1、BRITISH STANDARDBS EN 61249-4-2: 2005Materials for printed boards and other interconnecting structures Part 4-2: Sectional specification set for prepreg materials, unclad Multifunctional epoxide woven E-glass prepreg of defined flammabilityThe European Standard EN 61249-4-2:2005 has the status of a
2、British StandardICS 31.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Thu Apr 20 02:42:30 BST 2006, Uncontrolled Co
3、py, (c) BSIBS EN 61249-4-2:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 1 February 2006 BSI 1 February 2006National forewordThis British Standard is the official English language version of EN 61249-4-2:2005. It is identical with IEC 6
4、1249-4-2:2005. 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 committee any enquiries on the interpretation,
5、 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-referencesThe British Standards which implement inte
6、rnational 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 Standards Online.This publication does not purp
7、ort 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 inside front cover, the EN title page, p
8、ages 2 to 12, an inside back cover 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 CommentsISBN 0 580 47351 1Licensed Copy: Wang Bin, na, Thu Apr 20 02:42:30 BST 2006, Uncontrolled Copy,
9、 (c) BSIEUROPEAN STANDARD EN 61249-4-2 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 Bruss
10、els 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61249-4-2:2005 E ICS 31.180 English version Materials for printed boards and other interconnecting structures Part 4-2: Sectional specification set for prepreg materials, un
11、clad - Multifunctional epoxide woven E-glass prepreg of defined flammability (IEC 61249-4-2:2005) Matriaux pour circuits imprims et autres structures dinterconnexion Partie 4-2: Srie de spcifications intermdiaires pour matriaux primprgns, non plaqus Tissu de verre poxyde de type E primprgn multifonc
12、tionnel dinflammabilit dfinie (CEI 61249-4-2:2005) Materialien fr Leiterplatten und andere Verbindungsstrukturen Teil 4-2: Rahmenspezifikationen fr unkaschierte Prepreg-Materialien Mit E-Glasgewebe verstrkte Prepregs auf der Basis von multifunktionalem Epoxidharz mit definierter Brennbarkeit (IEC 61
13、249-4-2:2005) 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 without any alteration. Up-to-date lists and bi
14、bliographical 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 language made by translation under the responsibi
15、lity 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, Estonia, Finland, France, Germany, Greece, Hungary,
16、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 02:42:30 BST 2006, Uncontrolled Copy, (c) BSIForeword The text of document 91/526/FDIS, fut
17、ure edition 1 of IEC 61249-4-2, prepared by IEC TC 91, Electronics assembly technology, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61249-4-2 on 2005-09-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by pub
18、lication 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 of the International Standard IEC 61249-4-2:2005 w
19、as approved by CENELEC as a European Standard without any modification. _ EN 61249-4-2:2005 2 Licensed Copy: Wang Bin, na, Thu Apr 20 02:42:30 BST 2006, Uncontrolled Copy, (c) BSI 3 EN 61249-4-2:2005 CONTENTS 1 Scope 4 2 Normative references. 4 3 Materials and construction . 5 3.1 Reinforcement 5 3.
