---------Included Message---------- > From: "Chris Robertson" <[log in to unmask]> > Subject: Re: [DC] Blind and Buried Vias > > Not debating it I just want to find out what annular ring > you are using? (collecting data) Hi Chris, Have you seen what the latest IPC specs recommend for annular ring, and are you using it? It used to call out .005" external and .002" internal; now it's half that. Is anyone using these "most stringent" requirements? I'd really like to know. The manufacturing engineer I worked with didn't really seem conceerned when I pointed it out, since we add in so many other tolerances. Just wondering... :) Have a great Easter. Mitch _____________________________________________________________ Tired of limited space on Yahoo and Hotmail? Free 100 Meg email account available at http://www.dacafe.com --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------