1、BRITISH STANDARD BS EN 61249-2-12: 1999 IEC 61249-2-12: 1999 Materials for printed boards and other interconnecting structures Part 2-12: Sectional specification set forreinforced base materials, clad andunclad Epoxide non-woven aramid laminate of defined flammability, copper-clad The European Stand
2、ard EN61249-2-12:1999 has the status of a BritishStandard ICS 31.180BSEN61249-2-12:1999 This BritishStandard, having been prepared under the directionof the Electrotechnical Sector Committee, was publishedunder the authorityofthe Standards Committee and comes into effect on 15June1999 BSI03-2000 ISB
3、N 0 580 32531 8 National foreword This BritishStandard is the English language version of EN61249-2-12:1999. It is identical with IEC61249-2-12:1999. The UK participation in its preparation was entrusted to Technical Committee EPL/501, Electronic assembly technology, which has the responsibility to:
4、 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. A list of organi
5、zations represented on this committee can be obtained on request to its secretary. From1January1997, all IEC publications have the number60000 added to the old number. For instance, IEC27-1 has been renumbered as IEC60027-1. For a period of time during the change over from one numbering system to th
6、e other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standar
7、ds which implement these international or European publications 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 inc
8、lude all the necessary provisions of 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. Summary of pages This document comprises a front cover, an inside front cover, page
9、si andii, theEN title page, pages2 to14 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN61249-2-12:19
10、99 BSI 03-2000 i Contents Page National foreword Inside front cover Foreword 2 Text of EN61249-2-12 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN61249-2-12 April1999 ICS31.180 English version Materials for printed boards and other interconnectingstructures Part2-12: Sectional specifi
11、cation set for reinforced base materials, clad and unclad Epoxide non-woven aramid laminate of defined flammability, copper-clad (IEC61249-2-12:1999) Matriaux pour circuits imprims et autres structures dinterconnexion Partie2-12: Collection de spcifications intermdiaires pour les matriaux de base re
12、nforcs, recouverts ou non de feuille conductrice Stratifi base daramide non tiss coll avec de la rsine epoxyde, recouvert de cuivre, dinflammabilit dfinie (CEI61249-2-12:1999) Materialien fr Leiterplatten und andere Verbindungsstrukturen Teil2-12: Rahmenspezifikation fr verstrkte, kaschierte und unk
13、aschierte Basismaterialien Aramidwirrfaser-verstrktes Epoxidharz-Laminat mit definierter Brennbarkeit, kupferkaschiert (IEC61249-2-12:1999) This European Standard was approved by CENELEC on1999-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the c
14、onditions 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 i
15、n 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 electrote
16、chnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normal
17、isation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1999 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN61249-2-12:1999 EEN61249-2-12:1999 BSI 03-2000 2
18、Foreword The text of document52/772/FDIS, future edition1 of IEC61249-2-12, prepared by IEC TC52, Printed circuits, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN61249-2-12 on1999-04-01. The following dates were fixed: Annexes designated “normative” are part of the
19、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 IEC61249-2-12:1999 was approved by CENELEC as a Euro
20、pean Standard without any modification. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Materials and construction 3 4 Internal marking 3 5 Electrical properties 3 6 Non-electrical properties of the copper-clad laminate 4 7 Non-electrical properties of the base material after complete
21、removal of the copper foil 7 8 Packaging and marking 9 9 Acceptance testing 9 Annex A (informative) Conversion table for test method reference numbers 10 Annex ZA (normative) Normative references tointernational publications with their correspondingEuropean publications 14 Table 1 Electrical propert
