1、BRITISH STANDARD BS EN 61249-2-4:2002 IEC 61249-2-4:2001 Materials for printed boards and other interconnecting structures Part 2-4: Reinforced base materials, clad and unclad Polyester non-woven/woven fibreglass laminated sheet of defined flammability (vertical burning test), copper-clad The Europe
2、an Standard EN 61249-2-4:2002 has the status of a British Standard ICS 31.180 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 61249-2-4:2002 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was p
3、ublished under the authority of the Standards Policy and Strategy Committee on 8 May 2002 BSI 8 May 2002 ISBN 0 580 39606 1 National foreword This British Standard is the official English language version of EN 61249-2-4:2002. It is identical with IEC 61249-2-4:2001. The UK participation in its prep
4、aration was entrusted to Technical Committee EPL/501, Electronic assembly technology, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old n
5、umber. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications
6、referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions o
7、f a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretatio
8、n, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cove
9、r. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 61249-2-4 NORME EUROPENNE EUROPISCHE NORM March 2002 CENELEC European Committee for Electrotechnical Standardization Comit
10、Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central 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 61249-2-4:2002 E ICS 31.180
11、 English version Materials for printed boards and other interconnecting structures Part 2-4: Reinforced base materials, clad and unclad Polyester non-woven/woven fibreglass laminated sheet of defined flammability (vertical burning test), copper-clad (IEC 61249-2-4:2001) Matriaux pour circuits imprim
12、s et autres structures dinterconnexion Partie 2-4: Matriaux de base renforcs, plaqus et non plaqus Feuille stratifie en fibres de verre non tisses/tisses polyester, dinflammabilit dfinie (essai de combustion verticale), plaque cuivre (CEI 61249-2-4:2001) Materialien fr Leiterplatten und andere Verbi
13、ndungsstrukturen Teil 2-4: Kaschierte und unkaschierte verstrkte Basismaterialien - Kupferkaschierte mit Glaswirrfaser- Innenlagen/Glasgewebe-Deckenlagen verstrkte Polyesterharz-Laminattafeln mit definierter Brennbarkeit (Brennprfung mit vertikaler Prflingslage) (IEC 61249-2-4:2001) This European St
14、andard was approved by CENELEC on 2002-03-01. 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 references conce
15、rning 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 CENELEC member into
16、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, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
17、 Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Foreword The text of document 91/267/FDIS, future edition 1 of IEC 61249-2-4, prepared by IEC TC 91, Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61249-2-4 on 2002-03
18、-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2005-03-01 Annex
19、es designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annex A is informative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 612
20、49-2-4:2001 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6124924:2002 BSI8May2002-94216-24 1002:CEI 3 CONTENTS 1 Scope.4 2 Normative references4 3 Materials and construction 4 3.1 Insulating base 4 3.2 Metal foil5 3.3 Reinforcement .5 4 Internal marking5 5 Elect
21、rical properties 5 6 Non-electrical properties of the copper-clad laminate 5 6.1 Appearance of the copper-clad sheet .5 6.2 Appearance of the unclad face.7 6.3 Laminate thickness7 6.4 Bow and twist 7 6.5 Properties related to the copper foil bond.7 6.6 Punching and machining8 6.7 Dimensional stabili
22、ty8 6.8 Sheet sizes9 6.9 Cut panels .9 7 Non-electrical properties of the base material after removal of the copper foil.10 7.1 Appearance of the dielectric base material.10 7.2 Flexural strength10 7.3 Flammability 11 7.4 Water absorption .11 7.5 Measling11 7.6 Glass transition temperature and cure
23、factor12 7.7 Thermal coefficient of expansion12 8 Quality assurance .12 8.1 Quality system .12 8.2 Responsibility for inspection.12 8.3 Qualification inspection12 8.4 Quality conformance inspection .12 8.5 Certificate of conformance.13 8.6 Safety data sheet.13 9 Packaging and marking.13 10 Ordering
24、information .13 11 Acceptance testing14 Annex A (informative) Conversion table for test method numbers15 Annex ZA (normative) Normative references to international publications with their corresponding European publications20 Page3 EN6124924:2002 BSI8May2002-94216-24 1002:CEI 4 MATERIALS FOR PRINTED
25、 BOARDS AND OTHER INTERCONNECTING STRUCTURES Part 2-4: Reinforced base materials, clad and unclad Polyester non-woven/woven fibreglass laminated sheet of defined flammability (vertical burning test), copper-clad 1 Scope This standard gives requirements for properties of polyester woven fibreglass re
