1、BRITISH STANDARD BS EN 61249-2-8:2003 Materials for printed boards and other interconnecting structures Part 2-8: Reinforced base materials clad and unclad Modified brominated epoxide woven fibreglass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad The Europe
2、an Standard EN 61249-2-8:2003 has the status of a British Standard ICS 31.180 BS EN 61249-2-8:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 14 August 2003 BSI 14 August 2003 ISBN 0 580 42391 3 National foreword This British Standard is
3、 the official English language version of EN 61249-2-8:2003. It is identical with IEC 61249-2-8:2003. The UK participation in its preparation was entrusted to Technical Committee EPL/501, Electronic assembly technology, which has the responsibility to: A list of organizations represented on this com
4、mittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the
5、“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 its correct application. Compliance with a British Standard does not of itself confer immunity from leg
6、al obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. S
7、ummary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 23 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD
8、EN 61249-2-8 NORME EUROPENNE EUROPISCHE NORM May 2003 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELEC - All rights
9、of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61249-2-8:2003 E ICS 31.180 English version Materials for printed boards and other interconnecting structures Part 2-8: Reinforced base materials clad and unclad Modified brominated epoxide woven fibregl
10、ass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad (IEC 61249-2-8:2003) Matriaux pour circuits imprims et autres structures dinterconnexion Partie 2-8: Matriaux de base renforcs, plaqus et non plaqus Feuilles stratifies renforces en tissu de fibres de verre
11、poxyde brom modifi, dinflammabilit dfinie (essai de combustion verticale), plaques cuivre (CEI 61249-2-8:2003) Materialien fr Leiterplatten und andere Verbindungsstrukturen Teil 2-8: Kaschierte und unkaschierte verstrkte Basismaterialien - Kupferkaschierte mit Glasgewebe verstrkte Laminattafeln auf
12、der Basis von bromhaltigem modifiziertem Epoxidharz definierter Brennbarkeit (Brennprfung mit vertikaler Prflingslage) (IEC 61249-2-8:2003) This European Standard was approved by CENELEC on 2003-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
13、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
14、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 electrot
15、echnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 91/359/FDIS, future edition 1
16、 of IEC 61249-2-8, prepared by IEC TC 91, Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61249-2-8 on 2003-04-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of a
17、n identical national standard or by endorsement (dop) 2004-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2006-04-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information o
18、nly. In this standard, annex ZA is normative and annexes A, B and C are informative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61249-2-8:2003 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6124928:200361249
19、-2-8 IEC:2003 3 CONTENTS 1 Scope.5 2 Normative references5 3 Materials and construction 5 3.1 Resin system.5 3.2 Reinforcement.6 3.3 Metal foil .6 4 Internal marking6 5 Electrical properties 6 6 Non-electrical properties of the copper-clad laminate 7 6.1 Appearance of the copper-clad sheet.7 6.2 App
20、earance of the unclad face.8 6.3 Laminate thickness8 6.4 Bow and twist 9 6.5 Properties related to the copper foil bond.10 6.6 Punching and machining10 6.7 Dimensional stability10 6.8 Sheet sizes11 6.9 Cut panels.11 7 Non-electrical properties of the base material after complete removal of the coppe
21、r foil.12 7.1 Appearance of the dielectric base material.12 7.2 Flexural strength13 7.3 Flammability13 7.4 Water absorption.14 7.5 Measling14 7.6 Glass transition temperature and cure factor14 8 Quality assurance.15 8.1 Quality system.15 8.2 Responsibility for inspection.15 8.3 Qualification inspect
22、ion15 8.4 Quality conformance inspection .15 8.5 Certificate of conformance.15 8.6 Safety data sheet.15 9 Packaging and marking.16 10 Ordering information.16 Annex A (informative) Engineering information .17 Annex B (informative) Common laminate constructions.19 Annex C (informative) Guideline for q
23、ualification and conformance inspection.21 Annex ZA (normative) Normative references to international publications with their corresponding European publications22 Bibliography23 Page3 EN6124928:200361249-2-8 IEC:2003 4 Table 1 Electrical properties .6 Table 2 Nominal thickness and tolerance of meta
24、l-clad laminate.9 Table 3 Bow and twist 9 Table 4 Pull-off and peel strength.10 Table 5 Dimensional stability11 Table 6 Size tolerance for cut panels12 Table 7 Rectangularity of cut panels.12 Table 8 Flexural strength13 Table 9 Flammability 13 Table 10 Water absorption .14 Table 11 Measling14 Table
25、12 Glass transition temperature and cure factor 14 Page4 EN6124928:200361249-2-8 IEC:2003 5 MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES Part 2-8: Reinforced base materials clad and unclad Modified brominated epoxide woven fibreglass reinforced laminated sheets of defined flamma
26、bility (vertical burning test), copper-clad 1 Scope This part of IEC 61249 gives requirements for properties of modified brominated epoxide woven E-glass reinforced laminate sheets of defined flammability (vertical burning test), copper-clad in thicknesses of 0,05 mm up to 3,2 mm. The flammability r
27、ating is acheived through the use of brominated fire retardants reacted as part of the epoxide polymeric structure. The glass transition temperature is defined as being between 150 C and 190 C. Some property requirements may have several classes of performance. The class desired needs to be specifie
