Oh, yes. Absolutely a requirement. We do this on every LOT of components. You need to do this to ensure there are no Sn99 or gold-finished parts that would require tinning in order to prevent tin whisker issues in high rel applications, especially for space and aviation. The finish described on the component print is not the actual finish on about 5-8% of all components received, even when there are stringent clauses in the purchase order. It is too bad that the component industry is so far out of control. We also get class 5a MSDs that are not labeled as such, etc. We run that XRF at least 8 hours per day. For those parts we know we cannot get in the desired finish, we use a robotic tinning cell made for us by V-Tek. This is truly an amazing machine, extremely versatile. We can tin right up to the component body without hurting the components, because the immersion point, immersion speed, and immersion dwell can be very precisely programmed such that we get 100% tin/lead coating over the entire termination, not just the part to be soldered.



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge

Sent: Saturday, December 12, 2009 3:16 AM

To: [log in to unmask]

Subject: [TN] RoHS burden



Hi all,

have not had time to take part of the discussions for a while. Am consulting 

at another company. They needed help with doing analysis of components. 

Boeing is incorporated. I got a list of forbidden materials from them. Not 

many can cope with Boeing's requirements. Only a few in whole Europe! Now, 

I've a question. Has anyone of you been involved in such tough demands, 

namely this one...not only they call for checking the finish of every 

component type, but all values (!!) within each component family. That 

means, that one sample from EVERY resistor value must be analyzed and 

reported to Boeing.  An incredible job list.  Does this make sense?

/Inge 



---------------------------------------------------

Technet Mail List provided as a service by IPC using LISTSERV 15.0

To unsubscribe, send a message to [log in to unmask] with following text in

the BODY (NOT the subject field): SIGNOFF Technet

To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)

To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest

Search the archives of previous posts at: http://listserv.ipc.org/archives

Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815

-----------------------------------------------------