What if I wanted to have 3 mils in the barrel wall thickness? How large a diameter hole would I need to drill it to get that in a .032 thick board? I can specify that it's okay to plate it shut... but what can I reasonably ask for thickness of plating and how big a hole will I have to specify or design it around? Bill -----Original Message----- From: George Milad [mailto:[log in to unmask]] Sent: Friday, October 05, 2007 11:30 AM To: [log in to unmask] Subject: Re: [TN] Thru vias and plating thickness in the barrel ... Most designers specify 1.0 mil in the barrel of the hole. Most board manufactures plate to that specification. You probably could get away with 0.8mils. Getting a minimum pf 1.0 mil in the hole could be challenging with aspect ratios >10:1. Regards George Milad George Milad National Accounts Manager for Technology Uyemura International Corp (UIC) 249 Town Line Rd Southington CT 06489 [log in to unmask] Cell: (516) 901 3874 ************************************** See what's new at http://www.aol.com --------------------------------------------------- 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 -----------------------------------------------------