1、BRITISH STANDARD BS EN 61249-8-7:1997 IEC 1249-8-7: 1996 Materials for interconnection structures Part 8: Sectional specification set for non-conductive films and coatings Section 7: Marking legend inks The European Standard EN 61249-8-7:1996 has the status of a British Standard ICS 31.180BSEN 61249
2、-8-7:1997 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15 March 1997 BSI 01-1999 The following BSI references relate to the work on this standard: Committee referen
3、ce EPL/52 Draft for comment 93/210556 DC ISBN 0 580 27318 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee EPL/52, Printed circuits, upon which the following bodies were represented: Federation of the Electronics Industr
4、y GAMBICA (BEAMA Ltd.) National Supervising Inspectorate (BSI PC) Printed Circuit Interconnection Federation Surface Mount and Related Technologies (SMART Group) Amendments issued since publication Amd. No. Date CommentsBSEN 61249-8-7:1997 BSI 01-1999 i Contents Page Committees responsible Inside fr
5、ont cover National foreword ii Foreword 2 Text of EN 61249-8-7 3 List of references Inside back coverBSEN 61249-8-7:1997 ii BSI 01-1999 National foreword This British Standard has been prepared by Technical Committee EPL/52, and is the English language version of EN 61249-8-7:1996 Materials for inte
6、rconnection structures Part 8: Sectional specification set for non-conductive films and coatings Section 7: Marking legend inks, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 1249-8-7:1996 published by the International Electrotechnical
7、Commission (IEC). This British Standard is published under the direction of the Electrotechnical Sector Board whose Technical Committee EPL/52 has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on interpretation,
8、 or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL.
9、A British 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. Cross-references Publication referred to
10、Corresponding British Standard EN 60068-2-2 (IEC 68-2-2:1974) BS EN 60068 Environmental testing BS EN 60068-2 Test methods BS EN 60068-2-2:1993 Tests B. Dry heat HD 323.2.3 S2 (IEC 68-2-3:1969) BS 2011 Environmental testing Part 2.1: Tests PArt 2.1Ca:1977 Test Ca. Damp heat, steady state HD 323.2.20
11、 S3 (IEC 68-2-20:1979) Part 2.1T:1981 Test T. Soldering HD 323.2.38 S1 (IEC 68-2-38:1974) Part 2.IZ/AD:1997 Test Z/AD. Composite temperature/humidity cycle test IEC 326-2 BS 6221 Printed wiring boards Part 2:1991 Methods of test Summary of pages This document comprises a front cover, an inside front
12、 cover, pages i and ii, theEN title page, pages 2 to 12, an inside back cover 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 theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROP
13、ISCHE NORM EN 61249-8-7 August 1996 ICS 31.18O Descriptors: Materials for interconnection structures, sectional specification, non-conductive films, coatings, marking legend inks, requirements English version Materials for interconnection structures Part 8: Sectional specification set for non-conduc
14、tive filmsand coatings Section 7: Marking legend inks (IEC 1249-8-7:1996) Matriaux pour les structures dinterconnexion Partie 8: Collection des spcifications intermdiaires pour films non conducteurs et revtements Section7: Encres de marquage (CEI 1249-8-7:1996) Materialien fr Verbindungsstrukturen T
15、eil 8: Rahmenspezifikationen fr nichtleitende Folien und Beschichtungen Abschnitt 7: Beschriftungslacke (IEC 1249-8-7:1996) This European Standard was approved by CENELEC on 1996-07-02. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for g
16、iving 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 member. This European Standard exists in three officia
17、l 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. CENELEC members are the national electrotechnical committ
18、ees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europ
19、isches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 61249-8-7:1996 EEN61249-8-7:1996 BSI 01-1999 2 Foreword The text of document 52/603/FDIS, future edition 1 of IEC 1249-8-7, prepared by IEC TC 5
20、2, Printed circuits, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN61249-8-7 on 1996-07-02. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this
