Werner, Eddie, The finished hole diameter is important only in one instance - when it is used for accurately-matched TH component, such as press-fit component. It is not relevant in case of connecting via (provided it is well-designed for curent carrying and signal integrity aspects). Ofer Cohen Seabridge A Siemens Company > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier > Sent: Friday, May 13, 2005 01:48 > To: [log in to unmask] > Subject: Re: [TN] board fab > > Hi Deac, > Why is anybody still quoting finished hole diameters; for > vias we need the drilled hole diameters and the plating > thickness—the finished hole size is an anachronism left over > from through-hole technology. > > Regards, > Werner Engelmaier > Engelmaier Associates, L.C. > Electronic Packaging, Interconnection and Reliability Consulting > 7 Jasmine Run > Ormond Beach, FL 32174 USA > Phone: 386-437-8747, Fax: 386-437-8737, Cell: 386-316-5904 > E-mail: [log in to unmask], Website: www.engelmaier.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 > ----------------------------------------------------- >