1. Change layout 2. Via cap filling 3. Plugging from one side only (component side). Reuven On Fri, Jun 17, 2011 at 7:59 PM, Richard D. Krug <[log in to unmask]> wrote: > We've got a customer's PWB that has vias with the barrel either coated with > solder mask or epoxy filled, then covered with solder mask. The plugging > tends to leave a small protrusion above the copper surface. Some of these > locations happen to be centered at MELF locations. During reflow, MELF's > shift off the high point. > > Prevention / mitigation ideas anyone? > > > Dick Krug, SSBB, CSMTPE > SMT Process Engineer > Sparton Corporation > 30167 Power Line Road > Brooksville, FL 34602-8299 > p (352) 540-4012 (Internal Ext. 2012) > [log in to unmask] > > ______________________________________________________________________ > 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 16.0 > 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 > For additional information, or contact Keach Sasamori at [log in to unmask] or > 847-615-7100 ext.2815 > ----------------------------------------------------- > -- Best Regards, *Reuven Rokah* Mobile: 972-52-60-120-18 Tele-fax: 97239360688 <http://www.rokah-technologies.com/>[log in to unmask] [log in to unmask] www.rokah-technologies.com ** ______________________________________________________________________ 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 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------