No, molten solder. If one side is wave soldered, this is ideal. If it is SMT only, then a goodly dollop of solder paste on one side will do the job (I've seen companies apply this just for this purpose with a thick stencil, after applying the solder-joint paste with a normal stencil. The thick stencil has blind holes underneath to avoid flattening the component paste.) Brian Franklin D Asbell wrote: > Curious, plugging with "solder" from only one side...what process is used > for this??? Do you mean solder mask??? > > Franklin > > > ----- Original Message ----- > From: "David Douthit" <[log in to unmask]> > To: <[log in to unmask]> > Sent: Friday, October 24, 2003 1:21 PM > Subject: Re: [TN] Cleaning of via holes under components > > > >>Brian, >> >>Well said (again!!) >> >>David A. Douthit >>Manager >>LoCan LLC >> >>Brian Ellis wrote: >> >> >>>I'm a proponent of plugging -- with solder! Not only does it stop the >>>contamination problem, but it is electrically and thermally desirable, >>>as well. However, it should be done from only one side unless you like >>>to see miniature Krakatoas. >>> >>>Brian >>> >>>Paul Baine wrote: >>> >>>>Hello, >>>> >>>>One of our Design Engineers is designing a surface mount PCB >>>>assembly and would prefer not to have the via holes solder mask >>>>tented. However, he is concerned that, if he does not call up >>>>solder mask tenting on his bare PCB drawing, foreign matter could >>>>find its way into a via hole and, if a component (e.g. an IC) was >>>>mounted over the via hole, the foreign matter might not be removed >>>>during the cleaning process. >>>> >>>>Has anyone had experience with this situation? I would appreciate >>>>any help you could give me. >>>> >>>>Thanks very much in advance. >>>> >>>>Paul Baine >>>>Q.A. Manager >>>>C-Tech Ltd. >>>>Cornwall, Ontario, Canada >>>> >>>>--------------------------------------------------- >>>>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 847-509-9700 ext.5315 > >>>>----------------------------------------------------- >>>> >>>> >>> >>>--------------------------------------------------- >>>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 847-509-9700 ext.5315 > >>>----------------------------------------------------- >> >>--------------------------------------------------- >>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 > 847-509-9700 ext.5315 > >>----------------------------------------------------- >> >> > > > --------------------------------------------------- > 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 847-509-9700 ext.5315 > ----------------------------------------------------- > > --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------