It still a bad thing... it is good if the only one got caught...and less than 3.15 microinch...jk On Oct 1, 2007, at 1:58 PM, Tempea, Ioan wrote: > Jack, > > looks like you're OK. As per IPC-A-600G, 3.3.12, you are good even > for class 3, that accepts wicking < 80microns = 3.15 microinch. > > You lucky you! > > Ioan > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]]On Behalf Of Guy Ramsey > Sent: Monday, October 01, 2007 1:31 PM > To: [log in to unmask] > Subject: Re: [TN] Is This a BAD Thing? > > > It can be. It is called wicking. The acceptance criteria are in IPC- > A-600F > 3.3.11 Wicking ............................................ 86 > 3.3.11.1 Wicking, Clearance Holes ................ 87 > > I don't have a copy here. But, those look pretty long. I think the > specification goes to electrical clearance. > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson > Sent: Monday, October 01, 2007 12:56 PM > To: [log in to unmask] > Subject: [TN] Is This a BAD Thing? > > I'm not accustomed to looking at reliability issues, (my designs > are usually > so perfect... (grin)) so every time I see an X-Ray or a cross- > section I get > nervous wondering what I'm actually seeing. > > Can anyone explain what the following picture means? > > http://www.frontdoor.biz/PCBportal/208what.jpg > > onward thru the fog, > Jack > > --------------------------------------------------- > 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 > ----------------------------------------------------- > > --------------------------------------------------- > 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 -----------------------------------------------------