1、BRITISH STANDARD BS EN 61249-2-21: 2003 Materials for printed boards and other interconnecting structures Part 2-21: Reinforced base materials, clad and unclad Non-halogenated epoxide woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad The European
2、Standard EN 61249-2-21:2003 has the status of a British Standard ICS 31.180 BS EN 61249-2-21:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 February 2004 BSI 16 February 2004 ISBN 0 580 43422 2 National foreword This British Standard
3、 is the official English language version of EN 61249-2-21:2003. It is identical with IEC 61249-2-21:2003. 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 thi
4、s committee 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
5、 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 its correct application. Compliance with a British Standard does not of itself confer immunity fro
6、m legal 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
7、UK. Summary 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 notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN ST
8、ANDARD EN 61249-2-21 NORME EUROPENNE EUROPISCHE NORM December 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
9、- All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61249-2-21:2003 E ICS 31.180 English version Materials for printed boards and other interconnecting structures Part 2-21: Reinforced base materials, clad and unclad Non-halogenated epoxide w
10、oven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad (IEC 61249-2-21:2003) Matriaux pour circuits imprims et autres structures dinterconnexion Partie 2-21: Matriaux de base renforcs plaqus et non plaqus Feuilles stratifies renforces en tissu de verre
11、de type E poxyde non halogn, dinflammabilit dfinie (essai de combustion verticale) plaques cuivre (CEI 61249-2-21:2003) Materialien fr Verbindungsstrukturen Teil 2-21: Kaschierte und unkaschierte verstrkte Basismaterialien Kupferkaschierte mit E-Glasgewebe verstrkte Laminattafeln auf der Basis von h
12、alogenfreiem Epoxidharz mit definierter Brennbarkeit (Brennprfung mit vertikaler Prflingslage) (IEC 61249-2-21:2003) This European Standard was approved by CENELEC on 2003-12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving t
13、his 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 versi
14、ons (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
15、Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EN 61249-2-21:2003 - 2 - Foreword The text of document 91/409/FDIS, fut
16、ure edition 1 of IEC 61249-2-21, prepared by IEC TC 91, Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61249-2-21 on 2003-12-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by p
17、ublication of an identical national standard or by endorsement (dop) 2004-09-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2006-12-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given fo
18、r 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 notice The text of the International Standard IEC 61249-2-21:2003 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6
19、1249221:200361249-2-21 IEC:2003 3 CONTENTS OFWERODR.7 1 Scope.5 2 Normative references5 3 Materials and construction 5 3.1 Resin system.6 3.2 Reinforcement .6 3.3 Metal foil6 4 Internal marking6 5 Electrical properties 6 6 Non-electrical properties of the copper-clad laminate 7 6.1 Appearance of the
20、 copper-clad sheet .7 6.2 Appearance of the unclad face.8 6.3 Laminate thickness8 6.4 Bow and twist 9 6.5 Properties related to the copper foil bond .9 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
21、 complete removal of the copper foil.12 7.1 Appearance of the dielectric base material.12 7.2 Flexural strength13 7.3 Flammability 13 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 inspe
22、ction.15 8.3 Qualification inspection15 8.4 Quality conformance inspection15 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 Ann
23、ex C (informative) Guideline for qualification and conformance inspection.21 goilbiBryhpa 22 Page3 EN61249221:2003 -94216-212 3002:CEI 3 TNOCTNES FOREWORD.7 S 1cpoe.5 oN 2rmitave referneces.5. 3 etaMrisla dna cnostrucnoit .5. seR 1.3in sysetm.6 nieR 2.3forcemtne .6 lateM 3.3 foil6 retnI 4lan marknig
24、6 celE 5rtcila preporseit 6 6 noN-electricp lareporseit fo eht ceppo-rcal dalmietan 7 1.6 aeppArnacfo e eht ceppo-rcdal steeh .7 2.6 aeppArnacfo e nu ehtcdal face.8 maL 3.6etani ihtckenss8 4.6 woB t dnawist 9 5.6 Preporseit reht ot detale creppo fdnob lio .9 6.6 nuPcdna gnih machninig01 miD 7.6snela
25、noi stilibaty01 teehS 8.6 sizes11 tuC 9.6 slenap .11 7 -noNcelertcirp lareposeit fo sab ehtm eretaifa laret cmor etelpmefo lavo eht creppo foil.21 1.7 aeppArnacfo e eleid ehtctrci abse metarial.21 xelF 2.7rula strtgneh31 3.7 Flammytiliba 31 W 4.7aret basornoitp .41 aeM 5.7snilg41 6.7 Glass trnaset n
26、oitimeprutardna e cure facotr41 Q 8ytilau assurnace .51 Q 1.8ytilau sysmet .51 2.8 eRsnopsytilibi for nisepcoitn.51 Q 3.8filaucinoita nisepcoitn51 4.8 Qytilau cnoformnacni esepc.noit.51 5.8 eCritficfo eta cnoformnace .51 6.8 aSfeyt atad seeht.51 9 aPckdna gniga marknig.61 01 Oredrgni niformnoita .61
