Ted
I would clean them with a strong water soluble flux to hopefully remove the intermetallic and then if possible solder dip them to provide a solderable surface. If that is not practical, I would apply the solder paste immediately after cleaning.
Good luck
Lee
----- Original Message -----
From: Ted Tontis<mailto:[log in to unmask]>
To: TechNet E-Mail Forum<mailto:[log in to unmask]> ; Lee parker<mailto:[log in to unmask]>
Sent: Monday, April 04, 2005 10:57 AM
Subject: RE: [TN] Immersion Silver
If that where the case how would you go about getting those
joints to reflow. I ask because we have some boards that look as you
describe and solder just as you describe, our AOI machine is spitting
them out like crazy.
Regards,
Ted
-----Original Message-----
From: Lee parker [mailto:[log in to unmask]]
Sent: Monday, April 04, 2005 8:50 AM
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: Re: [TN] Immersion Silver
Kaye
Are you sure it is silver? Immersion silver is normally applied after
soldermask. What What you are seeing may be the tin that was used as an
etch resist and not completely removed. If this is the case these boards
will be difficult to solder.
Best regards
Lee
----- Original Message -----
From: Kaye Clayo<mailto:[log in to unmask]<mailto:[log in to unmask]>>
To: [log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]>>
Sent: Friday, April 01, 2005 2:27 PM
Subject: Re: [TN] Immersion Silver
From all that I have read, the immersion silver finish should be
the very last process step before drying & packaging.
Kaye
At 08:42 AM 4/1/2005, you wrote:
>Good Day All:
>
> A question arose at our factory regarding immersion silver
surface
>finish. We recieved boards where the solder masking was applied after
the
>immersion silver was applied to the PWB. Are there potential solder
mask
>adhesion issues with this? Should the solder mask be applied prior to
>adding the surface finish? Any insight would be appreciated. Thanks.
>
>Regards,
>Steve Vargas
>
>---------------------------------------------------
>Technet Mail List provided as a service by IPC using LISTSERV 1.8e
>To unsubscribe, send a message to
[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:[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]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:[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]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]>>: SET Technet Digest
>Search the archives of previous posts at:
http://listserv.ipc.org/archives<http://listserv.ipc.org/archives<http://listserv.ipc.org/archives<http://listserv.ipc.org/archives>>
>Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16<http://www.ipc.org/cont<http://www.ipc.org/contentpage.asp?Pageid=4.3.16<http://www.ipc.org/cont>
entpage.asp?Pageid=4.3.16> for additional information, or contact Keach
Sasamori at [log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]>> or 847-615-7100
ext.2815
>-----------------------------------------------------
>
>_______________________________________________________________________
______
>Scanned by IBM Email Security Management Services powered by
MessageLabs. For more information please visit
http://www.ers.ibm.com<http://www.ers.ibm.com/<http://www.ers.ibm.com<http://www.ers.ibm.com/>>
>_______________________________________________________________________
______
CONFIDENTIALITY NOTE: This message is intended only for the use of the
individual or entity to which it is addressed and may contain
information that is privileged, confidential, and exempt from disclosure
under applicable law. If the reader of this notice is not the intended
recipient, you are hereby notified that any dissemination, distribution
or copying of this communication is strictly prohibited. If you have
received this communication in error, please notify the sender
immediately.
________________________________________________________________________
_____
Scanned by IBM Email Security Management Services powered by
MessageLabs. For more information please visit
http://www.ers.ibm.com<http://www.ers.ibm.com/<http://www.ers.ibm.com<http://www.ers.ibm.com/>>
________________________________________________________________________
_____
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to
[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:[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]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:[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]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]>>: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives<http://listserv.ipc.org/archives<http://listserv.ipc.org/archives<http://listserv.ipc.org/archives>>
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16<http://www.ipc.org/cont<http://www.ipc.org/contentpage.asp?Pageid=4.3.16<http://www.ipc.org/cont>
entpage.asp?Pageid=4.3.16> for additional information, or contact Keach
Sasamori at [log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]>> or 847-615-7100
ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask]<mailto:[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]<mailto:[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]<mailto:[log in to unmask]>: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives<http://listserv.ipc.org/archives>
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16<http://www.ipc.org/contentpage.asp?Pageid=4.3.16> for additional
information, or contact Keach Sasamori at [log in to unmask]<mailto:[log in to unmask]> or 847-615-7100
ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
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
-----------------------------------------------------
|