21、standard, Annex ZA is normative and Annex A and Annex B are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 1249-8-7:1996 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 Scope 3 2 Norma
22、tive references 3 3 Requirements 3 3.1 Storage properties 3 3.2 Containers and their markings 3 3.3 Adhesion (pressure sensitive tape method) 3 3.4 Resistance to solvents, fluxes and soldering 3 3.5 Degree of cure 3 3.6 Abrasion resistance (pencil hardness) 3 3.7 Flammability 3 3.8 Thermal shock 4 3
23、.9 Solderability 4 3.10 Environmental 4 Annex A (informative) Conversion table 6 Annex B (informative) Bibliography 11 Annex ZA (normative) Normative references to international publications with their corresponding European publications 12 Table 1 Thermal shock test conditions 4 Table 2 Insulation
24、resistance test conditions 5 Table 3 High temperature storage test conditions 5 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-04-01 latest date by which the national standards conflicting with the EN
25、have to be withdrawn (dow) 1997-04-01EN61249-8-7:1996 BSI 01-1999 3 1 Scope This specification details requirements for the qualification of marking inks used for legends and other identifications used on printed boards. Information in this specification will also provide guidance regarding the suit
26、ability of printed boards which feature marking inks. Requirements for the release of products using marking inks should be included in the customer detail specification (CDS). 2 Normative references The following normative documents contain provisions which, through reference in this text, constitu
27、te provisions of this section of IEC 1249-8. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this section of IEC 1249-8 are encouraged to investigate the possibility of applying the most recent edition
28、s of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 68-2-2:1974, Environmental testing Part 2: Tests. Test B: Dry Heat. IEC 68-2-3:1969, Basic environmental testing procedures Part 2: Tests Test Ca: Damp heat, steady
29、 state. IEC 68-2-20:1979, Environmental testing Part 2: Tests Test T: Soldering. IEC 68-2-38:1974, Basic environmental testing procedures Part 2: Tests Test Z/AD: Composite temperature/humidity cyclic test. IEC 326-2:1990, Printed boards Part 2: Test methods. 3 Requirements 3.1 Storage properties Le
30、gend marking inks, or their component compounds, when stored in their original sealed containers under the suppliers specified environmental conditions, shall retain the specified properties until the final date for use see 3.2 b). 3.2 Containers and their markings The legend marking ink shall be su
31、pplied in sound, clean, dry containers. In addition to any statutory markings, each container in the consignment shall be clearly marked with the following: a) the type; b) the specified storage temperature and humidity, or range thereof, and a final date for use; c) details of mixing and curing con
32、ditions; d) a distinct lot or batch number, and date of manufacture; e) the quantity in the container; f) the identity of the manufacturer, and place of manufacture. 3.3 Adhesion (pressure sensitive tape method) The material shall be tested in accordance with future IEC 1189-3 1) , test 3X12. When p
33、rocessed in accordance with the material suppliers instructions, there shall be no evidence of marking ink adhering to the tape. There shall be no separation between the marking ink and the underlying materials. 3.4 Resistance to solvents, fluxes and soldering The cured legend marking ink shall not
34、exhibit any degradation in surface characteristics, such as surface roughness, swelling, blistering, softening, changes of colour, or loss of adhesion when tested in accordance with test method 3C04 of future IEC1189-3, including the soldering operation. The flux shall be an activated flux (0,2 %) a
35、s specified in6.6.2 of IEC 68-2-20. The test specimen shall be a production board, as agreed between customer and supplier. Three samples shall be taken. 3.5 Degree of cure When tested in accordance with future IEC 1189-3, test 3M09, there shall be no softening or transfer of the material (other tha
36、n free surface debris) to the lint-free cloth or cotton wool swab. 3.6 Abrasion resistance (pencil hardness) The hardness of the cured legend marking ink shall be determined by the pencil test in accordance with future IEC 1189-3, test 3M08. The ink supplier shall report the limits of hardness that
