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楼主 |
发表于 2013-10-12 10:14
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我在旧版的标准中有看到不同的描述：
. b! I' B1 J, t+ G: \" r, O2.10.5.3 Printed boards
3 [3 t* o3 F7 a" K( Y4 }) g6 @For the inner layers of multi-layer boards, the distance between two adjacent tracks on the same+ ~- t% M# C/ o& K0 f: g- a
layer of a printed board is treated as distance through insulation (see 2.10.5.1).
1 a: Z: [2 }1 U
$ H) M+ q& Z4 P2 M0 F2 ^内层距离当成是绝缘穿透距离。& O' A7 M) Q, e% b0 C1 ?; D
4 o! W6 p0 b6 @; z. `4 W但新标准已经对这部分做了修改，改为
& G+ q ?* T/ k+ p2.10.6.3 Insulation between conductors on the same inner surface of a printed board
8 D( U6 F) i& P0 H+ bOn an inner surface of a multi-layer printed board (see Figure F.16), the path between any two$ I1 k6 ?+ H6 ~' F7 ~" y7 p
conductors shall comply with the requirements for a cemented joint in 2.10.5.5
* G. a1 f p. C: N2.10.5.5 Cemented joints$ D& W# O1 V5 \5 [7 t
Where the path between conductive parts is filled with insulating compound, and the insulating% |1 R8 d7 H. _# {. t
compound forms a cemented joint between two non-conductive parts (see Figure F.18) or
# C/ G4 D6 M& n! c% A& _% J+ t# J4 wbetween a non-conductive part and itself (see Figures F.16 and F.17), one of the following, a),
5 _; K4 u% s0 t2 K bb) or c) applies.6 K- h/ h: K( c9 p* e) i& p9 W7 c+ z
a) The distance along the path between the two conductive parts shall not be less
# Q3 s; o* u* E- Uthan the minimum CLEARANCES and CREEPAGE DISTANCES for Pollution Degree 2. The1 ?6 G7 M6 M& v% |, s2 W
requirements 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" `8 Q! y I& h, L; p
than the minimum CLEARANCES and CREEPAGE DISTANCES for Pollution Degree 1.5 K3 W. y$ C% K
Additionally, one sample shall pass the test of 2.10.10. The requirements for distance- ~3 G9 J0 e7 Z% A9 Q( a
through insulation of 2.10.5.2 do not apply along the joint.) j! B3 {* P! F
c) The requirements for distance through insulation of 2.10.5.2 apply between the1 S, U: }# R! b6 Q7 N/ I* V
conductive parts along the joint. Additionally, three samples shall pass the test of
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我们公司一般应用的是2.10.5.5中的a），
- Z- F1 B* q) |+ l h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。- e: y3 b) _* D7 j( G
3 Q) V) `5 ]7 {, S3 {- J
请高手指教，我的理解是否正确。 |
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