Genny -
Because if you supply to the US Dept of Defense to the component "lead" spec that says "at least 3% lead in the component plating", and you ship pure tin plate, you are guilty of contract fraud. YOU ARE NOT MEETING THE SPEC YOU AGREE TO SUPPLY TO. I don't care if the parts were bid at 1Cent or 1 dollar, part selling price has nothing to do with contract compliance.
Agreed, an awfully lot of DoD parts are sold to a print requirment (50 ohms) which may not call out the plating composition requirement, or you may know that Defense Logistics Agency has no way to track lot certification, but you are still guilty of fraud.
Denny Fritz
-----Original Message-----
From: Genny Gibbard <[log in to unmask]>
To: [log in to unmask]
Sent: Mon, Dec 14, 2009 10:46 am
Subject: Re: [TN] RoHS burden
I'm sorry, but wasn't the original question regarding requirements like
esting every value in a series for a material content breakdown?
am not talking screening every order, where you may catch bad batches
hat don't meet the spec stated, but rather, reporting what the actual
xpected material content is for a part series like an 0603 5% thick
ilm resistor.
ould a 51 ohm resistor really have any different measurable material
ontent from a 75 ohm, or a 1K ohm, for that matter, if all of them were
rom the exact same manufacturer, and same resistor series datasheet?
here are thousands of values. How can we really expect the resistor
ompany to provide individual breakdowns/test results for each of 1000's
f values of a part they are selling for .01 cent each?
Genny
-----Original Message-----
rom: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
ent: December 14, 2009 5:47 AM
o: [log in to unmask]
ubject: Re: [TN] RoHS burden
Oh, yes. Absolutely a requirement. We do this on every LOT of
omponents. You need to do this to ensure there are no Sn99 or
old-finished parts that would require tinning in order to prevent tin
hisker issues in high rel applications, especially for space and
viation. The finish described on the component print is not the actual
inish on about 5-8% of all components received, even when there are
tringent clauses in the purchase order. It is too bad that the
omponent industry is so far out of control. We also get class 5a MSDs
hat are not labeled as such, etc. We run that XRF at least 8 hours per
ay. For those parts we know we cannot get in the desired finish, we use
robotic tinning cell made for us by V-Tek. This is truly an amazing
achine, extremely versatile. We can tin right up to the component body
ithout hurting the components, because the immersion point, immersion
peed, and immersion dwell can be very precisely programmed such that we
et 100% tin/lead coating over the entire termination, not just the part
o be soldered.
-----Original Message-----
rom: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
ent: Saturday, December 12, 2009 3:16 AM
o: [log in to unmask]
ubject: [TN] RoHS burden
Hi all,
ave not had time to take part of the discussions for a while. Am
onsulting at another company. They needed help with doing analysis of
omponents.
oeing is incorporated. I got a list of forbidden materials from them.
ot many can cope with Boeing's requirements. Only a few in whole
urope! Now, I've a question. Has anyone of you been involved in such
ough demands, namely this one...not only they call for checking the
inish of every component type, but all values (!!) within each
omponent family. That means, that one sample from EVERY resistor value
ust be analyzed and reported to Boeing. An incredible job list. Does
his make sense?
Inge
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