1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationMaterials for printed boards and other interconnecting structuresPart 2-40: Reinforced base materials clad and unclad High performance, non-halogenated epoxide woven E-glass lami
2、nate sheets of defined flammability (vertical burning test), copper-clad for lead-free assemblyBS EN 61249-2-40:2013National forewordThis British Standard is the UK implementation of EN 61249-2-40:2013. It is identical to IEC 61249-2-40:2012.The UK participation in its preparation was entrusted to T
3、echnical Committee EPL/501, Electronic assembly technology 1 065 mm 1 155 mm; 1 065 mm 1 280 mm; 1 000 mm 1 000 mm; 1 000 mm 1 200 mm. 6.8.2 Tolerances for sheet sizes The size of sheet delivered by the supplier shall not deviate more that +20/0 mm from the ordered size. 6.9 Cut panels 6.9.1 Cut pan
4、el sizes Cut panel sizes shall be, when delivered, in accordance with the purchasers specification. 6.9.2 Size tolerances for cut panels For panels cut to size according to the purchasers specification, the following tolerances for length and width shall apply as shown in Table 7. Tolerances indicat
5、ed as normal shall be in effect unless otherwise specified by in the purchasing specification. Table 7 Size tolerances for cut panels Panel size mm Tolerance requirement mm Normal Close 300 2,0 0,5 300 600 2,0 0,8 600 2,0 1,6 NOTE The specified tolerances include all deviations caused by cutting the
6、 panels. 6.9.3 Rectangularity of cut panels For panels cut to size according to the purchasers specification, the following requirements for rectangularity shall apply as shown in Table 8. Tolerance indicated as normal shall be in effect unless otherwise specified in the purchasing specification. Ta
7、ble 8 Rectangularity of cut panels Property Test method IEC 61189-2 Requirements mm/m Normal Close Rectangularity of cut panels 2M23 3 2 BS EN 61249-2-40:201361249-2-40 IEC:2012 13 7 Non-electrical properties of the base material after complete removal of the copper foil 7.1 Appearance of the dielec
8、tric base material The etched specimens shall be inspected to verify that no surface or subsurface imperfections of the dielectric material exceed those shown below. The panels shall be inspected using an optical aid apparatus which provides a minimum magnification of 4X. Referee inspection shall be
9、 conducted at 10X magnification. Lighting conditions of inspection shall be appropriate for the material under inspection or as agreed upon between user and supplier. Surface and subsurface imperfections (such as weave texture, resin starvation, voids, foreign inclusions) shall be acceptable provide
10、d that the imperfections meet the following: the reinforcement fibres are not cut or exposed; the foreign inclusions are not conductive; the imperfections do not propagate as a result of thermal stress; the foreign inclusions are translucent; opaque foreign fibres are less than 15 mm in length and a
11、verage no more than 1,0 per 300 mm 300 mm area; opaque foreign inclusions other than fibres shall not exceed 0,50 mm. Opaque foreign inclusions less than 0,15 mm shall not be counted. Opaque foreign inclusions between 0,50 mm and 0,15 mm shall average no more than two spots per 300 mm 300 mm area; v
12、oids (sealed voids or surface voids) have a longest dimension less than 0,075 mm and there should not be more than three voids in a 3,5 mm diameter circle. 7.2 Flexural strength When the laminate is tested in accordance with test method 2M20 of IEC 61189-2 the flexural strength shall be as shown in
13、Table 9. Table 9 Flexural strength requirements Property Test method IEC 61189-2 Requirements Flexural strength: Length direction Cross-direction (applicable to sheets 1,0 mm in thickness) 2M20 400 N/mm2300 N/mm2Flexural strength: Length direction Elevated temperature (applicable to sheets 1,0 mm in
14、 thickness) Not specified 7.3 Flammability When the laminate is tested in accordance with test method 2C08 (thickness 0,05 0,3 mm) or 2C06 (thickness 0,3 3,2 mm) of IEC 61189-2 the flammability shall be as shown in Table 10. The performance labelled V-0 shall be in effect unless otherwise noted on t
