1、BRITISH STANDARD Materials for printed BS EN 6124933:1999 IEC 6 1249-3-3: 1999 boards and other interconnecting structures - Part 3-3: Sectional specification set for unreinforced base materials, clad and unclad (intended for flexible printed boards) - Adhesive coated flexible polyester film The Eur
2、opean Standard EN 61249-331999 has the status of a British Standard ICs 31.180 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN bLZq9-3-3-ENGL 1779 m Lb2Lfbb7 0782b40 52b direction of the Electrotechnicai Sector Committee, was published under the authority of the
3、Standards Committee and comes into effect on 15 June 1999 hd. No. BS EN 6124933:1999 Da Comments National foreword O BSI -1999 ISBN O 680 32633 4 This Brijsh Standard is the English language version of EN 6124W1999. It is identical with IEC 6124433:1999. The UK participation in its prepamixon was en
4、trusted to Technical Committee EPM01, Electronic assembly technology, which has the responsibility to: - aid enquire= to undemtand the te% - present to the responsible internationaVEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests iIlfOrIned,
5、- monitor related international and European developments and promulgate them in the UK. A list of organmiions represented on this committee can be obtained on request to its secretary. bm 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has
6、been renumbered as IEC 60027-1. For a period of time during the change over from one numbering 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 r
7、eferences to international publications with their corresponding European Publications. The British Standards which implement these internationai or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index“, or by usin
8、g the “Find“ facility of the BSI standards Electronic Catalogue. A British Standard does not purport to include ail the necessary provisions of a contract Usem of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity fr
9、om legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 14, an inside back cover and a back cover. EUROPEAN STANDARD NORME EUROPEENNE EUROPISCHE NORM EN 61 249-3-3 April 1999 ICs 31.180 English version Materials for printed b
10、oards and other interconnecting structures Part 3-3: Sectionai specification set for unreinforced base materials, clad and unclad (intended for flexible printed boards) Adhesive coated flexible polyester film (IEC 6 1 249-3-3: 1 999) Matriaux pour circuits imprims et autres structures dinterconnexio
11、n Partie 3-3: Collection de spcifications intermdiaires pour les matriaux de base non renforcs, recouverts ou non (prvus pour les circuits imprims flexibles) - Film flexible de polyester recouvert de colle (CE1 61 249-3-3:1999) Materialien fr Leiterplatten und andere Verbindungsstrukturen Teil 3-3:
12、Rahmenspetifikation fr unverstrkte, kaschierte und unkaschierte Basismaterialien (fr flexible Leiterplatten) Kleberbeschic htete flexible Polyesterfolien (IEC 61 249-3-3: 1 999) This European Standard was approved by CENELEC on 1999-04-01. CENELEC members are bound to comply with the CENICENELEC Int
13、ernal 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 to any CENELEC
14、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 versions. CEN
15、ELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical
16、 Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee 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. EN 6124
17、9-3-3:1999 E STD-BSI BS EN bL247-3-3-ENGL 1999 lb24bb9 0782b112 3T9 Page 2 EN 61249-3-3:1999 Foreword The text of document 52/790/FDIS, future edition 1 of IEC 61249-3-3, prepared by IEC TC 52, Printed circuits, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61 249-
18、3-3 on 1999-04-01. The following 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 with the EN have to be withdrawn (d Op) 2000-0 1 -0 1 (dow) 2002-01 -01 - latest date by which the national stan
19、dards conflicting Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ 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 Internati
20、onal Standard IEC 61 249-3-3:1999 was approved by CENELEC as a European Standard without any modification. STD-BSI BS EN bLZY9-3-3-ENGL 1777 Lb24bb9 0782bY3 235 Page 3 EN 61249-3-3:1999 CONTENTS Clause Page Scope 4 Normative references . 4 Materials and construction 4 Internal marking . 5 Properties
21、 of adhesive coated polyester films :. . 6 Dimensions and tolerances 9 Packaging and marking . 9 Designation 6 Acceptance testing . 9 Annex A (informative) Conversion table for test method reference numbers . 10 Annex ZA (normative) Normative references to international publications with their corre
22、sponding European publications 14 O BSI 06-1999 Page 4 EN 61249-3-3:1999 MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES - Part 3-3: Sectional specification set for unreinforced base materials, clad and unclad (intended for flexible printed boards) - Adhesive coated flexible polyes
23、ter film 1 Scope This specification gives requirements for flexible polyester (PETP) films coated on one side or both with polyester, acrylic or epoxide type adhesive for use in the fabrication of flexible printed wiring. Films coated on only one side are used as a coverlay or covercoat in the fabri
24、cation of flexible printed wiring. This coverlay or covercoat is also used to provide local support to areas subjected to mechanical or environmental stress. Films coated on both sides are used as bonding films in the fabrication of printed boards. 2 Normative references The following normative docu
25、ments contain provisions which, through reference in this text, constitute provisions of this pari of IEC 61249. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 61249 are encouraged to i
26、nvestigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 60249-1 :198
27、2, Base materials for printed circuits - Part I: Test methods IEC 61 189-2: 1997, Test methods for electrical materials, interconnection structures and assemblies - Pari 2: Test methods for materials for interconnection structures 3 Materials and construction The material consists of an insulating f
