不算

 

Capri Rao(饶重)

QSMC SMT ME

Laptop&City Device Business Unit

Tech-Giant(shanghai)Computer Co.Ltd.

QSMC/Quanta Group

Tel:(021)37740168-47855,T:15000737973

公司地址:上海市松江出口加工区茸江路68C

 

发件人: TGAsia [mailto:[log in to unmask]] 代表 Peng Yunjun
发送时间: 20111129 12:03
收件人: [log in to unmask]
主题: [TGAsia] 答复: [TGAsia] 答复: [TGAsia] 答复: [RMX:###] [TGAsia] 陈海燕 不在办公室。

 

空洞算焊接面积么?

Peng Yunjun(Mr) 彭云军(先生)
CACC PT Department
[log in to unmask]
+86-431-84684785
13756139127




发件人:         Rock <[log in to unmask]>
收件人:         <[log in to unmask]>
日期:         2011-11-29 11:56
主题:        [TGAsia] 答复: [TGAsia] 答复: [RMX:###] [TGAsia] 陈海燕 不在办公室。
发件人:        TGAsia <[log in to unmask]>





 
偏移是不大于25%,即焊接面积需大于75%
 

 



发件人: TGAsia [mailto:[log in to unmask]] 代表 Peng Yunjun
发送时间: 20111129 11:48
收件人: [log in to unmask]
主题: [TGAsia] 答复: [RMX:###] [TGAsia] 陈海燕 不在办公室。

 
[log in to unmask]">

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各位专家,
我们IPC中说了,空洞现象正常。偏移可以25%
也就是说我们焊接面积的覆盖率小于75%是可以接受的,那到底底线是多少50% 或者是什么值。

sop
下面带散热体的元件, 有同样的问题,如覆盖面积过大,容易有焊球!
望高手指教!!!




Peng Yunjun(Mr)
彭云军(先生)
CACC PT Department
[log in to unmask]
+86-431-84684785
13756139127


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