27、 xennA A (inform)evita eenignErni gniformnoita .71 xennA B (inform)evita oCmmal nomietan cnostrucnoits.91 xennA C (inform)evita Genilediu fro ilauqficdna noita cnoformnacni esepcoitn.12 Bibliography 23 3egaP 3002:12294216NE Annex ZA (normative) Normative references to international publications with
28、 their corresponding European publications . 2261249-2-21 IEC:2003 5 Table 1 Electrical properties requirements 6 Table 2 Nominal thickness and tolerance of metal-clad laminate.8 Table 3 Bow and twist.9 Table 4 Pull-off and peel strength .10 Table 5 Dimensional stability 11 Table 6 Size tolerance fo
29、r cut panels 11 Table 7 Rectangularity of cut panels .12 Table 8 Flexural strength13 Table 9 Flammability 13 Table 10 Water absorption .14 Table 11 Measling 14 Table 12 Glass transition temperature and cure factor 14 Page4 EN61249221:200361249-2-21 IEC:2003 13 !“#$%&$!&“(!&“ )& *“+ ,“- .*&$ !“&%“$)$
30、 “&%#&/0.!&#(*$1! +!&“ ! + This part of IEC 61249 gives requirements for properties of non-halogenated epoxide woven E- glass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad in thicknesses 0,05 mm up to 3,2 mm. The flammability rating is achieved through the
31、use of non-halogenated inorganic and/or organic compounds acting as fire retardants. These fire retardants are contained as part of the polymeric structure or in addition to it. The glass transition temperature is defined to be 120 C minimum. Some property requirements may have several classes of pe
32、rformance. The class desired must be specified on the purchase order, otherwise the default class of material may be supplied. %.!$ The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references,
33、 the latest edition of the referenced document (including any amendments) applies. IEC 61189-2:1997, s IEC 61249-5-1:1995, !“ #$ ISO 9000:2000, %& ISO 11014-1:1994, & ! ISO 14001:1996, (& 2 &$“! $(! The sheet consists of an insulating base with metal-foil bonded to one side or both. Page5 EN61249221
34、:200361249-2-21 IEC:2003 15 23 $/$% Non-halogenated epoxide with a glass transition temperature of 120 C minimum. The maximum total halogens contained in the resin plus reinforcement matrix is 1 500 ppm with a maximum chlorine of 900 ppm and maximum bromine being 900 ppm. Contrast agents may be adde
35、d to enhance processing such as automated optical inspection (AOI). Its flame resistance is defined in terms of the flammability requirements of 7.3. 23 !% Woven E-glass as specified in IEC 61249-6-3, woven E-glass fabric (for the manufacture of prepreg and copper clad materials). 232 & & Copper as
36、specified in IEC 61249-5-1, copper foil (for the manufacture of copper-clad materials). The preferred foils are electro-deposited of defined ductility. 4 &%5* Not specified. 6 &!&+ +$ The requirements for the electrical properties are shown in Table 1. #&!&+ +$7(%$ Resistance of foil 2E12 As specifi
37、ed 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 the humidity chamber (optional) 2E04 5 000 M m Volume resistivity after damp heat an
38、d recovery 2E04 10 000 M m Relative permittivity 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
39、 thicknesses 0,5 mm) 2E15 40 kV Surface resistance at 125 C 2E07 1 000 M Volume resistivity at 125 C 2E07 1 000 M m Page6 EN61249221:200361249-2-21 IEC:2003 17 8 &!&+ +$ )! +!&“&% 83 +! )! +!&“$) The copper-clad face shall be substantially free from defects that may have an impact on the materials f
40、itness 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. 833 “ $0+$“$1 The size of an indentation, usually the length, shall be determined and given a point value to be used as
41、measure of the quality. mm 0,13 0,25 0,26 0,50 0,51 0,75 0,76 1,00 Over 1,00 1 2 4 7 30 The total point count for any 300 mm 300 mm area shall be calculated to determine the indentation class of the material. Indentation Class A 29 maximum total point count Indentation Class B 17 maximum total point
42、 count Indentation Class C 5 maximum total point count Indentation Class D 0 total point count Indentation Class X to be agreed upon by user and supplier The required indentation class of material shall be specified in the purchase order. Indentation Class A applies unless otherwise specified. 833 9
43、5&$ There shall be no wrinkles in the copper surface. 8332 !)$ 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
44、 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. 8334 $“$ Raised areas are usually impressions caused by defects in the press plates used during manufacture but may also be caused by bl
45、isters or inclusions of foreign particles under the foil. Page7 EN61249221:200361249-2-21 IEC:2003 19 Raised areas caused by blisters or inclusions are not permitted. Raised areas caused by impressions of defects in press plates are permitted to the following extent: Indentation Class A and X material Maximum height 15 m and maximum length 15 mm Indentation Class B and C material Maximum height 8 m and max
