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黄卡里没有这个厚度你认为是UL通过了认证满足UL 796要求吗？
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按照UL8750：- P! |/ T3 a! `" }
7.7.1 Printed wiring boards shall meet the following criteria:
( f! Z8 g$ J. r% {( a" A6 Ea) Conductive traces shall be bonded to the substrate for the minimum conductor width and/ X0 Q4 F% N& W0 q
maximum unpierced area as required by the Standard for Printed-Wiring Boards, UL 796,- P Y9 a4 |) u" n
Exception: Printed-wiring boards that are completely encased in potting compound are permitted4 r, R" F+ d U4 l2 t% t
to exceed their specified minimum conductor width or maximum unpierced area.
0 n7 E( R, A( M# ]4 [; Z3 fb) Temperatures measured in the temperature test of 8.3 shall not exceed the temperature
5 z7 x- x! i frating (RTI) of the substrate as determined by the Standard for Polymeric Materials – Long
% t3 u! Q8 C. N% l. c9 |4 M& `9 OTerm Property Evaluations, UL 746B, and
5 Z! p5 n2 E, L4 z1 x. h$ ec) Printed wiring board substrate flammability shall be no less than V-1 in accordance with the* n+ ^. M4 R/ M2 d' P$ j+ {
Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL
$ `2 @6 C2 g) t# W2 ]2 _3 x94.4 J# O, C$ L, B2 D2 z
Exception: A circuit supplied by a Class 2 or LVLE source need not comply.
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p) A3 u9 \1 m8 w; Q
& ?5 A( ]. j- k! B4 r2 Q; H可以看是否满足Exeption 要求。 |
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发表于 2010-6-9 16:47
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