1、BRITISH STANDARD BS EN 61249-3-5:1999 IEC 61249-3-5: 1999 Materials for printed boards and other interconnecting structures Part3-5: Sectional specification set for unreinforced base materials, clad and unclad (intended for flexible printed boards) Transfer adhesive films for flexible printed boards
2、 The European Standard EN61249-3-5:1999 has the status of a BritishStandard ICS 31.180BSEN61249-3-5:1999 This BritishStandard, having been prepared under the directionof the Electrotechnical Sector Committee, was publishedunder the authorityofthe Standards Committee and comes into effect on 15June19
3、99 BSI 03-2000 ISBN 0 580 32526 1 National foreword This BritishStandard is the English language version of EN61249-3-5:1999. It is identical with IEC61249-3-5:1999. The UK participation in its preparation was entrusted to Technical Committee EPL/501, Electronic assembly technology, which has the re
4、sponsibility 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 the UK interests informed; monitor related international and European developments and promulgate them in the UK.
5、A list of organizations 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 number
6、ing system to the 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
7、 BritishStandards which implement international or European publications referred to in this document 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 Br
8、itish Standard does not purport to include 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 fr
9、ont cover, an inside front cover, pagesi andii, theEN title page, pages2 to12 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 A
10、md. No. Date CommentsBSEN61249-3-5:1999 BSI 03-2000 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 61249-3-5 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61249-3-5 April 1999 ICS 31.180 English version Materials for printed boards and other interconnectin
11、g structures Part3-5: Sectional specification set for unreinforced base materials, clad and unclad (intended for flexible printed boards) Transfer adhesive films (IEC61249-3-5:1999) Matriaux pour circuits imprims et autres structures dinterconnexion Partie3-5: Collection de spcifications intermdiair
12、es pour les matriaux de base non renforcs, recouverts ou non (prvus pour les ciruits imprims flexibles) Films transfert de colle (CEI61249-3-5:1999) Materialien fr Leiterplatten und andere Verbindungsstrukturen Teil3-5: Rahmenspezifikation fr unverstrkte, kaschierte und unkaschierte Basismaterialien
13、 (fr flexible Leiterplatten) Transfer-Kleberfilme fr flexible Leiterplatten (IEC61249-3-5:1999) 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 conditions for giving this European Standard
14、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 in three official versions (English, French,
15、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 electrotechnical committees of Austria, Belgium, Czec
16、h 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 Normalisation Electrotechnique Europisches Komitee
17、 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. EN61249-3-5:1999 EEN61249-3-5:1999 BSI 03-2000 2 Foreword The text of document52/774/FDIS, futu
18、re edition1 of IEC61249-3-5, prepared by IEC TC52, Printed circuits, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN61249-3-5 on1999-04-01. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “inform
19、ative” 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 IEC61249-3-5:1999 was approved by CENELEC as a European Standard without any modification. Contents
20、 Page Foreword 2 1 Scope 3 2 Normative references 3 3 Materials and construction 3 4 Internal marking 3 5 Designation 4 6 Properties of adhesive films 4 7 Dimensions and tolerances 6 8 Packaging and marking 6 9 Acceptance testing 7 Annex A (informative) Conversion table for test method reference num
21、bers 8 Annex ZA (normative) Normative references to international publications with their corresponding European publications 12 Table 1 Electrical properties 5 Table 2 Properties related to the copper foil bond 5 Table 3 Flammability 5 Table 4 Adhesive flow 6 Table 5 Tolerances for the width of fil
22、m material supplied in rolls 6 latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2000-01-01 latest date by which the national standards conflicting with the EN haveto be withdrawn (dow) 2002-01-01EN61249-3-5:19
23、99 BSI 03-2000 3 1 Scope This part of IEC61249 gives requirements for transfer adhesive films for use in the fabrication of flexible multilayer boards or flex-rigid printed boards. 2 Normative references The following normative documents contain provisions which, through reference in this text, cons
24、titute 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 investigate the possibility of applying the most recent editions of t
25、he normative documents listed below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC60249-1:1982, Base materials for printed circuits Part1: Test methods. IEC60249-2-8:1987, Base materials for printed circuits Part2: Specifications Specification No.8: Flexib
26、le copper-clad polyester (PETP) film. IEC60249-2-13:1987, Base materials for printed circuits Part2: Specifications Specification No.13: Flexible copper-clad polyimide film, general purpose grade. IEC60249-2-15:1987, Base materials for printed circuits Part2: Specifications Specification No.15: Flex
27、ible copper-clad polyimide film of defined flammability. IEC61189-2:1997, Test methods for electrical material interconnection structures and assemblies Part2: Test methods for materials for interconnection structures. 3 Materials and construction The materials consist of adhesive layers based on B-
28、staged epoxide, acrylic or polyester (PET) resin supported by a removable paper carrier and protected by a polymeric release film which shall adhere until lamination. The adhesive on epoxide or acrylic base shall be compatible with the copper-clad polyimide films according to IEC60249-2-13 and IEC60
29、249-2-15; the adhesive on polyester (PET) base shall be compatible with the copper-clad polyester films according to IEC60249-2-8. The thickness of the adhesive films shall be between12,54m and754m, with a permissible tolerance of 20% when measured by the method of3.14 of IEC60249-1, provided that t
