1、 INTERNATIONAL STANDARD IEC 61249-4-2First edition 2005-09Materials 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 flammability Reference number IEC 61249-4-2:2005(E)
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8、c.ch Tel: +41 22 919 02 11 Fax: +41 22 919 03 00 INTERNATIONAL STANDARD IEC 61249-4-2First edition 2005-09Materials 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 fla
9、mmability IEC 2005 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, ru
10、e de Varemb, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch M For price, see current catalogue PRICE CODE Commission Electrotechnique Internationale International Electrotechnical Commission 2 61249-4-2 IEC:2005(E
11、) CONTENTS FOREWORD.3 1 Scope.5 2 Normative references .5 3 Materials and construction6 3.1 Reinforcement.6 3.2 Resin system.6 4 Properties.6 4.1 Properties related to the appearance of the prepreg 6 4.2 Properties related to B-stage prepreg7 4.3 Properties related to prepreg after curing 8 5 Delive
12、ry form 9 5.1 Rolls9 5.2 Sheets.10 5.3 Cut panels.10 6 Quality assurance.10 6.1 Quality system.10 6.2 Responsibility for inspection 10 6.3 Qualification inspection .10 6.4 Quality conformance inspection.10 6.5 Certificate of conformance.10 6.6 Safety data sheet 11 7 Packaging and marking 11 8 Shelf
13、life.11 9 Ordering information.11 Table 1 Flammability9 61249-4-2 IEC:2005(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES Part 4-2: Sectional specification set for prepreg materials, unclad Multifunctional epoxide woven E-glass prep
14、reg of defined flammability FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions conce
15、rning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Thei
16、r preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates c
17、losely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the rel
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21、for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical comm
22、ittees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publicati
23、ons. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of pate
24、nt rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61249-4-2 has been prepared by IEC technical committee 91: Electronics assembly technology. The text of this standard is based on the following documents: FDIS Report on voting 91/5
25、26/FDIS 91/536/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 61249-4-2 IEC:2005(E) IEC 61249-4 consists of the following pa
26、rts, under the general title Materials for printed boards and other interconnecting structures Part 4: Sectional specification set for prepreg materials, unclad Part 4-1: Epoxide woven E-glass prepreg of defined flammability 1Part 4-2: Multifunctional epoxide woven E-glass prepreg of defined flammab
27、ility Part 4-5: Polyimide, modified or unmodified, woven E-glass prepreg of defined flammability Part 4-11: Non-halogenated epoxide, woven E-glass prepreg of defined flammability Part 4-12: Non-halogenated multifunctional epoxide woven E-glass prepreg of defined flammability The committee has decide
28、d that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or
29、 amended. A bilingual version of this publication may be issued at a later date. _ 1Under consideration. 61249-4-2 IEC:2005(E) 5 MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES Part 4-2: Sectional specification set for prepreg materials, unclad Multifunctional epoxide woven E-glass
30、 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 according to IEC 62326-4. This material may b
31、e 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 structure. Afte
32、r 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 references, only the edition cited applies. For u
33、ndated 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 materials for interconnection structures Amendme
34、nt 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 IEC 61249-6-3, Material for interconnec
35、tion structures Part 6-3: Sectional specification set for reinforcement materials Woven E-glass (for the manufacture of prepregs and copper- clad base materials 2IEC 62326-4:1996, Printed boards Part 4: Rigid multilayer printed boards with interlayer connections Sectional specification ISO 9000:2000
36、 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 _ 2In preparation. 6 61249-4-2 IEC:2005(E) 3 Materials and cons
37、truction 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 specified in IEC 61249-6-3: Woven E-glass fabric (for the manufacture of prepreg and copper-clad laminate). 3.2 Resin system Th
38、e resin consists of a majoriity multifunctional epoxide resin with an E-glass transition temperature of 150 C when cured according the manufacturers recommendation. Contrast agents may be added to enhance processing such as automated optical inspection. Its flame resistance is defined in terms of th
39、e 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 for the intended purpose. For the following specific defects, the requirements give
40、n 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 not permissible. Dewetted areas with a diameter 10 mm are permitted to the extent of a maximum 10 fish eyes in any 300 300
41、 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 also the flow characteristic of the prepreg must be taken into consideration. The acceptance conditions for broken filam
42、ents 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, the distortion or non-perpendicular orientation of the fill or weft yarns in the glass fabric shall not exceed 10 % measur
43、ed 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 to loss of resin are not permitted. 61249-4-2 IEC:2005(E) 7 4.1.5 Edge conditions Cut-to-size pane
44、ls shall have even edges and shall not show loss of resin at the edge due to the cutting process by 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
45、 describe thickness, reactivity and rheology of B-stage prepreg. The choice of characteristics to 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 interr
46、elated and should not be specified individually. Ordering requirements should preferably be restricted 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 Thi
47、ckness parameter Resin content (a) Treated weight (a) Reactivity/rheology parameter Resin flow (b) 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
48、61189-2, the nominal resin content shall be as agreed upon between the user and supplier. The tolerance 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 upo
49、n between the user and supplier. The tolerance around the ordered nominal value shall be 3 %, e.g. (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) %. 8 61249-4-2 IEC:2005(E) 4.2.
