilité définie definierter Brennbarkeit
(CEI 61249-4-12:2005) (IEC 61249-4-12:2005)
This European Standard was approved by CENELEC on 2005-09-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61249-4-12:2005 E
Foreword
The text of document 91/529/FDIS, future edition 1 of IEC 61249-4-12, prepared by IEC TC 91,
Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 61249-4-12 on 2005-09-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61249-4-12:2005 was approved by CENELEC as a
European Standard without any modification.
__________
- 3 - EN 61249-4-12:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 61189-2 1997 Test methods for electrical materials, EN 61189-2 1997
printed boards and other interconnection + corr. August 1997
structures and assemblies
Part 2: Test methods for materials for
interconnection structures
A1 2000 A1 2000
IEC 61249-2-7 2002 Materials for printed boards and other EN 61249-2-7 2002
interconnecting structures + corr. September 2005
Part 2-7: Reinforced base materials, clad
and unclad - Epoxide woven E-glass
laminated sheet of defined flammability
(vertical burning test), copper-clad
1)
IEC 61249-6-3 - Materials for interconnection structures - -
Section 6-3: Sectional specification for
reinforcements - Part 3: Woven fibreglass
fabrics
2) 3)
IEC 62326-4 - Printed boards EN 62326-4 1997
Part 4: Rigid multilayer printed boards
with interlayer connections - Sectional
specification
ISO 9000 2000 Quality management systems - EN ISO 9000 2000
Fundamentals and vocabulary
ISO 11014-1 1994 Safety data sheet for chemical products - -
Part 1: Content and order of sections
1)
In preparation.
2)
Undated reference.
3)
Valid edition at date of issue.
NORME CEI
INTERNATIONALE
IEC
61249-4-12
INTERNATIONAL
Première édition
STANDARD
First edition
2005-09
Matériaux pour circuits imprimés et autres
structures d'interconnexion –
Partie 4-12:
Série de spécifications intermédiaires pour
matériaux préimprégnés, non plaqués –
Tissu de verre époxyde préimprégné
multifonctionnel de type E non halogéné,
d'inflammabilité définie
Materials for printed boards and
other interconnecting structures –
Part 4-12:
Sectional specification set for prepreg materials,
unclad – Non-halogenated multifunctional epoxide
woven E-glass prepreg of defined flammability
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
61249-4-12 IEC:2005 – 3 –
CONTENTS
FOREWORD.5
1 Scope.9
2 Normative references .9
3 Materials and construction.11
3.1 Reinforcement.11
3.2 Resin system.11
4 Properties.11
4.1 Properties related to the appearance of the prepreg .11
4.2 Properties related to B-stage prepreg.13
4.3 Properties related to C stage prepreg after curing .15
5 Delivery form .17
5.1 Rolls.17
5.2 Sheets.19
5.3 Cut panels.19
6 Quality assurance.19
6.1 Quality system.19
6.2 Responsibility for inspection .19
6.3 Qualification inspection .19
6.4 Quality conformance inspection.19
6.5 Certificate of conformance.19
6.6 Safety data sheet .21
7 Packaging and marking .21
8 Shelf life.21
9 Ordering Information .23
Bibliography.25
Table 1 – Flammability.17
61249-4-12 IEC:2005 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
MATERIALS FOR PRINTED BOARDS AND
OTHER INTERCONNECTING STRUCTURES –
Part 4-12: Sectional specification set for prepreg materials, unclad –
Non-halogenated multifunctional epoxide woven E-glass prepreg
of defined flammability
FOREWORD
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International Standard IEC 61249-4-12 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
91/529/FDIS 91/539/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.
61249-4-12 IEC:2005 – 7 –
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 61249-4 consists of the following parts, under the general title Materials for printed boards
and other interconnecting structures – Part 4: Sectional specification set for prepreg materials,
unclad:
Part 4-1: Epoxide woven E-glass prepreg of defined flammability
Part 4-2: Multifunctional epoxide woven E-glass prepreg of defined flammability
Part 4-5: Polyimide, modified or unmodified, woven E-glass prepreg of defined flammability
Part 4-11: Non-halogenated epoxide, woven E-glass prepreg of defined flammability
Part 4-12: Non-halogenated multifunctional epoxide woven E-glass prepreg of defined
flammability
The committee has decided that the contents of this publi
...