28、d on the purchase order, otherwise the default class of material may 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
29、referenced document (including any amendments) applies. IEC 61189-2:1997, Test methods for electrical materials, interconnection structures and assemblies Part 2: Test methods for materials for interconnection structures IEC 61249-5-1:1995, Materials for interconnection structures Part 5: Sectional
30、specification set for conductive foils and films with and without coatings Section 1: Copper foils (for the manufacture of copper-clad base materials) ISO 9000:2000, Quality management systems Fundamentals and vocabulary ISO 11014-1:1994, Safety data sheet for chemical products Part 1: Content and o
31、rder of sections ISO 14001:1996, Environmental management systems Specification 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 Brominated epoxide modified with multifunctional epoxide resulting
32、in a laminate with a glass transition temperature of between 150 C and 190 C. Contrast agents may be added to enhance processing such as automated optical inspection (AOI). Its flame resistance is defined in terms of the flammability requirements of 7.3. Page5 EN6124928:200361249-2-8 IEC:2003 6 3.2
33、Reinforcement Woven E-glass as specified in IEC 61249-6-3, woven E-glass fabric (for the manufacture of prepreg and copper clad materials). 3.3 Metal foil Copper as specified in IEC 61249-5-1, copper foil (for the manufacture of copper-clad materials). The preferred foils are electro-deposited of de
34、fined ductility. 4 Internal marking Not specified. 5 Electrical properties The requirements for the electrical properties are shown in Table 1. Table 1 Electrical properties Property Test method (IEC 61189-2) Requirement Resistance of foil 2E12 As specified in IEC 61249-5-1 Surface resistance after
35、damp heat while in the humidity chamber (optional) 2E03 10 000 M Surface resistance after damp heat and recovery 2E03 50 000 M Volume resistivity after damp heat while in the humidity chamber (optional) 2E04 5 000 Mm Volume resistivity after damp heat and recovery 2E04 10 000 Mm Relative permittivit
36、y after damp heat and recovery at 1 MHz 2E10 5,4 Dissipation factor after damp heat and recovery at 1 MHz 2E10 0,035 Electric strength (only for material thicknesses 0,5 mm) 2E11 30 kV/mm Arc resistance 2E14 60 s Dielectric breakdown (only for material thicknesses 0,5 mm ) 2E15 40 kV Surface resista
37、nce at 125 C 2E07 1 000 M Volume resistivity at 125 C 2E07 1 000 Mm Page6 EN6124928:200361249-2-8 IEC:2003 7 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 ma
38、terials 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 2M18. 6.1.1 Indentations (pits and dents) The size of an indentation, usually the length, shall be determined and giv
39、en a point value to be used as measure of the quality. Size mm Point value for each indentation 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 shall be calculated to determine the indentation class of the material. Class A: 29 maximum Cl
40、ass B: 17 maximum Class C: 5 maximum Class D: 0 Class X: to be agreed upon by user and supplier The required indentation class of material shall be specified in the purchase order. Indentation Class A applies unless otherwise specified. 6.1.2 Wrinkles There shall be no wrinkles in the copper surface
41、. 6.1.3 Scratches Scratches deeper than 10 m or 20 % of the nominal thickness of the foil thickness, whichever is lower, are not permitted. Scratches with a depth less than 5 % of the nominal thickness of the foil shall not be counted unless this depth is 10 m or more. Scratches with a depth between
42、 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. Page7 EN6124928:200361249-2-8 IEC:2003 8 6.1.4 Raised areas Raised areas are usually impressions caused by defects in the press plates used during manufacture but may also be caused
43、 by blisters or inclusions of foreign particles under the foil. Raised areas caused by blisters or inclusions are not permitted. Raised areas caused by impressions of defects in the press plates are permitted to the following extent: Class A and X material: maximum height 15 m and maximum length 15
44、mm; Class B and C material: maximum height 8 m and maximum length 15 mm; Class D material: maximum height 5 m and maximum length 15 mm. Class A performance shall be in effect, unless otherwise noted on the purchase order. 6.1.5 Surface waviness When examined in accordance with test method 2M12 of IE
45、C 61189-2, the surface waviness in both the machine and cross-machine direction shall not exceed 7 m. 6.2 Appearance of the unclad face The unclad face of a single-sided clad sheet shall have the natural appearance resulting from the curing process. Small irregularities in colour are permitted. The
46、gloss of the unclad face shall be that given by the press plate, release film, or release foil used. Variations of gloss due to the impact of pressure of gases released during the curing are permitted. 6.3 Laminate thickness The laminate thickness may be ordered to include or exclude the copper foil
47、 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
48、 shall not depart from the nominal thickness by more than the appropriate value shown in Table 2. The fine tolerances shall apply unless the other tolerances are ordered. Page8 EN6124928:200361249-2-8 IEC:2003 9 Table 2 Nominal thickness and tolerance of metal-clad laminate Tolerance requirement mm Nominal thickness excluding metal foil (material intended for multilayer boards) mm Nominal thickness including metal foil (material intended for single or double sided boards) mm Coarse Fine Extra fine 0,05 0,10 0,10 0,15 0,15 0,30 0,30 0,50 0,50 0,80 0,80 1,00 1,00 1,30 0,80 1,00 1,00
