1、BRITISH STANDARDBS EN 61249-2-7:2002Materials for printed boards and other interconnecting structures Part 2-7: Reinforced base materials clad and unclad Epoxide woven E-glass laminated sheet of defined flammability (vertical burning test), copper-cladThe European Standard EN 61249-2-7:2002 has the
2、status of a British StandardICS 31.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58IncorporatingCorrigendum No. 1BS EN 61249-2-7:2002This British
3、 Standard, havingbeen prepared under thedirection of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy andStrategy Committee on 19 August 2002 BSI August 2006ISBN 0 580 40264 9National forewordThis British Standard is the official En
4、glish language version ofEN 61249-2-7:2002, including Corrigendum September 2005. It is identicalwith IEC 61249-2-7:2002. It supersedes BS EN 60249-2-5:1994 and TheUK participation in its preparation was entrusted to Technical CommitteeEPL/501,Electronic assembly technology, which has the responsibi
5、lityto:A list of organizations represented on this subcommittee can be obtained on request to its secretary.From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1.For a period of time during the change over f
6、rom one numbering system to the other, publications may contain identifiers from both systems.Cross-referencesThe British Standards which implement international or Europeanpublications referred to in this document may be found in the BSI Catalogueunder the section entitled “International Standards
7、Correspondence Index”, orby using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.A British Standard does not purport to include all the necessary provisions ofa contract. Users are responsible for their correct application.Compliance with a British Standard does
8、 not of itself confer immunityfrom legal obligations. aid enquirers to understand the text; present to the responsible international/European committee anyenquiries on the interpretation, or proposals for change, and keep theUK interests informed; monitor related international and European developme
9、nts andpromulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 21, and a back cover.The BSI copyright date displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No.
10、Date Comments16313Corrigendum No. 1August 2006 Supersession details added to theforeword and superssession note addedto EN title page.BS EN 60249-2-12:1994 which are withdrawn.EUROPEAN STANDARD EN 61249-2-7NORME EUROPENNEEUROPISCHE NORM June 2002CENELECEuropean Committee for Electrotechnical Standar
11、dizationComit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische NormungCentral Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.Ref. No. EN 61249-2-7:2002 E
12、ICS 31.180English versionMaterials for printed boards and other interconnecting structuresPart 2-7: Reinforced base materials clad and unclad -Epoxide woven E-glass laminated sheet of defined flammability(vertical burning test), copper-clad(IEC 61249-2-7:2002)Matriaux pour circuits imprimset autres
13、structures dinterconnexionPartie 2-7: Matriaux de base renforcs,plaqus et non plaqus -Feuille stratifie tisse de verre E avecde la rsine poxyde, dinflammabilitdfinie (essai de combustion verticale),plaque cuivre(CEI 61249-2-7:2002)Materialien fr Leiterplattenund andere VerbindungsstrukturenTeil 2-7:
14、 Kaschierte und unkaschierteverstrkte Basismaterialien -Kupferkaschierte mit Glasgewebeverstrkte Epoxidharz-Laminattafelmit definierter Brennbarkeit(Brennprfung mit vertikaler Prflingslage)(IEC 61249-2-7:2002)This European Standard was approved by CENELEC on 2002-06-01. CENELEC members are bound toc
15、omply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration.Up-to-date lists and bibliographical references concerning such national standards may be obtained onapplication to the Central Sec
16、retariat or to any CENELEC member.This European Standard exists in three official versions (English, French, German). A version in any otherlanguage made by translation under the responsibility of a CENELEC member into its own language andnotified to the Central Secretariat has the same status as th
17、e official versions.CENELEC members are the national electrotechnical 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.S
18、upersedes EN 60249-2-5:1994 & EN 60249-2-12:1994 and their amendments Incorporates Corrigendum September 2005Page 2EN 6124927:2002ForewordThe text of document 91/276/FDIS, future edition 1 of IEC 61249-2-7, prepared by IEC TC 91, Electronicsassembly technology, was submitted to the IEC-CENELEC paral
19、lel vote and was approved by CENELEC asEN 61249-2-7 on 2002-06-01.This European Standard supersedes EN 60249-2-5:1994 + corrigendum March 1994 + A3:1994 + corrigendumMarch 1994 + A4:1995 + A5:2000 and EN 60249-2-12:1994 + A2:1994 + A3:1995 + A4:2000.The following dates were fixed: latest date by whi
20、ch the EN has to be implementedat national level by publication of an identicalnational standard or by endorsement (dop) 2003-03-01 latest date by which the national standards conflictingwith the EN have to be withdrawn (dow) 2005-06-01Annexes designated “normative“ are part of the body of the stand
21、ard.Annexes designated “informative“ are given for information only.In this standard, annex ZA is normative and annexes A, B and C are informative.Annex ZA has been added by CENELEC._Endorsement noticeThe text of the International Standard IEC 61249-2-7:2002 was approved by CENELEC as a EuropeanStan
22、dard without any modification._CONTENTS1 Scope.42 Normative references43 Materials and construction 43.1 Insulating base 43.2 Metal foil .53.3 Reinforcement .54 Internal marking55 Electrical properties 56 Non-electrical properties of the copper-clad laminate 66.1 Appearance of the copper-clad sheet.