22、ies 3 Table 2 Types, sizes and permitted numberofimperfections 4 Table 3 Nominal thickness and tolerances ofmetal-clad laminate 5 Table 4 Pull-off and peel strength 6 Table 5 Dimensional stability 6 Table 6 Size tolerances for cut panels 7 Table 7 Rectangularity of cut panels 7 Table 8 Flexural stre
23、ngth 7 Table 9 Flammability 8 Table 10 Water absorption 8 Table 11 Glass transition temperature and cure factor 9 Table 12 Thermal coefficient of expansion 9 Table 13 Recommended acceptance tests 9 latest date by which the ENhas to be implemented at national level by publication of an identical nati
24、onal standard or by endorsement (dop)2000-01-01 latest date by which the national standards conflicting with the EN haveto be withdrawn (dow)2002-01-01EN61249-2-12:1999 BSI 03-2000 3 1 Scope This part of IEC61249 gives requirements for properties of epoxide non-woven aramid copper-clad laminate of d
25、efined flammability, in thicknesses of0,05mm up to6,4mm. NOTETo designate this material, the reference:61249-2-12-FV1-IEC-EP-AP-Cu may be used; if there is no risk of confusion, the type designation may be abbreviated to read IEC-61249-2-12-FV1. 2 Normative references The following normative documen
26、ts contain provisions which, through reference in this text, constitute provisions of this part of IEC61249. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC61249 are encouraged to inve
27、stigate the possibility of applying the most recent editions of the normative documents listed below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC61189-2:1997, Test methods for electrical materials, interconnection structures and assemblies Part2: Test me
28、thods for materials for interconnection structures. IEC61249-5-1:1995, Materials for printed boards and other interconnecting structures Part5: Sectional specification set for conductive foils and films with or without coatings Section1: Copper foils (forthemanufacture of copper-clad base materials)
29、. 3 Materials and construction The material consists of an insulating base with metal foil bonded to one side or both. 3.1 Insulating base Epoxide resin bonded non-woven aramid laminate. Its flame resistance is defined in terms of the flammability requirements of7.3. 3.2 Metal foil Copper as specifi
30、ed in IEC61249-5-1. The preferred foils are type E1 (standard electro-deposited copper) of standard ductility. 4 Internal marking Not specified. 5 Electrical properties Table 1 Electrical properties Property Test method (IEC61189-2) Requirements Resistance of foil 2E12 As specified in IEC61249-5-1 S
31、urface resistance after damp heat while in the humidity chamber (optional) 2E03 1000M7 min. Surface resistance after damp heat and recovery 2E03 10000M7 min. Volume resistivity after damp heat while in the humidity chamber (optional) 2E04 1000M7 min. Volume resistivity after damp heat and recovery 2
32、E04 10000M7 min. Surface corrosion 2E08 No visible corrosion products in the gap Corrosion at the edge 2E13 Positive pole: not worse than A/B Negative pole: not worse than1,4 Relative permittivity after damp heat and recovery 2E10 The average value shall not exceed4,5 Dielectric dissipation factor a
33、fter damp heat and recovery 2E10 The average value shall not exceed0,03 Electrical strength (optional) material thickness not greater than0,8mm 2E11 30kV/mmmin. Surface resistance at200 C 2E07 1000M7 min. Volume resistivity at200 C 2E07 10M7 min.EN61249-2-12:1999 4 BSI 03-2000 6 Non-electrical prope
34、rties of the copper-clad laminate 6.1 Appearance of the copper-clad face 6.1.1 Normal surface appearance The copper-clad face shall be substantially free from blisters, wrinkles, pin-holes, deep scratches, pits and resin. Any discoloration or contamination shall be readily removable with a hydrochlo
35、ric acid solution of density1,02g/cm 2or with a suitable organic solvent. 6.1.2 Qualified surface appearance (optional) If a surface of high quality is essential for precious metal plating or fine line etching and is ordered by the purchaser, the following requirements shall apply in addition to tho
36、se of6.1.1 when inspected in accordance with2M18 of IEC61189-2. The surface appearance of the copper-clad face shall be such as not to conceal imperfections. The surface of the copper foil shall be free from scratches of depth greater than104m or1/5 of the nominal thickness of the copper foil, which
