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现阶段还没有正式的标准或规范规定间距最小安全间距。一些厂家可能内部有一些标准，但是是不公开的。
对所有涉及CAF的要求或课题，我们总裁BOB Neves先生在这方面做过专题研究。
Best Regards,
Laya Chen 陈燕
Training Coordinator
Microtek Changzhou Laboratories
麦可罗泰克(常州)实验室
Tel: +86 519 5487805
Fax: +86 519 5487810
Email: [log in to unmask]
WWW.China.TheTestLab.Com
-----邮件原件-----
发件人: TGAsia [mailto:[log in to unmask]] 代表 JiaXing LIU
发送时间: 2007年7月26日 13:01
收件人: [log in to unmask]
主题: Re: [TGA] 请教
大家也好
我们也有同样的CAF问题。
请问如果用的是普通的非CAF材料，PTH孔的间距最小安全间距是多少不会有CAF的问题？如果用
anti-CAF的材料的话，PTH孔的间距最小安全间距是多少？
Isola 370HR, Tg>=150degrees, Td 340D. core thickness is 0.7mm, 2X7628
core. Total thickness is 1.6mm, 1Oz Copper.
8 pairs of via holes with 15.7mils parallel distance between hole wall
to hole wall. The pair of holes is anode and cathode.
The hole size is 0.35mm. finish is immersion silver.
我们的测试要求是８５度和８５％湿度， １０００小时．
>>> Li Ruijuan <[log in to unmask]> 2007-7-26 11:23 >>>
大家好!
请问关于PCB板过孔之间的绝缘阻抗要求是什么,测试条件呢,对孔距\孔径有没有要求
?另外,如果验证是否会有CAF缺陷,实验条件怎样规定,谢谢
孔间距很大,湿热试验后孔间绝缘电阻却减小很多,可能是什么原因呢?
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