23、66.2 Appearance of the unclad face.76.3 Laminate thickness76.4 Bow and twist 86.5 Properties related to the copper foil bond.96.6 Punching and machining96.7 Dimensional stability106.8 Sheet sizes106.9 Cut panels.107 Non-electrical properties of the base material after removal of the copper foil117.1
24、 Appearance of the dielectric base material.117.2 Flexural strength127.3 Flammability127.4 Water absorption .137.5 Measling137.6 Glass transition temperature and cure factor148 Quality assurance .148.1 Quality system .148.2 Responsibility for inspection.148.3 Qualification inspection148.4 Quality co
25、nformance inspection .158.5 Certificate of conformance.158.6 Safety data sheet.159 Packaging and marking.1510 Ordering information .15Annex A (informative) Engineering information 17Annex B (informative) Common laminate constructions19Annex C (informative) Guideline for qualification and conformance
26、 inspection20Annex ZA (normative) Normative references to international publications with theircorresponding European publications21Page 3EN 6124927:2002MATERIALS FOR PRINTED BOARDS ANDOTHER INTERCONNECTING STRUCTURES Part 2-7: Reinforced base materials clad and unclad Epoxide woven E-glass laminate
27、d sheet of definedflammability (vertical burning test), copper-clad1 ScopeThis part of IEC 61249 gives requirements for properties of epoxide woven E-glass laminatedsheet 0,05 mm up to 3,2 mm, of defined flammability (vertical burning test), copper-clad.The flammability rating is achieved through th
28、e use of brominated fire retardants containedas an integral part of the polymeric structure. The glass transition temperature is defined tobe 120 C minimum.Some property requirements may have several classes of performance. The class desiredmust be specified on the purchase order otherwise the defau
29、lt class of material will besupplied.2 Normative referencesThe following referenced documents are indispensable for the application of this document. Fordated references, only the edition cited applies. For undated references, the latest edition ofthe referenced document (including any amendments) a
30、pplies.IEC 61189-2:1997, Test methods for electrical materials, interconnection structures andassemblies Part 2: Test methods for materials for interconnection structuresIEC 61249-5-1:1995, Materials for interconnection structures Part 5: Sectional specificationset for conductive foils and films wit
31、h or without coatings Section 1: Copper Foil (for themanufacture of copper-clad base materials)ISO 9000:2000, Quality management systems Fundamentals and vocabularyISO 11014-1:1994, Safety data sheet for chemical products Part 1: Content and order ofsectionsISO 14001:1996, Environmental management s
32、ystems Specification with guidance for use3 Materials and constructionThe sheet consists of an insulating base with metal-foil bonded to one side or both.3.1 Insulating baseMajority difunctional epoxide woven E-glass laminate with a glass transition temperature of120 g176C minimum.Page 4EN 6124927:2
33、002Contrast 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 7.3.3.2 Metal foilCopper as specified in IEC 61249-5-1, copper foil (for the manufacture of copper-cladmaterials). The preferre
34、d foils are electrodeposited of defined ductility.3.3 ReinforcementWoven E-glass: woven E-glass fabric (for the manufacture of prepreg and copper-cladmaterials).4 Internal markingNone required5 Electrical propertiesThe electrical property requirements are shown in table 1.Table 1 Electrical properti
35、esProperty Test method(IEC 61189-2)RequirementResistance of foil 2E12 As specified in IEC 61249-5-1Surface resistance after damp heatwhile in the humidity chamber(optional)2E03 g17910 000 Mg87Surface resistance 2E03 g17950 000 Mg87Volume resistivity after damp heatwhile in the humidity chamber(optio
36、nal)2E04 g1795 000 Mg87mVolume resistivity after damp heatand recovery2E04 g17910 000 Mg87mRelative permittivity 2E10 g1635,4Dissipation factor after damp heatand recovery2E10 g1630,035Electric strength(less than 0,5 mm thickness)2E11 g17930 kV/mmArc resistance 2E14 g17960 sDielectric breakdown(grea
