Kevin
I have worked with the Direct FET from Intl Rectifier for both cleaned  
samples and not cleaned and with the 4-5 mil standoff they have worked very  well.  
Cleaning by water only is difficult but can be done with long  contact times, 
but cleaning with saponifier has been run effectively at 3-4  ft/min.  The 
increase standoff height have worked well to allow for proper  venting of the 
flux residues leaving the residue benign  and protective.  The Direct FET is a 
better performer due to  flux residues than the QFN components. 
 
Call if you would like to discuss the issue further. 
 
Terry Munson
Foresite
765-457-8095 
 
 
In a message dated 11/3/2008 10:11:52 A.M. Eastern Standard Time,  
[log in to unmask] writes:

Yes,  they seem all the rage right now.
Dewey

-----Original  Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kevin  Glidden
Sent: Monday, November 03, 2008 6:39 AM
To:  [log in to unmask]
Subject: [TN] Intl Rectifier Direct FET

Is anyone  out there using these?  While attractive from a design and
performance  standpoint, it seems like it would be a cleaning nightmare
whether using  water soluble or  RMA.



http://www.irf.com/technical-info/appnotes/an-1035.pdf



http://www.irf.com/technical-info/appnotes/an-1050.pdf







Kevin  Glidden

Manufacturing Engineer

Luminescent Systems  Inc.


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

**************Plan your next getaway with AOL Travel.  Check out Today's Hot 
5 Travel Deals! 
(http://pr.atwola.com/promoclk/100000075x1212416248x1200771803/aol?redir=http://travel.aol.com/discount-travel?ncid=emlcntustrav00000001)

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