That's the truth.
Anyone out there in telecomm/internet infrastructure and 6/6 right
now??....I for one very much doubt it, if you take a look at the apple web
site they state that in terms of lead free soldering they are still working
on it. (they are probably already soldering with it but look at the comment
and form your own conclusions)
Link is here:
http://www.apple.com/environment/design/materials/rohs.html
John
------------------------------------
Avanex
John Burke
Senior Manager RoHS Compliance
[log in to unmask]
40919 Encyclopedia Circle
Fremont
CA 94538
tel: 510 897 4250
fax: 510 979 0189
mobile: 510 676 6312
------------------------------------
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Leo Higgins
Sent: Friday, November 04, 2005 8:30 AM
To: [log in to unmask]
Subject: Re: [LF] Making IC's RoHS Compliant
The difference is that the down-hole product life expectancy is a whole lot
shorter than that of a cell phone, a WAN router, telecom hardware, or
automotive electronics, being measured in minutes/hours, not years/decades.
Best regards,
Leo
Leo M. Higgins III, Ph.D.
Vice President Technical Support Operations
ASAT, Inc.
3755 Capital of Texas Highway, Suite 100
Austin, Texas 78704
ph 512-383-4593
fx 512-383-1590
[log in to unmask]
www.asat.com
The information contained in this electronic message is CUSTOMER/SUPPLIER
PRIVILEGED AND CONFIDENTIAL INFORMATION intended only for the use of the
individual or entity named above. If the reader of this message is not the
intended recipient, you are hereby notified that any dissemination,
distribution and copying of this communication is strictly prohibited. If
you have received this communication in error, please immediately notify the
sender by electronic mail. Thank you.
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Michael McMonagle
Sent: Friday, November 04, 2005 10:20 AM
To: [log in to unmask]
Subject: Re: Making IC's RoHS Compliant
John,
Downhole tools having been using lead-free successfully for years,
it's called Sn96 (actually 96.5/Ag3.5). Or lead-rich Pb85 and Pb93.5 (HMP),
depending on how hot the tool service temperature is. A pain in the behind
to work with, but immune from RoHS <g>....
Mike McMonagle
Quality Engineer
OYO Geospace
7007 Pinemont Drive
Houston, TX 77040
713-986-8650
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of John Burke
Sent: Friday, November 04, 2005 10:04 AM
To: [log in to unmask]
Subject: Re: [LF] Making IC's RoHS Compliant
Sounds like you are were having fun, down the hole logging probes I hope -
those are FUN to play with, haven't designed or built one in a few years
though.
For those that don't know down, hole probes for well logging is an
environment that makes space, military, or under hood automotive electronics
look positively benign.
If someone can get a logging probe to work reliably with lead
free..............it would make the rest of us very happy.......8-)
John
------------------------------------
Avanex
John Burke
Senior Manager RoHS Compliance
[log in to unmask]
40919 Encyclopedia Circle
Fremont
CA 94538
tel: 510 897 4250
fax: 510 979 0189
mobile: 510 676 6312
------------------------------------
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Michael McMonagle
Sent: Friday, November 04, 2005 7:15 AM
To: [log in to unmask]
Subject: Re: [LF] Making IC's RoHS Compliant
Rick,
Sometimes you have to be nuts to do what is required. In a previous
life dealing with PCBAs used for downhole drilling tools, it was common
practice to re-tin all components. The boards were soldered using a variety
of high temp alloys, any decent level of cross-contamination from tin-lead
components could cause parts to literally fall off the board during use of
the tools. We would re-tin using the same high-temp alloy, using a two stage
solder dip process. Handling damage? Sometimes. ESD? Kept in check by good
practices. Additional thermal excursions and thermal shock? Definitely, but
the lesser evil compared to parts falling off a $250K tool and halting an
entire drilling crew at $25K - $50K per day. Now that's nuts....
Mike McMonagle
Quality Engineer
OYO Geospace
7007 Pinemont Drive
Houston, TX 77040
713-986-8650
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Smith, Rick
Sent: Friday, November 04, 2005 8:55 AM
To: [log in to unmask]
Subject: Re: [LF] Making IC's RoHS Compliant
I think you guys are all nuts, or bordering on it.
After you handle these parts, striping the lead off and re-tinning, many
if not most of the parts will be damaged or stressed from handling, ESD,
heat, and then you need to figure how to verify all the lead is out;
And, you don't even know how many will survive without delaminating in
the higher reflow temperatures.
Just my thoughts..
Rick Smith
Senior Materials & Process Engineer
Phone: (512)652-3544
Fax: (512)652-3545
Cell: (512)299-6925
Email: [log in to unmask]
ClearCube Technology, Inc
8834 Capital of Texas Hwy N
Austin, TX 78759
www.clearcube.com
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Brian Ellis
Sent: Friday, November 04, 2005 2:15 AM
To: [log in to unmask]
Subject: Re: [LF] Making IC's RoHS Compliant
I don't think you are right. The tinning is done after the packet is
moulded, in my experience. It would be very hazardous to mould a
thermosetting polymer over a tin-lead alloy, which can easily creep,
destroying the hermeticity.
Brian
to Paul Taylor wrote:
> Doug
>
> Stripping and re-tinning the leads does the outside of the IC, but
unless
> you aim to split the IC's down the middle!! then there will be lead
> trapped in the leadframe under the epoxy. This would constitute a
fail in
> RoHS.
> I suggest you either put pressure on you IC manufacturer to supply in
a
> RoHS compliant leadframe or re-design. Better get your skates on,
there
> is not much time left.....(re-design, re-qualify etc)
> Also I agree with Doug Rohm, it would have to survive the higher
> temperatures
> Better get that CAD package out....
>
> regards
> Paul
>
>
> Paul R Taylor
> Senior Engineer, RoHS Compliancy Group, IED
> Pitney Bowes Ltd
> The Pinnacles, Elizabeth Way, Harlow, Essex, CM19 5BD
> tel: +44 1279 449 744 fax +44 1279 449 594
> email: [log in to unmask] website: www.pb.com
>
>
>
> "Douglas, Scott" <[log in to unmask]>
> Sent by: Leadfree <[log in to unmask]>
> 27/10/2005 20:38
> Please respond to
> "(Leadfree Electronics Assembly Forum)" <[log in to unmask]>; Please
respond
> to
> "Douglas, Scott" <[log in to unmask]>
>
>
> To
> [log in to unmask]
> cc
>
> Subject
> [LF] Making IC's RoHS Compliant
>
>
>
>
>
>
> Dear Group,
>
> We are looking for a way to avoid re-designing a number of PWB to
replace
> non-RoHS compliant IC's with other compliant (not drop-in replacement)
> parts. In a discussion today with our component engineer, we wondered
if
> we could take our stock of non-RoHS compliant IC's, send them to some
lab
> someplace, have them (dip, acid etch, whatever) remove the tin/lead
solder
> plating the leads and then have the leads re-plated with lead-free
solder.
> This assumes a plastic or ceramic package with standard metal leads,
maybe
> through hole, maybe surface mount. Could we do this and then claim to
be
> RoHS compliant? Anything else we should think about in this?
>
> Scott Douglas, NCE
> Compliance Engineer
> Harman Specialty Group
> 3 Oak Park Drive
> Bedford, MA 01730
> Phone: (781) 280-0406
> Email: [log in to unmask]
> Web: www.harmanspecialtygroup.com
>
>
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