1、BRITISH STANDARDBS EN 61249-4-2: 2005Materials for printed boards and other interconnecting structures Part 4-2: Sectional specification set for prepreg materials, unclad Multifunctional epoxide woven E-glass prepreg of defined flammabilityThe European Standard EN 61249-4-2:2005 has the status of a
2、British StandardICS 31.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61249-4-2:2005This British Standard was published under the authorit
3、y of the Standards Policy and Strategy Committee on 1 February 2006 BSI 1 February 2006National forewordThis British Standard is the official English language version of EN 61249-4-2:2005. It is identical with IEC 61249-4-2:2005. The UK participation in its preparation was entrusted to Technical Com
4、mittee EPL/501, Electronic assembly technology, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related internation
5、al and European developments and promulgate them in the UK.A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the B
6、SI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for
7、its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover.The BSI copyright notice displaye
8、d in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsISBN 0 580 47351 1EUROPEAN STANDARD EN 61249-4-2 NORME EUROPENNE EUROPISCHE NORM October 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Norma
9、lisation Electrotechnique Europisches Komitee fr 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 61249-4-2:2005 E ICS 31.180 English version
10、 Materials for printed boards and other interconnecting structures Part 4-2: Sectional specification set for prepreg materials, unclad - Multifunctional epoxide woven E-glass prepreg of defined flammability (IEC 61249-4-2:2005) Matriaux pour circuits imprims et autres structures dinterconnexion Part
11、ie 4-2: Srie de spcifications intermdiaires pour matriaux primprgns, non plaqus Tissu de verre poxyde de type E primprgn multifonctionnel dinflammabilit dfinie (CEI 61249-4-2:2005) Materialien fr Leiterplatten und andere Verbindungsstrukturen Teil 4-2: Rahmenspezifikationen fr unkaschierte Prepreg-M
12、aterialien Mit E-Glasgewebe verstrkte Prepregs auf der Basis von multifunktionalem Epoxidharz mit definierter Brennbarkeit (IEC 61249-4-2:2005) 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
13、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 exi
14、sts 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 elec
15、trotechnical 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. F
16、oreword The text of document 91/526/FDIS, future edition 1 of IEC 61249-4-2, prepared by IEC TC 91, Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61249-4-2 on 2005-09-01. The following dates were fixed: latest date by which the EN h
17、as 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 th
18、e International Standard IEC 61249-4-2:2005 was approved by CENELEC as a European Standard without any modification. _ EN 61249-4-2:2005 2 3 EN 61249-4-2:2005 CONTENTS 1 Scope 4 2 Normative references. 4 3 Materials and construction . 5 3.1 Reinforcement 5 3.2 Resin system 5 4 Properties5 4.1 Proper
19、ties related to the appearance of the prepreg 5 4.2 Properties related to B-stage prepreg 6 4.3 Properties related to prepreg after curing 7 5 Delivery form. 8 5.1 Rolls. 8 5.2 Sheets 9 5.3 Cut panels 9 6 Quality assurance 9 6.1 Quality system 9 6.2 Responsibility for inspection 9 6.3 Qualification
20、inspection. 9 6.4 Quality conformance inspection. 9 6.5 Certificate of conformance 9 6.6 Safety data sheet.10 7 Packaging and marking.10 8 Shelf life.10 9 Ordering information.10 Annex ZA (normative) Normative references to international publications with their Table 1 Flammability. 8 corresponding
21、European publications 12EN 61249-4-2:2005 4 MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES Part 4-2: Sectional specification set for prepreg materials, unclad Multifunctional epoxide woven E-glass prepreg of defined flammability 1 Scope This part of IEC 61249 gives requirements fo
22、r properties of prepreg that is mainly intended to be used as bonding sheets in connection with laminates according to IEC 61249-2-8 when manufacturing multilayer boards according to IEC 62326-4. This material may be also used to bond other types of laminates. Prepreg according to this standard is o
23、f 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 curing of the prepreg according to the suppliers instructions, the glass transition
24、 temperature is defined as 150 C minimum. 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 amend
25、ments) applies. IEC 61189-2:1997, Test methods for electrical materials, printed boards and other inter-connecting structures and assemblies Part 2: Test methods for materials for interconnection structures Amendment 1 (2000) IEC 61249-2-8:2003, Materials for printed boards and other interconnecting
26、 structures Part 2-8: Reinforced base materials, clad and unclad Modified brominated epoxide woven fibreglass reinforced laminated sheets of defined flammability, copper-clad IEC 61249-6-3, Material for interconnection structures Part 6-3: Sectional specification set for reinforcement materials Wove
27、n E-glass (for the manufacture of prepregs and copper-clad base materials 1IEC 62326-4:1996, Printed boards Part 4: Rigid multilayer printed boards with interlayer connections Sectional specification ISO 9000:2000, Quality management systems Fundamentals and vocabulary ISO 11014-1:1994, Safety data
28、sheet for chemical products Part 1: Content and order of sections ISO 14001:2004, Environmental management systems Requirements with guidance for use _ 1In preparation. 5 EN 61249-4-2:2005 3 Materials and construction The prepreg consists of a reinforcing E-glass fabric which is impregnated with epo
29、xide resin and partially cured to the B-stage. 3.1 Reinforcement Woven E-glass as specified in IEC 61249-6-3: Woven E-glass fabric (for the manufacture of prepreg and copper-clad laminate). 3.2 Resin system The resin consists of a majoriity multifunctional epoxide resin with an E-glass transition te