15、he purchase order. BS EN 61249-2-40:2013 14 61249-2-40 IEC:2012 Table 10 Flammability requirements Property Test method IEC 61189-2 Requirements Designation V-0 Flammability: Flaming combustion time after each application of the flame for each test specimen Total flaming combustion time for the 10 f
16、lame applications for each set of five specimens Glowing combustion time after the second removal of the test flame Flaming or glowing combustion up to the holding clamp Dripping flaming particles that ignite the tissue paper 2C06 10 s 50 s 30 s None None 7.4 Water absorption When the laminate is te
17、sted in accordance with test method 2N02 of IEC 61189-2 the maximum water absorption shall be as shown in Table 11. Table 11 Water absorption requirements Property Test method IEC 61189-2 Thickness mm Requirements % Water absorption 2N02 0,05 Tg) 250 ppm/C Specific heat capacity 1,25 kJ/(kgC) Therma
18、l conductivity 0,3 W/(mC) UL temperature index (mechanical) 130 C UL temperature index (electrical) 130 C Maximum operating temperature (MOT) 130 C BS EN 61249-2-40:2013 20 61249-2-40 IEC:2012 Annex B (informative) Common laminate constructions Table B.1 gives the nominal thicknesses. Table B.1 Thic
19、kness Nominal thickness mm Common construction 0,075 1 080 0,080 2 106 0,100 2 106 0,100 2 113 0,100 2 116 0,125 2 116 0,125 2 165 0,125 2 1 080 0,15 2 157 0,15 2 165 0,16 1 500 0,18 7 628 0,18 1 500 0,20 2 2 113 0,20 2 2 116 0,20 7 628 0,25 2 2 116 0,25 2 2 165 0,26 1 080/2 116/1 080 0,30 2 2 157 0
20、,30 2 2 165 0,30 2 116/2 112/2 116 0,30 1 080/7 628/1 080 0,36 2 7 628 0,37 2 113/7 628/2 113 0,38 1 500/1 080/1 500 0,41 7 628/1 080/7 628 0,43 2 116/7 628/2 116 0,45 3 1 500 0,46 7 628/2 112/7 628 0,48 7 628/2 116/7 628 0,51 7 628/2 165/7 628 0,51 1 080/2 7 628/1 080 0,54 3 7 628 BS EN 61249-2-40:
21、201361249-2-40 IEC:2012 21 Nominal thickness mm Common construction 0,61 3 7 628/1 080 0,61 2 116/2 7 628/2 116 0,66 7 628/2 2 165/7 628 0,67 7 628/2 1 500/7 628 0,74 4 7 628 0,74 2 113/3 7 628/2 113 0,80 4 7 628/1 080 0,90 5 7 628 1,08 6 7 628 1,46 8 7 628 NOTE Prepreg made from a specific style of
22、 glass used in different constructions may have different resin contents. BS EN 61249-2-40:2013 22 61249-2-40 IEC:2012 Annex C (informative) Guideline for qualification and conformance inspection See Table C.1 for qualification and conformance testing. Table C.1 Qualification and conformance testing
23、 Property Test method IEC 61189-2 Qualification testing Conformance testing Conformance frequency Peel strength after thermal shock 2M14 Yes Yes Lot Peel strength at 125 C 2M15 Yes Yes Quarterly Peel strength after solvent vapour 2M06 Yes Yes Quarterly Peel strength after simulated plating 2M16 Yes
24、No Pull off strength 2M05 Yes No Dimensional stability 2X02 Yes Yes Monthly Flexural strength 2M20 Yes Yes Annually Flammability 2C06 Yes Yes Monthly Thermal stress, unetched 2C05 Yes Yes Lot Solderability 2MXX Yes No Glass transition temperature 2M11 Yes Yes Monthly Cure factor 2M03 Yes Yes Monthly
25、 Permittivity at 1 MHz, as received 2E10 Yes Yes Monthly Decomposition temperature 2MXX Yes Yes Annually Time to delamination (TMA) 2MXX Yes Yes Quarterly Thermal resistance 2MXX Yes Yes Quarterly Z-Axis expansion 2MXX Yes Yes Quarterly Dissipation factor at 1 MHz, as received 2E10 Yes Yes Monthly S
26、urface resistance after damp heat/recovery 2E03 Yes Yes Annually Volume resistance after damp heat/recovery 2E04 Yes Yes Annually Arc resistance 2E14 Yes Yes Annually Dielectric breakdown 2E15 Yes Yes Quarterly Electric strength 2E11 Yes Yes Quarterly Water absorption 2N02 Yes Yes Quarterly Bow and
27、twist 2M01 Yes Yes Lot Surface waviness 2M12 Yes No Appearance of the dielectric base material See 7.1 Yes Yes Lot NOTE Users of this standard are encouraged to supply information to be included in the annex. BS EN 61249-2-40:201361249-2-40 IEC:2012 23 Bibliography IEC 60194:2006, Printed board desi
28、gn, manufacture and assembly Terms and definitions ISO 9000:2005, Quality management systems Fundamentals and vocabulary ISO 14001:2004, Environmental management systems Requirements with guidance for use _ BS EN 61249-2-40:2013This page deliberately left blankThis page deliberately left blankBSI is
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