37、can be expected when the legend marking ink is properly applied and cured. When agreed upon between the customer and supplier, specific requirements regarding hardness shall be met, but in no case shall be less than 2H. 3.7 Flammability The addition of a coating of legend marking ink to a printed bo
38、ard shall not reduce the flammability rating (for example: FV-0, FV-1) of the printed board substrate material. 1) See Annex B (Bibliography).EN61249-8-7:1996 4 BSI 01-1999 3.8 Thermal shock The marking legend ink coated test specimen shall be preconditioned in accordance with future IEC1189-1 2) ,
39、test 1P02, for a minimum of 1 h and a maximum of 4 h. The flux shall be an activated flux(0,2 %) as specified in 6.6.2 of IEC 68-2-20. The test specimen shall not exhibit charring, contamination, softening, or lifting when tested by thermal shock. Lifting is allowable for class 1 and class 2 product
40、s. The test methods, temperatures and times shall be as specified in Table 1. Table 1 Thermal shock test conditions 3.8.1 Test specimens Three test specimens, with the marking legend ink coating applied and cured as recommended by the manufacturer, shall be evaluated. 3.9 Solderability The marking l
41、egend ink coating process shall not adversely affect the desired solderability of the printed board, as a result of marking legend bleeding or other contamination, when tested according to test 3X07 of future IEC 1189-3, using an activated flux (0,2 %) as specified in 6.6.2 of IEC68-2-20. 3.9.1 Test
42、 specimens Three test specimens, with the marking legend ink coating applied and cured as recommended by the manufacturer, shall be evaluated. 3.10 Environmental The production printed boards or test specimens shall be cleaned, handled, and stored so that, at the time of coating the marking legend i
43、nk in preparation for environmental testing, the boards or test specimens shall meet the cleanliness requirements. 3.10.1 Insulation resistance The marking legend ink coated printed boards shall have a minimum resistance as specified in the customer detail specification when tested according to test
44、 3E03 of future IEC 1189-3. 3.10.1.1 Test specimens Three test specimens, with the marking legend ink coating applied and cured as recommended by the manufacturer, shall be evaluated. These specimens may also be used for evaluation described in 3.10.2. The referee test shall be performed using a com
45、pletely coated coupon “E” from the composite test pattern in future IEC 326-6-1 2) . 3.10.2 Insulation resistance The insulation resistance of the marking legend coated test board shall be subjected to the conditions of the relevant class, and tested according to test method 3E03 of future IEC 1189-
46、3. The test conditions and minimum requirements for the relevant classes are specified in Table 2. Class Test method Future IEC 1189-3 Time 1 2 3 3N02 3N02 3N05 5 5 10 2) See Annex B (Bibliography)EN61249-8-7:1996 BSI 01-1999 5 Table 2 Insulation resistance test conditions 3.10.2.1 Test specimens Th
47、ree test specimens, with marking legend coating applied and cured as recommended by the manufacturer, shall be evaluated (3.10.1.1). The referee test shall be performed using coupon “E” from the composite test pattern in future IEC 326-6-1. 3.10.3 High temperature storage The marking legend ink coat
48、ed test specimen shall not exhibit blistering or delamination of the marking legend when exposed to the conditions according to Table 3. Table 3 High temperature storage test conditions 3.10.3.1 Test specimens Three test specimens, with the marking legend ink coating applied and cured as recommended
49、 by the manufacturer, shall be evaluated. Class Test conditions Time Polarizing voltage (d.c.) Minimum requirement in chamber Minimum requirement after recovery days V MW W MW W 1 IEC 68-2-3 Test Ca, steady state % RH (402)C 10 100 100 1000 2 IEC 68-2-3 Test Ca, steady state% RH(402)C 21 100 100 1000 3 IEC 68-2-3 Test Ca, steady state% RH (402)C 56 100 500 5000 IEC 68-2-38 Test Z/AD, cyclic (8096)% RH(2565)C 10 cycles of 24 h duration, excluding sub-zero temperatures 100 500 5000 NOTEOne of the two methods
