1、BRITISH STANDARDBS EN 61249-4-12: 2005Materials for printed boards and other interconnecting structures Part 4-12: Sectional specification set for prepreg materials, unclad Non-halogenated multifunctional epoxide woven E-glass prepreg of defined flammabilityThe European Standard EN 61249-4-12:2005 h
2、as the status of a British StandardICS 31.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61249-4-12:2005This British Standard was publishe
3、d under the authority of the Standards Policy and Strategy Committee on 1 February 2006 BSI 1 February 2006ISBN 0 580 47347 3National forewordThis British Standard is the official English language version of EN 61249-4-12:2005. It is identical with IEC 61249-4-12:2005. The UK participation in its pr
4、eparation was entrusted to Technical Committee EPL/501, Electronic assembly technology, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interes
5、ts informed; monitor related international and European developments and promulgate them in the UK.A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred t
6、o in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions o
7、f a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover.The BSI copyrig
8、ht notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 61249-4-12 NORME EUROPENNE EUROPISCHE NORM October 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Norm
9、alisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61249-4-12:2005 E ICS 31.180 English versi
10、on Materials for printed boards and other interconnecting structures Part 4-12: Sectional specification set for prepreg materials, unclad Non-halogenated multifunctional epoxide woven E-glass prepreg of defined flammability (IEC 61249-4-12:2005) Matriaux pour circuits imprims et autres structures di
11、nterconnexion Partie 4-12: Srie de spcifications intermdiaires pour matriaux primprgns, non plaqus Tissu de verre poxyde primprgn multifonctionnel de type E non halogn, dinflammabilit dfinie (CEI 61249-4-12:2005) Materialien fr Leiterplatten und andere Verbindungsstrukturen Teil 4-12: Rahmenspezifik
12、ationen fr unkaschierte Prepreg-Materialien Mit E-Glasgewebe verstrkte Prepregs auf der Basis von halogenfreiem multifunktionalem Epoxidharz mit definierter Brennbarkeit (IEC 61249-4-12:2005) This European Standard was approved by CENELEC on 2005-09-01. CENELEC members are bound to comply with the C
13、EN/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 concerning such national standards may be obtained on application to the Central Secretariat or t
14、o 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 its own language and notified to the Central Secretariat has the same status as the official
15、 versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia,
16、Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 91/529/FDIS, future edition 1 of IEC 61249-4-12, prepared by IEC TC 91, Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61249-4-12 on 2005-09-01. The followi
17、ng 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) 2006-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-09-01 Annex ZA has been add
18、ed by CENELEC. _ Endorsement notice The text of the International Standard IEC 61249-4-12:2005 was approved by CENELEC as a European Standard without any modification. _ EN 61249-4-12:2005 2 3 EN 61249-4-12:2005 CONTENTS 1 Scope 4 2 Normative references .4 3 Materials and construction 5 3.1 Reinforc
19、ement .5 3.2 Resin system.5 4 Properties 5 4.1 Properties related to the appearance of the prepreg .5 4.2 Properties related to B-stage prepreg.6 4.3 Properties related to C stage prepreg after curing 7 5 Delivery form8 5.1 Rolls .8 5.2 Sheets.9 5.3 Cut panels.9 6 Quality assurance.9 6.1 Quality sys
20、tem.9 6.2 Responsibility for inspection 9 6.3 Qualification inspection9 6.4 Quality conformance inspection .9 6.5 Certificate of conformance .9 6.6 Safety data sheet 10 7 Packaging and marking 10 8 Shelf life.10 9 Ordering Information.11 Bibliography .12Annex ZA (normative) Normative references to i
21、nternational publications with their corresponding European publications13 Table 1 Flammability8 EN 61249-4-12:2005 4 4_ MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES Part 4-12: Sectional specification set for prepreg materials, unclad Non-halogenated multifunctional epoxide wove
22、n E-glass prepreg of defined flammability 1 Scope This part of IEC 61249 gives requirements for properties of prepreg that is mainly intended to be used as bonding sheets in connection with laminates according IEC 61249-2- when manufacturing multilayer boards in conformity with IEC 62326-4. This mat
23、erial may be also used to bond other types of laminates. Prepreg according to this standard is of defined flammability (vertical burning test). The flammability rating on fully cured prepreg is achieved through the use of brominated fire retardants contained as an integral part of the polymeric stru
24、cture. After lamination according to the suppliers instructions, the glass transition temperature is defined to be 150 C minimum. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. Fo
25、r undated references, the latest edition of the referenced document (including any amendments) applies. 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 61249-2-
26、7:2002, Materials 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-clad IEC 61249-6-3, Material for printed boards and other interconnecting stru
27、ctures Part 6-3: Sectional specification set for reinforcement materials Woven E-glass (for the manufacture of prepregs and copper-clad base materials1IEC 62326-4, Printed boards Part 4: Rigid multilayer printed boards with interlayer connections - Sectional specification ISO 9000:2000, Quality mana
28、gement systems Fundamentals and vocabulary ISO 11014-1:1994, Safety data sheet for chemical products Part 1: Content and order of sections 1In preparation. 5 EN 61249-4-12:2005 3 Materials and construction The prepreg consists of a reinforcing E-glass fabric which is impregnated with epoxide resin a
29、nd partially cured to the B-stage. 3.1 Reinforcement The reinforcement consists of woven E-glass as specified in IEC 61249-6: Woven E-glass fabric (for the manufacture of prepreg and copper-clad laminate. 3.2 Resin system The resin system consists of a majority non-halogenated multifunctional epoxid
30、e resin with a glass transition temperature of 150 C when cured according to the manufacturers recommendation. The maximum total halogens contained in the resin plus reinforcement matrix is 1 5006with a maximum chlorine of 9006and maximum bromine being 9006. Contrast agents may be added to enhance p
31、rocessing such as optical inspection. Its flame resistance is defined in terms of the flammability requirements of 4.3.2. 4 Properties 4.1 Properties related to the appearance of the prepreg The prepreg shall be substantially free from defects that may have an impact on the materials fitness for use
32、 for the intended purpose. 4.1.1 Dewetted areas (fish eyes) Dewetted areas with a diameter 10 mm are not permissible. Dewetted areas with a diameter 10 mm are permitted to an extent of a maximum 10 fish eyes in any 300 mm x 300 mm area of the prepreg. 4.1.2 Broken filaments When judging the presence
33、 of broken filaments their sizes and frequency of occurrence are important for assessing acceptability but also the flow characteristic of the prepreg shall be taken into consideration. The acceptance conditions for broken filaments shall be as agreed upon between the user and supplier. 4.1.3 Distor
34、tion When the prepreg is tested in accordance with test method 2M29 (under consideration) of IEC 61189-2, the distortion of the fill yarns in the glass fabric shall not exceed 10 % measured over any 300 mm test distance. 4.1.4 Creases Creases caused by handling of the prepreg where only a negligible
35、 loss of resin has occurred are permitted. Creases where the glass yarns are exposed due to loss of resin are not permitted. EN 61249-4-12:2005 6 64.1.5 Edge conditions Cut-to-size panels shall have even edges and shall not show loss of resin at the edge due to the cutting process of more than 8 mm.