37、ever is lower. The total length of scratches of depth greater than54m but not more than104m shall not exceed1m per square metre of the total area of the material under test. This requirement applies to the surface of354m and704m(305g/m 2and610g/m 2 ) foils. Permitted scratches on surfaces of184m(152
38、g/m 2 ) foil are still under consideration. The total area of all pin-holes in an area of0,5m 2shall not exceed0,012mm 2 . No sheet shall have more imperfections of the types listed than those permitted byTable 2. 6.1.3 Surface waviness (optional) Under consideration. 6.2 Appearance of the unclad fa
39、ce The unclad face of laminate, copper-clad on one side only, shall be free from all materials, for example release agents, oils or lubricants, that might interfere with its adhesion in the multilayer fabrication operation. Table 2 Types, sizes and permitted number of imperfections Type Size (length
40、 unless otherwise indicated) Number of imperfections permitted Above mm Not above mm In any sheet of area about1m 2 In any area 300mm 300mm Inclusions 0,1 0,25 0,1 0,25 Any number 30 0 Any number 4 0 Indentations 0,25 1,25 3,0 or width1,0 0,25 1,25 3,0 or width1,0 Any number 13 b 3 b 0 Any number 3
41、a 1 a 0 Bumps 0,1 4,0 or height0,1 0,1 4,0 or height0,1 Any number 10 0 Any number 2 0 Wrinkles, blisters Of any size 0 0 NOTEFor sheets1m 2or greater, the values of the fourth column apply for any area of1m 2 ; for the same sheets in any area of300mm 300mm, however, the values of the fifth column a
42、pply. For sheets smaller than1m 2 , the fifth column applies for any area of300mm 300mm. a The total for these sizes of indentation is3. b The total for these sizes of indentation is13.EN61249-2-12:1999 BSI 03-2000 5 6.3 Thickness Including copper foil If the copper-clad laminate is tested in accord
43、ance with test method2D01 of IEC61189-2, the thickness, including the copper foil, shall not depart from the nominal thickness by more than the appropriate value shown inTable 3. The coarse tolerances shall apply unless the fine tolerances are ordered. Excluding copper foil If the base material is t
44、ested in accordance with test method2D01 of IEC61189-2, the thickness, excluding the copper foil, shall not depart from the nominal thickness by more than the appropriate value shown inTable 3. The coarse tolerances shall apply unless the fine tolerances are ordered. Table 3 Nominal thickness and to
45、lerances of metal-clad laminate The thickness and tolerance do not apply to the outer25mm of the trimmed laminate as manufactured and delivered by the supplier. At least90% of the area, regardless of size, shall be within the tolerance given, and at no point shall the thickness vary from the nominal
46、 by a value greater than125% of the specified tolerance. For any nominal thickness within the range of0,8mm to6,4mm, which is not given in the table of nominal thicknesses and corresponding tolerances, the tolerance applicable to the thickness shall be that for the next greater nominal thickness giv
47、en inTable 3. 6.4 Bow and twist Under consideration. Nominal thickness with copper foil Tolerance mm mm Coarse (normal) Fine (special) 0,8 1,0 1,2 1,5 1,6 2,0 2,4 3,2 6,4 0,15 0,17 0,18 0,20 0,20 0,23 0,25 0,30 0,56 0,09 0,11 0,12 0,14 0,14 0,15 0,18 0,20 0,30 Nominal thickness without copper foil m
48、m Coarse (normal) Fine (special) U 0,05;0,11 U 0,11;0,15 U 0,15;0,3 U 0,3;0,5 U 0,5;0,8 0,03 0,04 0,05 0,08 0,09 0,02 0,03 0,04 0,05 0,06EN61249-2-12:1999 6 BSI 03-2000 6.5 Properties relating to the copper foil bond Table 4 Pull-off and peel strength 6.6 Punching and machining Punching is not appli
49、cable. The laminate shall, in accordance with the manufacturers recommendations, be capable of being sheared or drilled. Delamination at the edges due to the shearing process is permissible, provided that the depth of delamination may not be larger than the thickness of the base material. Delamination at the edges of drilled holes due to the drilling process is not permissible. Drilled holes shall be capable of being through-plated with no interference from any exudations into th
