Craig,

This info should guide you in the absence of specific mfg data. 
J-STD-033B, para. 5.4.5, Maximum number of reflows: A maximum of three
reflow passes is allowed per component. If more than three are required
for any reason, the supplier must be consulted (reference J-STD-020).
Components rated under J-STD-020D.1 must withstand 3 reflows to qualify
(ref. 5.6).

Best Regards,
-Joe M.


"This e-mail and any attachments are solely for the use of the addressee and may contain L-3 proprietary information that may also be defined as U.S. Government export controlled technical data. If you are an unintended recipient of this e-mail, use, disclosure or distribution of its content is prohibited. Please notify the sender by return e-mail and immediately delete this message."
 
From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig Sullivan
Sent: Tuesday, September 21, 2010 8:28 AM
To: [log in to unmask]
Subject: [TN] Maximum Number of Reflows for QFN

I should already know where to find this but I'm stuck. Can anyone tell
me a
document number to look for the maximum number of reflows that a QFN can
be
subjected to? 

 

Craig Sullivan

Manufacturing Engineer

MPL Incorporated

P: 607.266.0480

F: 607.266.0482

[log in to unmask]

 

Export Control:
This message is intended only for the addressee and may contain
information
that is company confidential or privileged.  Any technical data in this
message may be exported only in accordance with the U.S. International
Traffic in Arms Regulations (22 CFR Parts 120-130) or the Export
Administration Regulations (15 CFR Parts 730-774). Unauthorized use is
strictly prohibited and may be unlawful. If you are not the intended
recipient, or the person responsible for delivering to the intended
recipient, you should not read, copy, disclose or otherwise use this
message. If you have received this email in error, please delete it, and
advise the sender immediately. 

 



______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask] 
______________________________________________________________________

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

-----Original Message-----

______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

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