1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Materials for printed boardsand other interconnectingstructures Part 2-38: Reinforced base materials, clad andunc
2、lad Non-halogenated epoxide woven E-glass laminate sheets of defined flammability(vertical burning test), copper-clad for lead-freeassemblyBS EN 61249-2-38:2009National forewordThis British Standard is the UK implementation of EN 61249-2-38:2009. It isidentical to IEC 61249-2-38:2008.The UK particip
3、ation in its preparation was entrusted to Technical CommitteeEPL/501, Electronic assembly technology.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are resp
4、onsible for its correct application. BSI 2009ISBN 978 0 580 58820 4ICS 31.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 30 June 2009Amendments issued since pu
5、blicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 61249-2-38:2009EUROPEAN STANDARD EN 61249-2-38 NORME EUROPENNE EUROPISCHE NORM March 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische
6、 Normung Central Secretariat: avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61249-2-38:2009 E ICS 31.180 English version Materials for printed boards and other interconnecting structures
7、- Part 2-38: Reinforced base materials, clad and unclad - Non-halogenated epoxide woven E-glass laminate sheets of defined flammability (vertical burning test), copper-clad for lead-free assembly (IEC 61249-2-38:2008) Matriaux pour circuits imprims et autres structures dinterconnexion - Partie 2-38:
8、 Matriaux de base renforcs, plaqus et non plaqus - Feuilles stratifies en tissu de verre de type E poxyde non halognes, plaques cuivre, dinflammabilit dfinie (essai de combustion verticale) pour les assemblages sans plomb (CEI 61249-2-38:2008) Materialien fr Leiterplatten und andere Verbindungsstruk
9、turen - Teil 2-38: Kaschierte und unkaschierte verstrkte Basismaterialien - Kupferkaschierte mit E-Glasgewebe verstrkte Laminattafeln auf der Basis von halogenfreiem Epoxidharz mit definierter Brennbarkeit (Brennprfung mit vertikaler Prflingslage) fr bleifreie Bestckungstechnik (IEC 61249-2-38:2008)
10、 This European Standard was approved by CENELEC on 2009-02-01. 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
11、 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 CEN
12、ELEC 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, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
13、 Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 61249-2-38:2009EN 61249-2-38:2009 2 Foreword The text of document 91/812/FDIS, future edition 1 of IEC 6124
14、9-2-38, prepared by IEC TC 91, Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61249-2-38 on 2009-02-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identica
15、l national standard or by endorsement (dop) 2009-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2012-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61249-2-38:2008 was approved by CENELEC
16、 as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 60194 NOTE Harmonized as EN 60194:2006 (not modified). _ BS EN 61249-2-38:2009 3 EN 61249-2-38:2009 Annex ZA (normative) Normative reference
17、s 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 (inclu
18、ding any amendments) applies. NOTE When 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 2006 Test methods for electrical materials, printed boards and other interconnection structure
19、s and assemblies - Part 2: Test methods for materials for interconnection structures EN 61189-2 2006 IEC 61249-5-1 1995 Materials for interconnection structures - Part 5: Sectional specification set for conductive foils and films with and without coatings - Section 1: Copper foils (for the manufactu
20、re of copper-clad base materials) EN 61249-5-1 1996 ISO 9000 - 1)Quality management systems - Fundamentals and vocabulary EN ISO 9000 2005 2)ISO 11014-1 - 1)Safety data sheet for chemical products - Part 1: Content and order of sections - - ISO 14001 - 1)Environmental management systems - Requiremen
21、ts with guidance for use EN ISO 14001 2004 2)1)Undated reference. 2) Valid edition at date of issue. BS EN 61249-2-38:2009 2 61249-2-38 IEC:2008 CONTENTS 1 Scope.6 2 Normative references6 3 Materials and construction 6 3.1 Resin system.6 3.2 Metal foil .7 3.3 Reinforcement .7 4 Internal marking7 5 E
22、lectrical 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 .8 6.1.5 Surface waviness.9 6.2 Appearance of the unclad face.9 6.3 Laminate thickness
23、9 6.4 Bow and twist 9 6.5 Properties related to the copper foil bond.10 6.6 Punching and machining11 6.7 Dimensional stability11 6.8 Sheet sizes12 6.8.1 Typical sheet sizes 12 6.8.2 Tolerances for sheet sizes .12 6.9 Cut panels.12 6.9.1 Cut panel sizes 12 6.9.2 Size tolerances for cut panels 12 6.9.
