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1、BRITISH STANDARD BS EN 61086-2:2004 Incorporating Corrigendum No. 1 Coatings for loaded printed wire boards (conformal coatings) Part 2: Methods of test The European Standard EN 61086-2:2004 has the status of a British Standard ICS 29.035.20 ? Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 0
2、7:38:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61086-2:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 19 May 2004 BSI 2006 ISBN 0 580 43792 2 National foreword This British Standard is the official English language version of
3、EN 61086-2:2004, including Corrigendum January 2005. It is identical with IEC 61086-2:2004. It supersedes BS EN 61086-2:1995 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee GEL/15, Insulating material, to Subcommittee GEL/15/3, Material specifications
4、, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under
5、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 purport to include all the necessary provisions of a contract. Users are responsible for its correct applic
6、ation. Compliance with a British Standard does not of itself confer immunity from legal obligations. 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; mon
7、itor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates wh
8、en the document was last issued. Amendments issued since publication Amd. No. DateComments 15575 Corrigendum No. 1 28 April 2006Corrections to Normative References, Clause 6.1.2, Clause 7.8.1. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:38:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
9、EUROPEAN STANDARD EN 61086-2 NORME EUROPENNE EUROPISCHE NORM April 2004 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2004 CEN
10、ELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61086-2:2004 E ICS 29.035.20 Supersedes EN 61086-2:1994 English version Coatings for loaded printed wire boards (conformal coatings) Part 2: Methods of test (IEC 61086-2:2004) Revtement
11、s appliqus sur les cartes de cblage imprimes (revtements enrobants) Partie 2: Mthodes dessai (CEI 61086-2:2004) Beschichtungen fr bestckte Leiterplatten (conformal coatings) Teil 2: Prfverfahren (IEC 61086-2:2004) This European Standard was approved by CENELEC on 2004-04-01. CENELEC members are boun
12、d 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 bibliographical references concerning such national standards may be obtained on application to the Ce
13、ntral 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 responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same
14、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, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal
15、, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Incorporating Corrigendum January 2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:38:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of document 15C/1546/FDIS, future edition 2 of IEC 61086-2, prepare
16、d by SC 15C, Specifications, of IEC TC 15, Insulating materials, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61086-2 on 2004-04-01. This European Standard supersedes EN 61086-2:1994. This edition, which is presented in a new layout, includes the following signifi
17、cant technical changes from EN 61086-2:1994: a) a new specimen A has been added; b) new cleaning and test procedures have been added. 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
18、 (dop) 2005-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-04-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61086-2:2004 was approved by CENELEC as a European Standard without any modi
19、fication. _ Page 2 EN 610862:2004 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:38:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CONTENTS INTRODUCTION.4 1 Scope.5 2 Normative references .5 3 Test specimens 6 3.1 Specimen A.6 3.2 Specimen B.7 3.3 Specimen C.7 3.4 Specimen D.7 4 Environmen
20、tal exposure of coated specimens 8 4.1 Thermal cycling Method8 4.2 Thermal shock Method .8 4.3 Thermal ageing .8 4.4 Moisture resistance (damp heat) .8 4.5 Salt mist8 4.6 Cold, low air pressure and damp heat (class 3 only)8 5 Test methods (uncured material) 9 5.1 Shelf life9 6 Test methods for elect