20、2 Resin system 5 4 Properties5 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 prepreg after curing 7 5 Delivery form. 8 5.1 Rolls. 8 5.2 Sheets 9 5.3 Cut panels 9 6 Quality assurance 9 6.1 Quality system 9 6.2 Responsib
21、ility for inspection 9 6.3 Qualification inspection. 9 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.10 Annex ZA (normative) Normative references to international publications with the
22、ir Table 1 Flammability. 8 corresponding European publications 12Licensed Copy: Wang Bin, na, Thu Apr 20 02:42:30 BST 2006, Uncontrolled Copy, (c) BSIEN 61249-4-2:2005 4 MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES Part 4-2: Sectional specification set for prepreg materials, unc
23、lad 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 connection with laminates according to IEC 61249-2-8 when manufacturing multilayer boards acco
24、rding to 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 fully cured prepreg is achieved through the use of brominated fire retardants contained as an integ
25、ral part of the polymeric structure. After curing of the prepreg according to the suppliers instructions, the glass transition temperature is defined as 150 C minimum. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated referenc
26、es, 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, printed boards and other inter-connecting structures and assemblies Part 2: Test methods for material
27、s for interconnection structures Amendment 1 (2000) IEC 61249-2-8:2003, Materials for printed boards and other interconnecting structures Part 2-8: Reinforced base materials, clad and unclad Modified brominated epoxide woven fibreglass reinforced laminated sheets of defined flammability, copper-clad
28、 IEC 61249-6-3, Material for interconnection structures Part 6-3: Sectional specification set for reinforcement materials Woven E-glass (for the manufacture of prepregs and copper-clad base materials 1IEC 62326-4:1996, Printed boards Part 4: Rigid multilayer printed boards with interlayer connection
29、s 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 ISO 14001:2004, Environmental management systems Requirements with guidance for use _ 1In preparation. Licen
30、sed Copy: Wang Bin, na, Thu Apr 20 02:42:30 BST 2006, Uncontrolled Copy, (c) BSI 5 EN 61249-4-2:2005 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 Woven E-glass as specif
31、ied in IEC 61249-6-3: Woven E-glass fabric (for the manufacture of prepreg and copper-clad laminate). 3.2 Resin system The resin consists of a majoriity multifunctional epoxide resin with an E-glass transition temperature of 150 C when cured according the manufacturers recommendation. Contrast agent
32、s may be added to enhance processing such as automated 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 im
33、pact 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 2V01 (under consideration). 4.1.1 Dewetted areas (fish eyes) Dewetted areas with a diameter 10 mm are n
34、ot permissible. Dewetted areas with a diameter 10 mm are permitted to the extent of a maximum 10 fish eyes in any 300 300 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 acceptability but
35、 also the flow characteristic of the prepreg must 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) of IEC 61189-2, t
36、he distortion or non-perpendicular orientation of the fill or weft 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
37、 yarns are exposed due to loss of resin are not permitted. Licensed Copy: Wang Bin, na, Thu Apr 20 02:42:30 BST 2006, Uncontrolled Copy, (c) BSIEN 61249-4-2:2005 6 4.1.5 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 b
38、y more than 2 mm. 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
39、be used as qualification 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 restri
40、cted to the glass 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)
41、 Scaled flow thickness (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 or 2C10 of IEC 61189-2, the nominal resin content shall be as agreed upon between the user and supplier. The tole
42、rance around the ordered 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 3 %, e.g.
43、 (350 10,5) g. 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 5 %, e.g. (25 5) %. Licensed Copy: Wang Bin, na, Thu Apr 20 02:42:30 B
44、ST 2006, Uncontrolled Copy, (c) BSI 7 EN 61249-4-2:2005 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
45、test method 2C09 of IEC 61189-2, the nominal melt viscosity shall be as agreed upon between the user and supplier. The tolerance around the ordered nominal value shall be 20 m Pa s, e.g. (240 20) m Pa s. 4.2.6 Gel time When tested in accordance with test method 2C02 of IEC 61189-2, the nominal gel t
46、ime shall be as agreed upon between the user and supplier. The tolerance around the ordered nominal value shall be 20 s, e.g. (160 20) s. 4.2.7 Volatile content When tested in accordance with test method 2C04 of IEC 61189-2, the volatile content shall be 0,5 % maximum. 4.3 Properties related to prep
47、reg 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 recommendations whereupon the thickness shall be determined using a micrometer. When tested in accordance with test method 2E11
48、 (under consideration) of IEC 61189-2, the minimum electric strength 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 shall be bonded together and cured in accordance with the manufacturers recommendations. The number of plies shall be cho
49、sen so that a specimen thickness of approximately (0,40,5) mm is obtained as measured with a micrometer. When tested in accordance with test method 2C06 of IEC 61189-2, the flammability shall be as shown in Table 1. Licensed Copy: Wang Bin, na, Thu Apr 20 02:42:30 BST 2006, Uncontrolled Copy, (c) BSIEN 61249-4-2:2005 8 Table 1 Flammability Property Requirement Designation Flammability (vertical burning test) (nominal ma