36、 Excessive occurrence of resin dust released during the cutting shall be removed before packaging for shipment. 4.2 Properties related to B-stage prepreg A number of characteristics can describe thickness, reactivity and rheology of B-stage prepreg. The choice of characteristics to be used as qualif
37、ication and quality conformance testing as well as the nominal performance levels are as agreed upon between the user and supplier. Several of the characteristics shown below are interrelated and should not be specified individually. Ordering requirements should preferably be restricted to the glass
38、 style, one characteristic marked (a) in combination with one characteristic marked (b). A maximum of one optional characteristic (c) of B-stage prepreg may be included. Glass style Thickness parameter Resin content (a) Treated weight (a) Reactivity/rheology parameter Resin flow (b) Scaled flow thic
39、kness (b) Melt viscosity (b) Cured thickness (b) Optional parameter Volatile content (c) Gel time (c) 4.2.1 Resin content When tested in accordance with test method 2C03 of IEC 61189-2, the nominal resin content shall be as agreed upon between the user and supplier. The tolerance around the ordered
40、nominal value shall be 3 %, e.g. (45 3) %. 4.2.2 Treated weight When tested in accordance with test method 2C03 of IEC 61189-2, the nominal treated weight shall be as agreed upon between the user and supplier. The tolerance around the ordered nominal value shall be 4 %, e.g. (15,0 0,6) g. 7 EN 61249
41、-4-12:2005 4.2.3 Resin flow When tested in accordance with test method 2M09 of IEC 61189-2, the nominal resin flow shall be as agreed upon between the user and supplier. The tolerance around the ordered nominal value shall be 8 %, e.g. (25 8) %. 4.2.4 Scaled flow thickness When tested in accordance
42、with test method 2M26 of IEC 61189-2, the nominal scaled flow and the tolerance shall be as agreed upon between the user and supplier. 4.2.5 Melting viscosity When tested in accordance with test method 2C09 of IEC 61189-2, the nominal melt viscosity shall be as agreed upon between the user and suppl
43、ier. 4.2.6 Gel time When tested in accordance with test method 2C02 of IEC 61189-2, the nominal gel time shall be as agreed upon between the user and supplier. The tolerance around the ordered nominal value shall be 35 s, e.g. (160 35) s. 4.2.7 Volatile content When tested in accordance with test me
44、thod 2C04 of IEC 61189-2, the nominal volatile content shall be 2,0 % maximum. 4.3 Properties related to C stage prepreg after curing 4.3.1 Electric strength A total of 2 plies of prepreg of minimum size 300 mm 300 mm shall be bonded together and cured in accordance with the manufacturers recommenda
45、tions whereupon the thickness shall be determined using a micrometer. When tested in accordance with test method 2E11 (under consideration) of IEC 61189-2, the minimum electric strength flow shall be 25 V/m. 4.3.2 Flammability A number of plies of minimum size 300 mm 300 mm of the prepreg under test
46、 shall be bonded together and cured in accordance with the manufacturers recommendations. The number of plies shall be chosen so that a specimen thickness of approximately (0,4 to 0,5) mm is obtained as measured with a micrometer. When tested in accordance with test method 2C06 of IEC 61189-2, the n
47、ominal flammability shall be as shown in Table 1. EN 61249-4-12:2005 8 8Table 1 Flammability Property Requirement Designation Flammability (vertical burning test) (nominal material thickness 0,4 mm) Test method(61189-2) FV0 FV1 1. Flaming combustion time after each application of the flame for each
48、test specimen 2. Total flaming combustion time for the 10 flame applications for each set of five specimens 3. Glowing combustion time after the second removal of the test flame 4. Flaming or glowing combustion up to the holding clamp 5. Dripping flaming particles that ignite the tissue paper 2C06 1
49、0 s 50 s 30 s None None 30 s 250 s 60 s None None 4.3.3 Relative permittivity and dissipation factor A total of 2 plies of prepreg of minimum size 300 mm 300 mm shall be bonded together and fully cured in accordance with the manufacturers recommendations whereupon the thickness shall be determined using a micrometer. When tested in accordance with test method 2E10 (under consideration) of IEC 61189-2, the relative