21、rical properties (coated samples) .9 6.1 Breakdown voltage9 6.2 High frequency dielectric properties (behaviour at resonance).9 6.3 Insulation resistance .9 7 Test methods for non-electrical properties (coated samples) 10 7.1 Visual examination 10 7.2 Thickness of coating10 7.3 Fluorescence of coati
22、ng 11 7.4 Tackiness (cure level of coating) .11 7.5 Flexibility.12 7.6 Flammability12 7.7 Mould growth.12 7.8 Resistance to organic solvents 13 7.9 Coating removal 13 Annex A (normative) Specimen of coating material 17 Annex ZA (normative) Normative references to international publications with thei
23、r corresponding European publications .19 Page 3 EN 610862:2004 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:38:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTRODUCTION This International Standard forms part of a series under the general title Coatings for loaded printed wire boards (
24、conformal coatings). The series consists of three parts: Part 1: Definitions, classification and general requirements (IEC 61086-1) Part 2: Methods of test (IEC 61086-2) Part 3: Specifications for individual materials (IEC 61086-3) Page 4 EN 610862:2004 Licensed Copy: sheffieldun sheffieldun, na, Fr
25、i Nov 10 07:38:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 610862:2004 COATINGS FOR LOADED PRINTED WIRE BOARDS (CONFORMAL COATINGS) Part 2: Methods of test 1 Scope This part of IEC 61086 gives the methods of test for electrical insulating materials suitable for application as coatings fo
26、r loaded printed wire boards (conformal coatings), both as uncured and after application to specific boards. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references,
27、 the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-10:1988, Environmental testing Part 2-10:Tests Test J and guidance: Mould growth IEC 60068-2-11:1981, Environmental testing - Part 2-11: Tests Test Ka: Salt mist IEC 60068-2-14:1984, Environmental testing
28、Part 2-14: Tests Test N: Change of temperature IEC 60068-2-39:1976, Environmental testing Part 2-39: Tests Test Z/AMD: Combined sequential cold, low air pressure and damp heat test IEC 60058-2-78:2001, Environmental testing Part 2-78: Tests Test Cab: Damp heat, steady state IEC 60243-1:1998, Electri
29、c strength of insulating materials Test methods Part 1: Tests at power frequencies IEC 60243-2:1998, Electric strength of insulating materials Test methods Part 2: Additional requirements for tests using direct voltage IEC 60249-1:1982, Basic materials for printed circuits Part 1: Test methods IEC 6
30、0455-2:1998, Resin based reactive compounds used for electrical insulation Part 2: Methods of test IEC 60707:1999, Flammability of solid non-metallic materials when exposed to flame sources List of test methods IEC 61086-1, Specification for coatings for loaded printed wire boards (conformal coating
31、s) Part 1: Definitions, classification and general requirements IEC 61086-3 (all parts), Coatings for loaded printed wire boards (conformal coatings) Part 3: Specifications for individual materials Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:38:30 GMT+00:00 2006, Uncontrolled Copy, (c)
32、 BSI IEC 61086-3-1, Coatings for loaded printed wire boards (conformal coatings) Part 3: Specifications for individual materials Sheet 1: Coatings for general purpose (class I) and for high reliability (class II) ISO/DIS 1514:1984, Paints and varnishes Standard panels for testing ISO 1519: 2002, Pai
33、nts and varnishes Bend test (cylindrical mandrel) ISO 2808: 1997, Paints and varnishes Determination of film thickness ISO 5636-3:1992, Paper and board Determination of air permeance (medium range) Part 3: Bendtsen method 3 Test specimens 3.1 Specimen A 3.1.1 Test panel The test panel shall be as in
34、 Figure 1. It comprises a) an electrode comb for measurement of insulation resistance, b) a “Y” electrode for measurement of breakdown voltage, c) eight pads for measurement of thickness. The main body of the panel shall be (100 ? 0,2) mm2, with a connection tab (84,0 ? 0,2) mm x (12,0 ? 0,2) mm (se
35、e Figure 1). The reverse side of the panel shall be fully etched. 3.1.2 Preparation 3.1.2.1 Apparatus made of polyolefine or similar material is preferred for the preparation procedures. Apparatus made of borosilicate glass may also be suitable: it shall be checked by being rinsed in freshly prepare