30、he micrometer used is capable of resolving0,002mm or better. Preferred thicknesses are254m and504m. Other thicknesses may be used by agreement between purchaser and supplier. The thickness of the adhesive film is defined as follows: T a = T t T p Thickness values T tand T pshall be measured as descr
31、ibed in3.14 of IEC60249-1. 4 Internal marking Not applicable. where T a is the thickness of the adhesive film; T t is the average value of the total thickness of the material under test, including the paper carrier and protective material; T p is the average value of the thickness of the paper carri
32、er and protective material.EN61249-3-5:1999 4 BSI 03-2000 5 Designation The following code shall be used to designate adhesive films according to this specification: If there is no risk of confusion, the designation may be abbreviated to read (the same example as above): E-IEC-12,5. 6 Properties of
33、adhesive films 6.1 Appearance The adhesive film shall be free from blisters and wrinkles. There shall be no imperfections which will be detrimental to the material properties or to their intended use. The film shall be uniform in colour and free from foreign inclusions. Colour degradation shall not
34、occur when the film is processed in accordance with the manufacturers instructions. The appearance of the adhesive film shall only be inspected with protective material present in cases where the protective material is transparent. Where foreign inclusions appear to be imbedded in the adhesive and/o
35、r between the adhesive and the protective materials, the protective materials shall be removed and the adhesive film shall be re-inspected. 6.2 Properties of adhesive films after curing 6.2.1 Preparation of laminated specimens In order to determine the properties listed in6.2.2 and6.2.3, laminated s
36、amples shall be prepared as follows. 6.2.1.1 Specimens from cover sheets Test specimens, unless for peel strength or heat shock testing, shall comply with the requirements of IEC60249-1. They shall be cut from a set of samples prepared by laminating copper foil to the film material under test. Lamin
37、ating conditions should be agreed upon between purchaser and supplier and should comply with the material manufacturers recommendations regarding pressure, temperature and pressing duration. The copper foil, as used in the fabrication of copper-clad laminates, shall have a thickness of354m(305g/m 2
38、) and shall be applied with the untreated (shiny) side to the adhesive layer. Samples for peel strength or heat shock testing shall be prepared by laminating with a single-sided epoxide/glass laminate on one side of the adhesive film, and with unclad epoxide/glass laminate on the second side. The mi
39、nimum thickness of the unclad laminate shall be0,5mm. In all other respects, sample preparation shall be as detailed above. If any argument arises in relation to the laminating conditions, it is desirable to apply the standard procedures and conditions in the relevant test method specification (see
40、IEC61189-2) by agreement between purchaser and supplier.EN61249-3-5:1999 BSI 03-2000 5 6.2.2 Electrical properties Table 1 Electrical properties 6.2.3 Non-electrical properties 6.2.3.1 Properties related to the copper foil bond Table 2 Properties related to the copper foil bond 6.2.3.2 Flammability
41、Table 3 Flammability 6.2.3.3 Water absorption Not specified. 6.3 Other properties before curing 6.3.1 Dimensional stability Not specified. Property Test method (subclause of IEC60249-1) Requirement Surface resistance after damp heat while in the humidity chamber (optional) 2E03 10 3M7 min. Surface r
42、esistance after damp heat and recovery 2E03 10 4M7 min. Volume resistivity after damp heat while in the humidity chamber (optional) 2E04 10 3M7m min. Volume resistivity after damp heat and recovery 2E04 10 4M7m min. Surface corrosion 2E08 No visible corrosion products in the gap Relative permittivit
43、y after damp heat and recovery (optional) 2E10 4,5 max. Dielectric dissipation factor after damp heat and recovery (optional) 2E10 0,05 max. Electrical strength 2E11 60 kV/mm min. Property Test method IEC61189-2 Requirement Acrylic or epoxide base Polyester base Peel strength as received 2M13 Not le
44、ss than 0,7 N/mm Not less than 0,8 N/mm Peel strength after heat shock of 10s 2M14 Not less than 0,6 N/mm Not less than 0,6 N/mm Peel strength after dry heat at125 C (optional) 2M17 Not less than0,35 N/mm Not applicable Blistering after10s heat shock 2P02 As agreed upon between supplier and purchase
45、r Property Test method IEC61189-2 Requirement Flammability of films504m thick or greater when used in combination with material specified in IEC61249-3-2 a 2C08 As agreed upon between supplier and purchaser or that the flammability rating of the base material (IEC61249-3-2) is not increased a Under
46、consideration.EN61249-3-5:1999 6 BSI 03-2000 6.3.2 Adhesive flow during lamination Table 4 Adhesive flow 6.3.3 Volatile content Not specified. 7 Dimensions and tolerances Transfer adhesive films are delivered only in rolls as manufactured or in rolls slit to a specified width as ordered by the purch
47、aser. The materials shall be wound firmly but not tightly on cores having an internal diameter not less than75mm. The standard length of the rolls shall be50m,75m or100m. The delivered length shall not be less than the nominal length. The tolerance from the nominal width of material supplied in roll
48、s shall not exceed the following values. Table 5 Tolerances for the width of film material supplied in rolls The maximum number of splices in any roll shall be three. The splices shall be marked with a flag at one of the end-planes of the roll. 8 Packaging and marking 8.1 Packaging The rolls of tran
49、sfer adhesive film shall be adequately packed in cases or crates in order to avoid damage and contamination during transport and storage. 8.2 Marking Each roll and each case or crate shall be marked with a label containing the following data: a) manufacturers name; b) adhesive identification; c) nominal thickness of the adhesive; d) flammability; e) batch number and/or roll number; f) length and width of the roll; g) manufacturing date. This information may be incorporated into the manufacturers reference c