37、ter than, or equal to0,5 mm thickness)2E15 g17940 kVSurface resistance at 125 C 2E07 g1791 000 Mg87Volume resistivity at 125 C 2E07 g1791 000 Mg87mPage 5EN 6124927:20026 Non-electrical properties of the copper-clad laminate6.1 Appearance of the copper-clad sheetThe copper-clad face shall be substant
38、ially free from defects that may have an impact on thematerial fitness for use for the intended purpose.For the following specific defects, the requirements given shall apply when inspection is madein accordance with IEC 61189-2, method 2M18.6.1.1 Indentations (pits and dents)The size of an indentat
39、ion, usually the length, shall be determined and given a point value to beused as measure of the quality.SizemmPoint value foreach indentation0,13 0,250,26 0,500,51 0,750,76 1,00over 1,00124730The total point count for any 300 mm g180 300 mm area shall be calculated to determine the classof the mate
40、rial.Class A 29 maximumClass B 17 maximumClass C 5 maximumClass D 0Class X to be agreed upon by user and supplierThe required class of material shall be specified in the purchase order. Class A applies unlessotherwise specified.6.1.2 WrinklesThere shall be no wrinkles in the copper surface.6.1.3 Scr
41、atchesScratches deeper than 20 % of the nominal thickness of the foil thickness are not permitted.For thick foil the maximum scratch depth shall not exceed 10 g109m.Scratches with a depth less than 5 % of the nominal thickness of the foil shall not be countedunless this depth is 10 g109m or more.Scr
42、atches with a depth between 5 % and 20 % of the nominal thickness of the foil arepermitted to a total length of 100 mm for a 300 mm g180 300 mm area.Page 6EN 6124927:20026.1.4 Raised areasRaised areas are usually impressions in the press plates used during manufacture but mayalso be caused by bliste
43、rs or inclusions of foreign particles under the foil.Raised areas caused by blisters or inclusions are not permitted.Raised areas that are impressions of defects in press plates are permitted to the followingextent:Class A and X material maximum height 15 g109m and maximum length 15 mmClass B and C
44、material maximum height 8 g109m and maximum length 15 mmClass D material maximum height 5 g109m and maximum length 15 mmClass A performance shall be in effect unless otherwise noted on the purchase order.6.1.5 Surface wavinessWhen examined in accordance to test method 2M12 of IEC 61189-2, the surfac
45、e waviness inboth the machine and cross-machine direction shall not exceed 5 g109m.6.2 Appearance of the unclad faceThe unclad face of a single-side clad sheet shall have the natural appearance resulting fromthe curing process. Small irregularities in colour are permitted. The gloss of the unclad fa
46、ceshall be that given by the press plate or release foil used. Variations of gloss due to the impactof pressure of gases released during the curing are permitted.6.3 Laminate thicknessThe laminate thickness may be ordered to include or exclude the copper foil contribution asspecified in the purchase
47、 order. As a general rule, laminates less than 0,8 mm are measuredexcluding copper and laminates greater than, or equal to, 0,8 mm are measured includingcopper. If the copper-clad laminate is tested in accordance with test method 2D01 ofIEC 61189-2, the thickness shall not depart from the nominal th
48、ickness by more than theappropriate value shown in table 2. The fine tolerances shall apply unless the other tolerancesare ordered.Page 7EN 6124927:2002Table 2 Nominal thickness and tolerance of metal-clad laminateTolerance requirementg177 mmThickness excludingmetal foil(material intended formultila
49、yer boards)Nominal thicknessmmThickness includingmetal foil(material intended for single-ordouble-sided boards)Nominal thicknessmmCoarse Fine Extra fineg1790,05 g1630,100,10 g1630,150,15 0,300,30 g1630,500,50 g1630,800,80 g1631,001,00 g1631,30g1790,80 g1631,001,00 g1631,301,30 g1631,701,70 g1632,102,10 g1632,602,60 g1633,200,030,040,050,080,090,130,170,200,230,250,300,020,030,040,050,060,090,110,130,150,180,200,010,020,030,040,050,070,080,100,120,150,15The thickness and tolerances do not apply to
