TECHNET Archives

December 2005

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"Dehoyos, Ramon" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Dehoyos, Ramon
Date:
Wed, 14 Dec 2005 11:05:23 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (75 lines)
 
    I agree with Les Bogert, there will be salts left from the stripper that can cause dendrites; but when is done using a qualified process,
    it can be done successfully with no detrimental effects on the board performance. I have removed one side of the coating only and left the other side unaffected in a previous life. It is a little trickey but doable.
    Regards,
    Ramon
 

  _____  

From: - Bogert [mailto:[log in to unmask]] 
Sent: Wednesday, December 14, 2005 5:08 AM
To: TechNet E-Mail Forum; Dehoyos, Ramon
Subject: Re: [TN] Help with removing UR Conformal Coating


Never use Humiseal Type conformal coating remover.  This stuff is conductive and can become trapped under components causing problems. 

        ----- Original Message ----- 
        From: Dehoyos, Ramon <mailto:[log in to unmask]>  
        To: [log in to unmask] 
        Sent: Tuesday, December 13, 2005 10:35 AM
        Subject: Re: [TN] Help with removing UR Conformal Coating

                Hi Andrew:
                                Humiseal makes a UR stripper but it will remove all the coating vertically in significantly quicker time than horizontally. Under the BGAs it will remove it if the coating did not fill all the spacing under the BGA. If there is a complete fill of the spacing under the BGA, it is a different story because the horizontal distance is much greater. Perhaps damming the BGA and filling with the chemical may accomplish what you want. I would try it on a scrap board that is made of the same material. Cheers
                Regards,
                Ramón 
	
        -----Original Message-----
        From: TechNet [mailto:[log in to unmask]] On Behalf Of Joseph H. Smith
        Sent: Tuesday, December 13, 2005 9:48 AM
        To: [log in to unmask]
        Subject: [TN] Help with removing UR Conformal Coating
	
        Has anyone had experience or success with removing conformal coating for PWA that has been coated with UR coating especially using a chemical means.  I am particularly interested with how you handled coating around or under BGA's.
	
        Any help would be grateful.
	
	
        Thanks.
	
        Andrew Kettlewell
        Process Engineer
        Sypris Electronics
        Tampa, FL
        ___________________________________________________
        Try the New Netscape Mail Today!
        Virtually Spam-Free | More Storage | Import Your Contact List http://mail.netscape.com
	
        ---------------------------------------------------
        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
        -----------------------------------------------------
	
        ---------------------------------------------------
        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
        -----------------------------------------------------
	


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

ATOM RSS1 RSS2