A quick thought:
If the losses of larger profile components are in the wave it could be due
to the amount of adhesive you can put down with your stencil.
Possibly the print pump technique [from Dek I think, maybe others] could
help here? This is a bit like dispensing paste with a printer and allows
different blob heights from a single pass.
Regards
Mike Fenner
Indium Corporation
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gary Camac
Sent: Tuesday, January 15, 2008 1:01 PM
To: [log in to unmask]
Subject: Re: [TN] Bottom side SMT adhesives
Larry,
You don't say where you are loosing your components. Handling prior to wave
or at the wave or a combination of both?
The best smd adhesive I ever ran was an Ashai (sp) product that used to be
sold by Multicore, but it went away when Loctite took them over. In my
shear tests on this product, I would break the solder mask loose from the
PWB or would break the 1206 test resistor before the smd adhesive bond
would break. GOOD STUFF - but I have not been able to find it since
Multicore stopping selling it, and believe me I have tried.
Good luck,
Gary Camac
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Davis, Larry
Sent: Friday, January 11, 2008 11:38 AM
To: [log in to unmask]
Subject: [TN] Bottom side SMT adhesives
Happy Friday Everyone!
We are currently stencil printing Loctite 3612 for our bottom side SMT
parts. We have trouble getting larger parts (SOL's, tantalums, etc) to stay
attached consistently. I'm just wondering what products others are using
for this process and if anyone has had the same issue.
Thanks and have a great weekend!
Larry
This message (including any attachments) contains confidential and/or
proprietary information intended only for the addressee.
Any unauthorized disclosure, copying, distribution or reliance on the
contents of this information is strictly prohibited and may constitute a
violation of law. If you are not the intended recipient, please notify the
sender immediately by responding to this e-mail, and delete the message from
your system. If you have any questions about this e-mail please notify the
sender immediately.
---------------------------------------------------
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 email, its content, and any files transmitted with it, are intended solely for the addressee(s) and may be legally privileged and/or confidential. If you are not the intended recipient, please contact the sender by return and delete the material from any computer. Any review, retransmission, dissemination, or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited.
Messages sent via this medium may be subjected to delays, non-delivery, and unauthorized alteration. This email has been prepared using information believed by the author to be reliable and accurate, but Indium Corporation makes no warranty as to accuracy or completeness. Indium Corporation does not accept responsibility for changes made to this email after is was sent. Any opinions or recommendations expressed herein are solely those of the author. They may be subject to change without notice.***"
---------------------------------------------------
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
-----------------------------------------------------
|
