Sam, Thanks, for the life of me could not think of the word counter bore before, in my last post. Bob Wolfe
----- Original Message ----- From: "Samuel Cox "Sam"" <[EMAIL PROTECTED]> To: "Protel EDA Forum" <[EMAIL PROTECTED]> Sent: Wednesday, January 09, 2002 11:51 AM Subject: Re: [PEDA] Countersunk holes > Sean, > Counter Sink holes are used often for mounting holes for BGA devices.. > especially in > performance boards.. (DUT) Device Under Test boards where they are > mounting a socket that will accept a number > of component loads for each chip test.. If you send me your fax number I > have a > detail drawing of commonly used counter sink as as well as counter bore > holes ... I do not have it electronically.. > You may also find it on any number of PCB or IPC web sites.. > > As the other gentlemen have stated.. one of the biggest problems is not > allowing enough trace and internal > plane clearance around the hole.. Generally it is a series of drilling > steps.. one for the center hole that the > screw shaft will penetrate and then the second is sink hole or bore hole . > It is that sink or bore hole that > is larger and often not cleared. > > Sam Cox > [EMAIL PROTECTED] > > > > > > > At 08:15 AM 1/9/2002 -0500, you wrote: > >This may be a long shot - Has anybody konw if it's possible to use c'sk > >holes on a PCB? > >Sean James > >PCB Designer > >Telecast Fiber Systems, Inc. > >102 Grove Street > >Worcester, MA 01605 > >(TEL) 508.754.4858 x33 > >(FAX) 413.541.6170 > > > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
