No coating.
Inge
----- Original Message ----- 
From: "Roberts, Jon (SA-1)" <[log in to unmask]>
To: "TechNet E-Mail Forum" <[log in to unmask]>; "Inge" 
<[log in to unmask]>
Sent: Thursday, September 03, 2009 9:39 PM
Subject: RE: [TN] BGA Pb-free, this is what I feared: Tin whiskers


Since you are taking questions, is the CCA coated and if so what kind of
coating?  Thanks Jon

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
Sent: Thursday, September 03, 2009 2:37 PM
To: [log in to unmask]
Subject: Re: [TN] BGA Pb-free, this is what I feared: Tin whiskers

It's believed to be Tin/Bismuth directly on Copper (beware) and a
extraordinary thick solder mask.  I'll take a closer look 2morrO.
Inge

----- Original Message ----- 
From: "David D. Hillman" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, September 03, 2009 9:24 PM
Subject: Re: [TN] BGA Pb-free, this is what I feared: Tin whiskers


> Hi Inge - what is the pwb finish?
>
> Dave Hillman
> Rockwell Collins
> [log in to unmask]
>
>
>
> Inge <[log in to unmask]>
> Sent by: TechNet <[log in to unmask]>
> 09/03/2009 02:15 PM
> Please respond to
> TechNet E-Mail Forum <[log in to unmask]>; Please respond to
> Inge <[log in to unmask]>
>
>
> To
> [log in to unmask]
> cc
>
> Subject
> [TN] BGA Pb-free, this is what I feared: Tin whiskers
>
>
>
>
>
>
> We have HASL and via-in-pad. Electrical issues, disturbed signals.
There
> were hundreds of Tin whiskers on inside of the unfilled vias, and even
> whiskers from solder pads circumperiphery, pointing at the nearby
solder
> pads. I suspect that the signal failures are caused by CAFs. Have any
of
> you
> seen a connection between the presence of Tin whiskers and CAF growth?
>
> All BGA via-in-pads are solder mask defined. If you want photos, I can
> send
> a couple to the PA immigrant.
>
> /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
> -----------------------------------------------------
>
>
> ---------------------------------------------------
> 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
> ----------------------------------------------------- 

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

This communication is intended only for use by the addressee(s) named herein 
and may contain business confidential and/or legally privileged information. 
If you are not the intended recipient of this e-mail, you are hereby 
notified that any dissemination, distribution, disclosure or copying of this 
e-mail and its contents is strictly prohibited. If you have received this 
e-mail in error, kindly notify the sender by replying to this message. In 
addition, please permanently delete the message and any attachments without 
copying or disclosing the contents. Thank you for your cooperation.
THIS DOCUMENT AND/OR SHIPMENT MAY CONTAIN COMMODITY ITEMS, SOFTWARE OR 
TECHNICAL DATA THAT IS CONTROLLED BY U.S. EXPORT LAW, AND MAY NOT BE 
EXPORTED OUTSIDE THE UNITED STATES OR TO NON U.S. PERSONS WITHOUT THE 
APPROPRIATE EXPORT LICENSE FROM EITHER THE U.S. DEPARTMENT OF STATE OR 
DEPARTMENT OF COMMERCE. 

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