36、d solvent (as in 3.1.2.2) immediately before use. Solvent contained in the apparatus shall not decrease in resistivity by more than 10 % over a period of (15 ? 1) min. Apparatus used in this test shall be reserved for this use and not used for any other purpose. 3.1.2.2 The panel shall be cleaned in
37、 a solvent of 75 % propan-2-ol and 25 % deionized water. Before use, the solvent shall be passed through a mixed bed deionizer column: after this treatment, the conductivity of the solvent at (20 ? 2) C shall be not more than 5,0 ?Sm1. 3.1.2.3 After cleaning, the panel shall be extracted with 320 ml
38、 of deionized solvent in accordance with 3.1.2.2. The panel shall be placed in a suitable funnel over a vessel of appropriate size and the solvent directed in a fine jet over it, washing both sides. The solvent flow rate shall be such that the extraction takes place over a time of at least 300 s. Th
39、e conductivity of the extract shall then be measured at (20 ? 2) C, using a suitable conductance meter with an accuracy of ?5 % or better. The conductivity of the extract shall be not greater than 50 ?Sm1. Page 6 EN 610862:2004 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:38:30 GMT+00:0
40、0 2006, Uncontrolled Copy, (c) BSI 3.1.2.4 Commercial equipment is available for preparation of printed wire boards in production processes. Such equipment may also be suitable for cleaning of these test panels. The quality control indication of this equipment is usually in the form of ionic content
41、, expressed as sodium chloride concentration in microgram per millilitre of solvent or microgram per square centimetre of panel. A suitable solution for checking the accuracy of indication contains 1,0 mgl1 of sodium chloride in solvent deionized as in 3.1.2.2. This is best prepared by dilution of a
42、 stock standard solution (1,000 ? 0,001) g NaCl in 1 000 ml deionized water) immediately before use, the dilution factor being 1:1 000. NOTE Much of the commercially available equipment is calibrated in units of microgram per square inch. In these units, 1,5 gcm-2 is equivalent to 10 gin-2. 3.1.3 Ap
43、plication The coating material to be tested shall be applied to all sides and edges of the panel by a single “controlled” dip with the longer axis vertical, and then cured in accordance with the manufacturers instructions. If the application is by vapour deposition, the technique to be followed shal
44、l be as stated by the manufacturer or supplier. Terminal points shall be suitably masked. 3.2 Specimen B 3.2.1 Test panel The test panel for the tests for tackiness and flexibility shall be soft copper, approximately 100 mm ? 50 mm and (0,125 ? 0,010) mm in thickness. The panel shall be cleaned by t
45、reating with a suitable solvent (for instance xylene-ethanol 1:1), then polished thoroughly with No. 000 steel wool and finally wiped free of any fingermarks or metal particles with the solvent and a lint-free cloth. The panel shall be used immediately (within 1 h) after cleaning. 3.2.2 Application
46、The coating material to be tested shall be applied as for specimen A (see 3.1.3) and cured in accordance with the manufacturers instructions. 3.3 Specimen C 3.3.1 Test panel The test panel for mould growth test (see 7.7.1) shall consist of polished plate glass approximately 40 mm2, and shall be solv
47、ent cleaned as described in ISO 1514. Standard microscope glass slides (75 mm ? 25 mm approximately) may also be used. 3.3.2 Application The coating material to be tested shall be applied as for specimen A (see 3.1.3) and cured in accordance with the manufacturers instructions. 3.4 Specimen D 3.4.1
48、Test panel The test panel shall be of the same material as for specimen A, but fully etched and with a length of (125 ? 5) mm and a width of (13 ? 1) mm and a thickness of (0,75 ? 0,05) mm. It shall be marked by scribing a line perpendicular to the longer axis (25 ? 0,5) mm away from the end which i
49、s to be ignited. The panel shall comply with the other requirements given in 4.3.3.3 of IEC 60249-1. Page 7 EN 610862:2004 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:38:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3.4.2 Application The coating material to be tested shall be applied as for specimen A (see 3.1.3) and cured in accordance with the manufacturers instructions. 4 Environmen