请教诸位专业人士,

 

          现在我们有一款新的高性能高压产品需要做涂覆工艺,但相关的客户有以下疑问:

          选用的三防漆的绝缘强度为80KV/MM,绝缘电阻为1x1014 Ohm,产品使用中要高低温变化,并被密封使用。

²  涂覆后,PCBA上的元件的绝缘性是否降低――――个人认为没问题,不清楚怎么与空气的绝缘强度和板上绿油的比较?

²  免清洗的锡膏回流后,应该还有少量的助焊剂残留,三防漆将其抱住,两者间的兼容性,附着在元件脚上的助焊剂,是酸性物质,对元件和PCB有多大影响,
在后续使用中是否可能有电迁移的问题出现及防止?

²  三防漆产生的应力(应该与热膨胀系数有关?)对元件的影响?

²  在老化试验后,元件脚部位残留物质颜色变得黄褐色,较深,正常吗?

²  还有其他一些问题吗?

 

 

Best regards / Mit freundlichen Grüßen


Xu Jibin / 徐继斌

 

United Automotive Electronic Systems Co., Ltd. ShP/TF

No. 555 Rong Qiao Road, Pudong New Area,

Shanghai 201206, P. R. China


Tel. +86 (21) 6168      8252
Fax +86 (21) 5899      2795

Wechat: UAES_public 

说明: 二维码8cm - 副本

 


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