PangMin,



 



Here are the requirements from IPC-J-STD 006: 



3.3 Alloy Impurities Elements not listed as components that make up the composition of an alloy are considered impurities for that alloy. An alloy variation designator shall be used to specify the allowable impurity level of a solder product being offered, in the case of a manufacturer; or the allowable impurity level of a solder product required, in the case of a user. The alloy variation designator will be added to the end of the alloy name and become part of the name (see 6.3).



NOTE: Alloys for barrier-free die attachment applications have a different alloy impurity requirement (see 3.3.1).



Unless otherwise specified, the percentage by mass of impurity elements in alloys shall not exceed the following values. The percentage by mass of impurity elements in variation D alloys shall conform to the requirements in 



3.3.1.



 



 



Ag: 0.10



Cd: 0.002



Pb: 0.10



Al: 0.005



Cu: 0.08



Sn: 0.25



As: 0.03



Fe: 0.02



Zn: 0.003



Au: 0.05



In: 0.10



Sb: 0.05



Bi: 0.10



Ni: 0.01



 



 



The mass percentage of each element in an alloy shall be determined by any standard analytical procedure. Wet chemistry shall be used as the referee procedure.



 



Best Regards, 



George Liu 

Mobile: +86 159 7693 5620 

e-mail: [log in to unmask] 

"Creating Value that Increases Customer Competitiveness" 



________________________________



From: TGAsia [mailto:[log in to unmask]] On Behalf Of Pang, Min

Sent: Friday, June 15, 2007 9:25 AM

To: [log in to unmask]

Subject: [TGA] 关于焊锡成分分析



 



诸位，早上好：



 



向大家咨询一个关于焊锡的金属元素分析的问题。



 



各位是否知道，根据什么标准，对波峰焊的锡池内的焊锡的金属元素都包含什么金属元素？



 



标准是多少？在哪里可以检测到这些金属元素的成分？我公司内用的焊锡Sn/Pb比例为63/37。



 



或者，在您所在的公司内关于这项内容是如何控制的呢？



 



 



thanks a lot.



 



Best Regards!



 



Pang Min (Ms.) 庞敏



 



SV CGQ Quality Department



Siemens VDO Automotive Changchun Co., Ltd 

1981, Wu Han Avenue Changchun P.R.China



130033  





Tel: +86 431 84684557



Fax:+86 431 84684586



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