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对于多层板,若是内层同一表面,要求参照2.10.5.5;若是不同表面,基本绝缘的话没有要求,只有附加或加强,要求绝缘穿透距离。作者: xidua-10 时间: 2013-10-4 16:43
多層板的內部距離你是怎麼弄出來的,求解作者: 火水晶 时间: 2013-10-12 10:14
我在旧版的标准中有看到不同的描述: 5 A- F5 O; V3 Q7 l4 K3 o2.10.5.3 Printed boards 4 x# k+ C1 L& q4 JFor the inner layers of multi-layer boards, the distance between two adjacent tracks on the same ' [# B( G9 C2 z8 {layer of a printed board is treated as distance through insulation (see 2.10.5.1). , X5 }9 t$ e- E ) G* \% O1 Y( G2 q6 z内层距离当成是绝缘穿透距离。: t; T1 P- ]( y2 N
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但新标准已经对这部分做了修改,改为+ M5 E5 T$ L( |5 Q% C- G' f
2.10.6.3 Insulation between conductors on the same inner surface of a printed board 6 e8 W9 [! b( @8 h# d8 qOn an inner surface of a multi-layer printed board (see Figure F.16), the path between any two/ {+ E3 F4 d _, q8 n
conductors shall comply with the requirements for a cemented joint in 2.10.5.5' O1 p2 W% `* g/ R+ r" A
2.10.5.5 Cemented joints * I1 b# ^& X* fWhere the path between conductive parts is filled with insulating compound, and the insulating 8 z$ \% k9 }% @5 J, U7 Y! qcompound forms a cemented joint between two non-conductive parts (see Figure F.18) or / {' Q5 M- m- \between a non-conductive part and itself (see Figures F.16 and F.17), one of the following, a), * A- @" w2 O* X& S; v/ vb) or c) applies., t2 I( u6 l& ^" y( \& |: e- }
a) The distance along the path between the two conductive parts shall not be less ; Y5 t) m7 u# \! ?9 Sthan the minimum CLEARANCES and CREEPAGE DISTANCES for Pollution Degree 2. The . m: Y- J3 `3 N7 M- q. L# F/ Frequirements for distance through insulation of 2.10.5.2 do not apply along the joint.b) The distance along the path between the two conductive parts shall not be less/ I- i/ p+ _( w/ R6 h0 G
than the minimum CLEARANCES and CREEPAGE DISTANCES for Pollution Degree 1.% {2 L, N6 @6 {8 m3 a9 H1 N
Additionally, one sample shall pass the test of 2.10.10. The requirements for distance! p. Z4 ~- o& x1 `
through insulation of 2.10.5.2 do not apply along the joint.% s" G, M- L! i, d
c) The requirements for distance through insulation of 2.10.5.2 apply between the9 k, c+ S6 k6 T/ {
conductive parts along the joint. Additionally, three samples shall pass the test of, \6 u6 ]0 C' ~; Y+ T
# w) M X0 i+ p! w. E: s& W: C我们公司一般应用的是2.10.5.5中的a), , [* e' C0 I/ W- U% d. r所以在新的标准里,内层的距离和外层的绝缘距离是相同的。" d; d$ Y! R% L% Z' i3 m+ V
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请高手指教,我的理解是否正确。作者: 火水晶 时间: 2013-10-14 08:48