26、inforced surface/non-woven fibreglass reinforced core copper-clad laminated sheet, of defined flammability, in thicknesses of 0,80 mm to 1,60 mm. Some property requirements may have several classes of performance. The class desired must be specified on the purchase order, otherwise the default class
27、 of material will 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 referenced document (including any amendments) appl
28、ies. IEC 61189-2:1997, Test methods for electrical materials, interconnection structures and assemblies Part 2: Test methods for materials for interconnection structures Amendment 1: 2000 IEC 61249-5-1:1995, Materials for interconnection structures Part 5: Sectional specification set for conductive
29、foils and films with or without coatings Section 1: Copper Foil (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 order of sections ISO 14001:1996, En
30、vironmental 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 Insulating base A laminate comprised of polyester woven fibreglass reinforced surface layers with a polyester non-w
31、oven fibreglass reinforced core. Its flame resistance is defined in terms of the flammability requirements of 7.3. Page4 EN6124924:2002 BSI8May2002-94216-24 1002:CEI 5 3.2 Metal foil Copper as specified in IEC 61249-5-1, copper foil (for the manufacture of copper-clad materials). The preferred foils
32、 are electrodeposited, of defined ductility. 3.3 Reinforcement Non-woven E-glass reinforcement: non-woven E-glass fabric (for the manufacture of copper- clad materials). Woven E-glass reinforcement: woven E-glass fabric (for the manufacture of copper-clad materials). 4 Internal marking None required
33、. 5 Electrical properties The electrical property requirements are shown in table 1. Table 1 Electrical properties requirements Property Test method (IEC 61189-2) Requirement Resistance of foil 2E12 As specified in IEC 61249-5-1 Surface resistance after damp heat while in the humidity chamber (optio
34、nal) 2E03 1 000 M Surface resistance 2E03 10 000 M Volume resistivity after damp heat while in the humidity chamber (optional) 2E04 1 000 M m Volume resistivity after damp heat and recovery 2E04 10 000 M m Relative permittivity 2E10 4,1 Dissipation factor after damp heat and recovery 2E10 0,030 Elec
35、tric strength (less than 0,5 mm thickness) 2E11 To be agreed upon between purchaser and supplier Surface resistance at 125 C 2E07 500 M Volume resistivity at 125 C 2E07 100 M m 6 Non-electrical properties of the copper-clad laminate 6.1 Appearance of the copper-clad sheet The copper-clad face shall
36、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 2M18. Page5 EN6124924:2002 BSI8May2002-94216-24 10
37、02:CEI 6 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 total point count f
38、or 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 applies, unless othe
39、rwise 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 are not permitted. For a thick foil, the maximum scratch depth shall not exceed 10 m. Scratches with a depth less than 5 % of the nominal
40、thickness of the foil shall not be counted 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 plat
41、es used during manufacture but may also be caused by blisters 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 following extent: Class A and X material
42、: maximum 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 Page6 EN6124924:2002 BSI8May2002-94216-24 1002:CEI 7 Class A performance shall be in effect unless otherwise noted on the p
43、urchase order. 6.1.5 Surface waviness No requirement. 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
44、 press plate 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 contribution as specified in the purchase order. If the copper-cl
45、ad laminate is tested in accordance with test method 2D01 of IEC 61189-2, the thickness 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. Table 2 Nominal thickness and tolerance of
46、 metal-clad laminate Tolerance requirement mm Thickness including metal foil (material intended for single or double-sided boards) Nominal thickness mm Coarse Fine Extra fine 0,80 1,00 1,30 1,60 0,13 0,17 0,20 0,09 0,11 0,13 0,07 0,08 0,10 The thickness and tolerances do not apply to the outer 25 mm
47、 of the trimmed master sheet or the outer 13 mm of the cut-to-size panel as manufactured and delivered by the supplier. At no point shall the thickness vary from the nominal value by a value greater than 125 % of the specified tolerance. 6.4 Bow and twist When the copper-clad laminate is tested in a
48、ccordance with test method 2M01 of IEC 61189-2, the bow and twist shall be as agreed upon between purchaser and supplier. 6.5 Properties related to the copper foil bond Pull-off and peel strength requirements are shown in table 3. These requirements apply to copper foil with a normal profile depth.
49、Page7 EN6124924:2002 BSI8May2002-94216-24 1002:CEI 8 Table 3 Pull-off and peel strength requirements Property Test method IEC 61189-2 Requirement Pull-off strength 2M05 As agreed upon between purchaser and supplier Thickness of the copper foil 18 m (152 g/m 2 ) 35 m (305 g/m 2 )0,5 N/mm 1,0 N/mm Peel strength after heat shock of 20 s 2M14 No blistering or delaminati