28、lexible film base of polyester (PET) coated with an adhesive on one side or both sides. 3.1 Insulating film Polyester films of preferred thicknesses and permitted tolerances are given in table 1 when measured by the method of 3.14 of IEC 60249-1, provided that the micrometer used is capable of resol
29、ving 0,002 mrn or better. STD-BSI BS EN bL299-3-3-ENGL 1999 Lb24bbS 0782b45 O08 Page 5 EN 61249-3-3:1999 1 O0 125 Other thicknesses may be used by agreement between purchaser and supplier. The maximum permitted tolerances of such thicknesses shall be those of the nearest greater thickness stated in
30、table 1. Table 1 - Preferred thicknesses and maximum permitted tolerances i1 o I1 o Nominal thickne80 (without idharive) _ Maximum permlttod tolerance it any mearured point I iim I % I20 I 25 I 50 75 11 5 I1 o The adhesive shall be compatible with the copper-clad polyester film. Relevant adhesives a
31、re B-staged adhesives based on polyester, acrylic or epoxide resin. The thickness of the adhesive is defined as follows: where TB is the thickness of the adhesive; i, is the average value of the total thickness of the adhesive coated film under test; Tf is the average value of the thicknesses of the
32、 insulation film under test without adhesive. Thickness values T, and Tf shall be measured as described in 3.1 The thickness of the adhesive shall be between 12,5 pm and 75 pm with a permissible tolerance of 120 %. Preferred thicknesses are 20 pm, 25 pm, 38 pm, 50 pm and 75 pm. 4 Internal marking No
33、t applicable. Page 6 EN 61249-3-3:1999 5 Designation The following code shall be used to designate adhesive coated polyester films according to this specif ication: Example: PET - IEC-61249-3-3 - A - 25 - 50 - O - FV1 film material _I specification no. type of adhesive (A = acrylic, E = epoxide, P =
34、 polyester) I II adhesive thickness on side 1 (mm) film thickness (mm) adhesive thickness on side 2 (mm) Flammability rating specification -1 If there is no risk of confusion, the designation may be abbreviated to read (the same example as above): PET- IEC-P-25-50-0. 6 Properties of adhesive coated
35、polyester films 6.1 Appearance The adhesive coated 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 sh
36、all not occur when the film is processed in accordance with the manufacturers instructions. . The adhesive shall be protected by a polymeric release film or release paper which shall adhere until lamination. For polyester films with adhesive on both sides, one adhesive layer or both shall be protect
37、ed with such release materials. The appearance of the adhesive coated film shall only be inspected with the release material present in cases where the release material is transparent. Where foreign inclusions appear to be imbedded in the adhesive and/or between the adhesive and the polyester film,
38、the release material shall be removed and the coated film shall be re-inspected. 6.2 Properties of adhesive coated polyester films after curing 6.2.1 Preparation of laminated specimens In order to determine the properties listed in 6.2.2 and 6.2.3, laminated specimens shall be prepared as follows. S
39、TDmESI BS EN bi247-3-3-ENGL 1199 D LbZLlbb7 fl782b47 980 D Page 7 EN 61249-3-31999 Property Teat method (IEC 81189-2) 6.2.1.1 Specimens from cover sheets Test specimens shall comply with the requirements of IEC 61 189-2 (see annex A). They shall be cut from a set of samples prepared by laminating co
40、pper foil to the film material under test. Laminating 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 l
41、aminates, shall have a thickness of 35 pm (305 g/m2) and shall be applied with the untreated (shiny) side to the adhesive layer. Requirement 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 sp
42、ecification (see 61 189-2) by agreement between purchaser and supplier. NOTE - When the release or protective materials are peeled off from coverlay films with punched holes andlor slits for further fabrication processes, careful attention should be paid In order to avoid deformation of the film due
43、 to any excessive peeling force. 6.2.1.2 Specimens from bonding films The required test specimens, according to the relevant clause of IEC 61189-2, shall be cut from a set of samples prepared by laminating copper foils to both sides of the film material under test as described in 6.2.1.1, except for
44、 peel strength and heat shock testing. Surface resistance after damp heat while in the humidity chamber (optional) Surface resistance after damp heat and recoverv , For peel strength and heat shock testing, the samples shall be prepared by laminating a single- sided copper-clad epoxide/glass laminat
45、e on one side of the adhesive coated bonding film, and an unclad epoxideiglass laminate with a thickness not less than 0,5 mm on the other side, as described in 6.2.1.1. Two sets of samples shall be prepared: one with the copper foil facing side 1 of the bonding film, one with the copper foil facing
46、 side 2 of the bonding film. 2E12 1 O MR min. 2E03 IO4 MR min. Volume resistivity after damp heat and recovery Surface corrosion 2E04 10 MRm min. 2E08 No visible corrosion products in the gap Volume resistivity after damp heat while in I 2E04 I lo3 MRm min. I the hurnidttv chamber ootional) 1 2E10 I
47、 43 max. Relative permittivity after damp heat and I recovery (optional) Dielectric dissipation factor after damp I 2E10 I 0,05 max. I heat and recovery (optional) I Electrical strength I 2E11 I 60 kV/mm min. I STD-BSI BS EN bLZV9-3-3-ENGL 1997 E Lb2Libbi 0782b4cT dL7 R Page 8 EN 61249-3-3:1999 Prop
48、erty 6.2.3 Non-electrical properties Tost method Requirement Peel strength as received 2M13 Peel strength after thermal shock 2M14 of 10s Blistering after 1 O s thermal shock 2C05 Not less than 0,7 N/mm Not less than 0,6 N/mm No blisterina or delamination 6.2.3.2 Flammability Not applicable. Propert
49、y 6.2.3.3 Water absorption Not specified. Teat method Requirement (IEC 61 180-21 6.3 Other properties before curing Dimensional change due to careful peeling off of reiease/protective materials Dimensional change due to heating at (I 50 * 2) OC 6.3.1 Dimensional stability (coverlays only) 2x02 2,5 pm/rnm max. in either direction 2x02 (process step 2 only) 5,O pm/mm max. in either direction Table 4 - Dimensional stability of coverlays 6.3.2 Adhesive flow during lamination Table 5 - Adhesive flow STD-ES1 EIS EN b1249-3-3-ENGL 1999 R Lb24bb7
