Hi :
做cross-section只是用来检查IMC和void,不存在放大不良.不良本身如果已
经存在,早发现总比客诉强
Thanks and Best Regards
Sonic Lu 陆尚
Process Engineer
Autoliv Electronics China (ACE) Co.,Ltd
Tel: +86-21-67109300-3162
Peng Yunjun <[log in to unmask]>
Sent by: TGAsia <[log in to unmask]>
2011-05-16 18:41
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各位老师，
对于cross section试验。
不知大家是否有标准的作业流程可供分享。
我也怕是在做cross section的时候，把原件的缺陷放大了。或则做cross section的
时候把其他工艺过程的潜在缺陷模式累加了。
附件是我们公司的作业指导。
请大家提供意见。
Peng Yunjun(Mr) 彭云军(先生)
CACC PT Department
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+86-431-84684785
13756139127
发件人: Wen Zhong 钟文 <[log in to unmask]>
收件人: <[log in to unmask]>
日期: 2011-05-16 16:11
主题: [TGAsia] 答复: [TGAsia] 答复: [TGAsia] 转发: Analysis
发件人: TGAsia <[log in to unmask]>
通过上次9704培训时与各位的交流
后来我们工厂目前针对MLCC定义的应变极限是1000με，高于800就定义为风险站位
。需要进行改善。
不知道各位的工厂是如何定义的？
Best Regards!!!
*****************************************************************************
显示器事业部制造处工业工程部（MNT/MFG/IE/PCBA) 钟文 /kelvin
冠捷电子（福建）有限公司/Top Victory Electronics (Fujian)Co.,Ltd
地址(Add)：中国福建省福清市元洪路上郑
(Shangzheng,Yuanhong Road,Fuqing City,FUjian Province,P.R.China)
邮编(Postcode)：350301
电话(Tel)：+86-591-85285555-8560，传真(Fax)：+86-591-85285447
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发件人: TGAsia [mailto:[log in to unmask]] 代表 Eric Zhang(张力) CTI
发送时间: 2011年5月16日 15:49
收件人: [log in to unmask]
主题: [TGAsia] 答复: [TGAsia] 答复: [TGAsia] 转发: Analysis
可以使用应力应变系统进行测试，将应变片贴在需要评估的电容位置，另一端连接数
据采集器中，然后模拟实际情况进行加工，最后将测量出的数值与允许阀值进行比较
即可。
Best Regards,
Eric Zhang 张力
Centre Testing International, Reliability & FA
TEL:0755-3368 1144|Cell: +86 137 2550 4480
FAX:0755-3368 3385 |E-mail: [log in to unmask]
Website: www.cti-cert.com
发件人: Bing_Xiong (b 熊建斌) [mailto:[log in to unmask]]
发送时间: 2011年5月16日 15:38
收件人: Asia Committe Task Group Forum; Eric Zhang(张力) CTI
主题: RE: [TGAsia] 答复: [TGAsia] 转发: Analysis
Dear all;
請教下如何量測這種機械應力,多大才不會對MLCC 電容有影響?
Best regards!
Bing_xiong熊建斌
康舒電子(東莞)有限公司
TEL : (0769) 8791-5950 Ext :36969
E-mail : [log in to unmask]
地址 :中國廣東省東莞市塘廈鎮宏業工業區(宏業大道)17-28號
Adr:17-28,(Hong Yeh)Hong Yeh Industrial District ,Tang Xia Town , Dong
Guan City , Guang Dong Province ,China.
From: TGAsia [mailto:[log in to unmask]] On Behalf Of Eric Zhang(?力) CTI
Sent: Monday, May 16, 2011 11:38 AM
To: [log in to unmask]
Subject: [TGAsia] 答复: [TGAsia] 转发: Analysis
同意钟工的看法，这种45°的裂纹应该是有机械应力引起的。
如果是双面板，可以调查一下SMT时是否在电容断裂位置布有顶针，发生干涉
然后就是在装配阶段是否也是用了工装，但工装设计不当导致1206电容位置打电批或
者气批时PCB板变形过大
还有就是ICT或者FT测试的工装也检查一下是否有干涉的风险
最后是分板，如果是铣刀式的话会好一些，但如果是单点式、滚刀或者是手工的话，
引入的应力风险肯定比较大。
Best Regards,
Eric Zhang 张力
Centre Testing International, Reliability & FA
TEL:0755-3368 1144|Cell: +86 137 2550 4480
FAX:0755-3368 3385 |E-mail: [log in to unmask]
Website: www.cti-cert.com
发件人: TGAsia [mailto:[log in to unmask]] 代表 Wen Zhong 钟文
发送时间: 2011年5月16日 8:13
收件人: [log in to unmask]
主题: [TGAsia] 答复: [TGAsia] 转发: Analysis
Yunjun：
从图片看，这种45°的裂纹象是机械应力造成的裂纹，而不是热应力的裂纹。
不良发生的站位就是回焊炉后吗？没有其他的分板、组装、测试等？
我们工厂也发生过类似的不良，但基本都是机械应力造成。
Best Regards!!!
*****************************************************************************
显示器事业部制造处工业工程部（MNT/MFG/IE/PCBA) 钟文 /kelvin
冠捷电子（福建）有限公司/Top Victory Electronics (Fujian)Co.,Ltd
地址(Add)：中国福建省福清市元洪路上郑
(Shangzheng,Yuanhong Road,Fuqing City,FUjian Province,P.R.China)
邮编(Postcode)：350301
电话(Tel)：+86-591-85285555-8560，传真(Fax)：+86-591-85285447
手机(Mobile)：15980730668
电邮(E-mail)：wen.zhong @tpv-tech.com
网址：http://www.tpv-tech.com
*****************************************************************************
发件人: TGAsia [mailto:[log in to unmask]] 代表 Peng Yunjun
发送时间: 2011年5月15日 14:04
收件人: [log in to unmask]
主题: [TGAsia] 转发: Analysis
大家好，
最近我们单位有一个1206的电容出现图片式的裂纹。
回流焊后做切片，得到的图片。
温度曲线见附件。
请大家帮我分析一下市什么原因，有可能造成这样的缺陷呢？
还有我们用的是634的水冷回流炉。
如果冷却1区的上冷却盖板未装，会造成此类问题么？
谢谢！！急！！
Peng Yunjun(Mr) 彭云军(先生)
CACC PT Department
[log in to unmask]
+86-431-84684785
13756139127
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