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 31.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Thu Apr 20 03:12:36 BST 20
3、06, Uncontrolled Copy, (c) BSIBS EN 61249-4-12:2005This British Standard was published 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 6124
4、9-4-12:2005. It is identical with IEC 61249-4-12:2005. The UK participation in its preparation 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 commit
5、tee any enquiries on the interpretation, or proposals for change, and keep UK interests 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-referencesTh
6、e 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 the “Search” facility of the BSI Electronic Catalogue or of British Standar
7、ds 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 from legal obligations.Summary of pagesThis document comprises a front cover, an
8、inside front cover, the EN title page, pages 2 to 13 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Thu Apr 20 03:12:36 BST 2006, Uncontrolled Copy,
9、 (c) BSIEUROPEAN STANDARD EN 61249-4-12 NORME EUROPENNE EUROPISCHE NORM October 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brus
10、sels 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 version Materials for printed boards and other interconnecting structures Part 4-12: Sectional specification set for prepreg materials,
11、 unclad Non-halogenated multifunctional epoxide woven E-glass prepreg of defined flammability (IEC 61249-4-12:2005) Matriaux pour circuits imprims et autres structures dinterconnexion Partie 4-12: Srie de spcifications intermdiaires pour matriaux primprgns, non plaqus Tissu de verre poxyde primprgn
12、multifonctionnel de type E non halogn, dinflammabilit dfinie (CEI 61249-4-12:2005) Materialien fr Leiterplatten und andere Verbindungsstrukturen Teil 4-12: Rahmenspezifikationen fr unkaschierte Prepreg-Materialien Mit E-Glasgewebe verstrkte Prepregs auf der Basis von halogenfreiem multifunktionalem
13、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 CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard
14、 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 versions (English, French, German). A version in any other l
15、anguage 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 Austria, Belgium, Cyprus, Czech Republic, Denmark, Esto
16、nia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Thu Apr 20 03:12:36 BST 2006, Uncontrolled Copy, (c) B
17、SIForeword 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 following dates were fixed: latest date by which the
18、 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 added by CENELEC. _ Endorsement notice The text
19、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 Licensed Copy: Wang Bin, na, Thu Apr 20 03:12:36 BST 2006, Uncontrolled Copy, (c) BSI 3 EN 61249-4-12:2005 CONTENTS 1 Scope 4 2 Normative references .4 3
20、Materials and construction 5 3.1 Reinforcement .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 panel
21、s.9 6 Quality assurance.9 6.1 Quality system.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
22、 ZA (normative) Normative references to international publications with their corresponding European publications13 Table 1 Flammability8 Licensed Copy: Wang Bin, na, Thu Apr 20 03:12:36 BST 2006, Uncontrolled Copy, (c) BSIEN 61249-4-12:2005 4 4_ MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTIN
23、G STRUCTURES Part 4-12: Sectional specification set for prepreg materials, unclad Non-halogenated multifunctional epoxide woven 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
24、connection with laminates according IEC 61249-2- when manufacturing multilayer boards in conformity with IEC 62326-4. This material 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 ful
25、ly cured prepreg is achieved through the use of brominated fire retardants contained as an integral part of the polymeric structure. After lamination according to the suppliers instructions, the glass transition temperature is defined to be 150 C minimum. 2 Normative references The following referen
26、ced 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) applies. IEC 61189-2:1997, Test methods for electrical materials, interconnecti
27、on structures and assemblies Part 2: Test methods for materials for interconnection structures Amendment 1 (2000) IEC 61249-2-7:2002, Materials for printed boards and other interconnecting structures Part 2-7: Reinforced base materials clad and unclad - Epoxide woven E-glass laminated sheet of defin
28、ed flammability (vertical burning test), copper-clad IEC 61249-6-3, Material for printed boards and other interconnecting structures 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 bo
29、ards Part 4: Rigid multilayer printed boards with interlayer connections - Sectional specification 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 1In preparation. Licensed Copy: Wan
30、g Bin, na, Thu Apr 20 03:12:36 BST 2006, Uncontrolled Copy, (c) BSI 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 and partially cured to the B-stage. 3.1 Reinforcement The reinforcement consists of woven
31、 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 epoxide resin with a glass transition temperature of 150 C when cured according to the manufac
32、turers 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 processing such as optical inspection. Its flame resistance is defined in terms of the fl
33、ammability 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 for the intended purpose. 4.1.1 Dewetted areas (fish eyes) Dewetted areas with a diamet
34、er 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 of broken filaments their sizes and frequency of occurrence are important for assessing
35、 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 Distortion When the prepreg is tested in accordance with test method 2M29 (under consideration
36、) 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 loss of resin has occurred are permitted. Creases where the glass yarns are exposed due
37、 to loss of resin are not permitted. Licensed Copy: Wang Bin, na, Thu Apr 20 03:12:36 BST 2006, Uncontrolled Copy, (c) BSIEN 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. Ex
38、cessive 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 qualifica
39、tion 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 st
40、yle, 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 thickne
41、ss (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 nom
42、inal 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. Licensed Copy
43、: Wang Bin, na, Thu Apr 20 03:12:36 BST 2006, Uncontrolled Copy, (c) BSI 7 EN 61249-4-12:2005 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
44、shall be 8 %, e.g. (25 8) %. 4.2.4 Scaled flow thickness When tested in accordance 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 611
45、89-2, the nominal melt viscosity shall be as agreed upon between the user and supplier. 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 3
46、5 s, e.g. (160 35) s. 4.2.7 Volatile content When tested in accordance with test method 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
47、 shall be bonded together and cured in accordance with the manufacturers recommendations 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 Fla
48、mmability A number of plies of minimum size 300 mm 300 mm of the prepreg under test 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
49、a micrometer. When tested in accordance with test method 2C06 of IEC 61189-2, the nominal flammability shall be as shown in Table 1. Licensed Copy: Wang Bin, na, Thu Apr 20 03:12:36 BST 2006, Uncontrolled Copy, (c) BSIEN 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