30、mperature of 150 C when cured according the manufacturers recommendation. Contrast agents may be added to enhance processing such as automated optical inspection. Its flame resistance is defined in terms of the flammability requirements of 4.3.2. 4 Properties 4.1 Properties related to the appearance
31、 of the prepreg The prepreg shall be substantially free from defects that may have an impact on the materials fitness 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 2V01 (under con
32、sideration). 4.1.1 Dewetted areas (fish eyes) Dewetted areas with a diameter 10 mm are not permissible. Dewetted areas with a diameter 10 mm are permitted to the extent of a maximum 10 fish eyes in any 300 300 mm area of the prepreg. 4.1.2 Broken filaments When judging the presence of broken filamen
33、ts their sizes and frequency of occurrence are important for assessing acceptability but also the flow characteristic of the prepreg must be taken into consideration. The acceptance conditions for broken filaments shall be as agreed upon between the user and supplier. 4.1.3 Distortion When the prepr
34、eg is tested in accordance with test method 2M29 (under consideration) of IEC 61189-2, the distortion or non-perpendicular orientation of the fill or weft yarns in the glass fabric shall not exceed 10 % measured over any 300 mm test distance. 4.1.4 Creases Creases caused by handling of the prepreg w
35、here only a negligible loss of resin has occurred are permitted. Creases where the glass yarns are exposed due to loss of resin are not permitted. EN 61249-4-2:2005 6 4.1.5 Edge conditions Cut-to-size panels shall have even edges and shall not show loss of resin at the edge due to the cutting proces
36、s by more than 2 mm. Excessive occurrence of resin dust released during the cutting shall be removed before packaging for shipment. 4.2 Properties related to B-stage prepreg A number of characteristics can describe thickness, reactivity and rheology of B-stage prepreg. The choice of characteristics
37、to be used as qualification and quality conformance testing as well as the nominal performance levels are as agreed upon between the user and supplier. Several of the characteristics shown below are interrelated and should not be specified individually. Ordering requirements should preferably be res
38、tricted to the glass style, one characteristic marked (a) in combination with one characteristic marked (b). A maximum of one optional characteristic (c) of B-stage prepreg may be included. Glass style Thickness parameter Resin content (a) Treated weight (a) Reactivity/rheology parameter Resin flow
39、(b) Scaled flow thickness (b) Melt viscosity (b) Cured thickness (b) Optional parameter Volatile content (c) Gel time (c) 4.2.1 Resin content When tested in accordance with test method 2C03 or 2C10 of IEC 61189-2, the nominal resin content shall be as agreed upon between the user and supplier. The t
40、olerance around the ordered nominal value shall be 3 %, e.g. (45 3) %. 4.2.2 Treated weight When tested in accordance with test method 2C03 of IEC 61189-2, the nominal treated weight shall be as agreed upon between the user and supplier. The tolerance around the ordered nominal value shall be 3 %, e
41、.g. (350 10,5) g. 4.2.3 Resin flow When tested in accordance with test method 2M09 of IEC 61189-2, the nominal resin flow shall be as agreed upon between the user and supplier. The tolerance around the ordered nominal value shall be 5 %, e.g. (25 5) %. 7 EN 61249-4-2:2005 4.2.4 Scaled flow thickness
42、 When tested in accordance with test method 2M26 of IEC 61189-2, the nominal scaled flow and the tolerance shall be as agreed upon between the user and supplier. 4.2.5 Melting viscosity When tested in accordance with test method 2C09 of IEC 61189-2, the nominal melt viscosity shall be as agreed upon
43、 between the user and supplier. The tolerance around the ordered nominal value shall be 20 m Pa s, e.g. (240 20) m Pa s. 4.2.6 Gel time When tested in accordance with test method 2C02 of IEC 61189-2, the nominal gel time shall be as agreed upon between the user and supplier. The tolerance around the
44、 ordered nominal value shall be 20 s, e.g. (160 20) s. 4.2.7 Volatile content When tested in accordance with test method 2C04 of IEC 61189-2, the volatile content shall be 0,5 % maximum. 4.3 Properties related to prepreg after curing 4.3.1 Electric strength A total of 2 plies of prepreg of minimum s
45、ize 300 mm 300 mm shall be bonded together and cured in accordance with the manufacturers recommendations whereupon the thickness shall be determined using a micrometer. When tested in accordance with test method 2E11 (under consideration) of IEC 61189-2, the minimum electric strength shall be 25 V/
46、m. 4.3.2 Flammability A number of plies of minimum size 300 mm 300 mm of the prepreg under test shall be bonded together and cured in accordance with the manufacturers recommendations. The number of plies shall be chosen so that a specimen thickness of approximately (0,40,5) mm is obtained as measur
47、ed with a micrometer. When tested in accordance with test method 2C06 of IEC 61189-2, the flammability shall be as shown in Table 1. EN 61249-4-2:2005 8 Table 1 Flammability Property Requirement Designation Flammability (vertical burning test) (nominal material thickness 0,4 mm) Test method(61189-2)
48、 FV0 FV1 1. Flaming combustion time after each application of the flame for each test specimen 2. Total flaming combustion time for the 10 flame applications for each set of five specimens 3. Glowing combustion time after the second removal of the test flame 4. Flaming or glowing combustion up to th
49、e holding clamp 5. Dripping flaming particles that ignite the tissue paper 2C06 10 s 50 s 30 s None None 30 s 250 s 60 s None None 4.3.3 Relative permittivity and dissipation factor A total of 2 plies of prepreg of minimum size 300 mm 300 mm shall be bonded together and fully cured in accordance with the manufacturers recommendations whereupon the thickness shall be determined using a micrometer. When tested