24、3 Rectangularity of cut panels .13 7 Non-electrical properties of the base material after complete removal of the copper foil13 7.1 Appearance of the dielectric base material.13 7.2 Flexural strength13 7.3 Flammability14 7.4 Water absorption .14 7.5 Measling15 7.6 Glass transition temperature and cu
25、re factor15 7.7 Decomposition temperature .15 7.8 Thermal resistance 16 7.9 Z-axis expansion .16 8 Quality assurance .16 8.1 Quality system .16 8.2 Responsibility for inspection.16 8.3 Qualification inspection16 8.4 Quality conformance inspection .16 8.5 Certificate of conformance.17 BS EN 61249-2-3
26、8:200961249-2-38 IEC:2008 3 8.6 Safety data sheet.17 9 Packaging and marking.17 10 Ordering information .17 Annex A (informative) Engineering information .18 Annex B (informative) Common laminate constructions.20 Annex C (informative) Guideline for qualification and conformance inspection.22 Bibliog
27、raphy23 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 .11 Table 5 Dimensional stability12 Table 6 Size tolerance for cut panels12 Table 7 Rectangularity of cut panels.13 Table 8 Flexural s
28、trength14 Table 9 Flammability 14 Table 10 Water absorption .14 Table 11 Measling15 Table 12 Glass transition temperature and cure factor 15 Table 13 Decomposition temperature .15 Table 14 Thermal resistance 16 Table 15 Z-axis expansion16 BS EN 61249-2-38:2009 6 61249-2-38 IEC:2008 MATERIALS FOR PRI
29、NTED BOARDS AND OTHER INTERCONNECTING STRUCTURES Part 2-38: Reinforced base materials, clad and unclad Non-halogenated epoxide woven E-glass laminate sheets of defined flammability (vertical burning test), copper-clad for lead-free assembly 1 Scope This part of IEC 61249 gives requirements for prope
30、rties of di-functional non-halogenated epoxide woven E-glass laminate sheet 0,05 mm up to 3,2 mm, of defined flammability (vertical burning test), copper-clad. The glass transition temperature is defined to be 120 C minimum. Its flame resistance is defined in terms of the flammability requirements o
31、f 7.3. Some property requirements may have several classes of performance. The class desired should be specified on 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 doc
32、ument. 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, printed boards and other interconnection structures and assemblies Part 2: T
33、est method for interconnection structures IEC 61249-5-1:1995, Materials for interconnection structures Part 5 : Sectional 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, Quality managemen
34、t systems Fundamentals and vocabulary ISO 11014-1, Safety data sheet for chemical products Part 1: Content and order of sections ISO 14001, Environmental management systems Requirements with guidance for use 3 Materials and construction The sheet consists of an insulating base with metal-foil bonded
35、 to one side or both. 3.1 Resin system Majority di-functional non-halogenated epoxide, modified non-halogenated epoxide, woven E-glass laminate with a glass transition temperature of 120 C minimum. The flammability rating is achieved through the use of non-halogenated flame retardants reacted into t
36、he polymer. Inorganic fillers may be used. Contrast agents may be added to enhance processing such as automated optical inspection (AOI). BS EN 61249-2-38:200961249-2-38 IEC:2008 7 The maximum total halogens contained in the resin plus reinforcement matrix is 1 500 10-6with a maximum chlorine of 900
37、 10-6and maximum bromine being 900 10-6. Its flame resistance is defined in terms of the flammability requirements of 7.3. 3.2 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 defined ductility.
38、3.3 Reinforcement Woven E-glass as specified in the future IEC 61249-6-3, Woven E-glass fabric (for the manufacture of prepreg and copper clad materials). 4 Internal marking Not specified. 5 Electrical properties The electrical property requirements are shown in Table 1. Table 1 Electrical propertie
39、s Property Test method (IEC 61189-2) Requirements Resistance of foil 2E12 As specified in IEC 61249-5-1 Surface resistance after 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
40、the humidity chamber (optional) 2E04 5 000 Mm Volume resistivity after damp heat and recovery 2E04 10 000 Mm Relative permittivity after damp heat and recovery (1 MHz) 2E10 5,4 Dissipation factor after damp heat and recovery (1 MHz) 2E10 0,035 Electric strength (only for material thickness less than
41、 0,5 mm) 2E11 30 kV/mm Arc resistance 2E14 60 s Dielectric breakdown (only for material thicknesses 0,5mm) 2E15 40 kV Surface resistance at 125 C 2E07 1 000 M Volume resistivity at 125 C 2E07 1 000 Mm BS EN 61249-2-38:2009 8 61249-2-38 IEC:2008 6 Non-electrical properties of the copper-clad laminate
42、 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 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 I
43、EC 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 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 tota
44、l point count for any 300 mm 300 mm area 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 appli
45、es 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 permitted. Scratches with a depth less than 5 % of the nominal thickness of the foil shall not be counted
46、unless this depth is 10 m or more. 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
47、caused by blisters or inclusions of foreign particles under the foil. Raised areas caused by blisters or inclusions are not permitted. BS EN 61249-2-38:200961249-2-38 IEC:2008 9 Raised areas being impressions of defects in press plates are permitted to the following extent: Class A and X material ma
48、ximum height 15 m and maximum length 15 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. 6.1.5 Surface waviness When examined in accordance with test method 2M12 of IEC 61189-2, the surface waviness in both the mach
49、ine and cross machine direction shall not exceed 7 m. 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 permitted. 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 g
