Hey Thanks for your help. Do you find that through hole diameter is important? The pad size is 1.2mm square and I am putting 0.75mm holes in them. This would best be directed to the people who will make these moduels for us but I am in Australia. I am still looking for somebody here. We think in Metric ;) Rod. On Wed, 2004-12-08 at 04:27, Brooks,Bill wrote: > I have done this "half-a-hole" castellation on some .032 thick > fiberglass/epoxy material, multilayer... with very small vias and a 0.8mm > pitch BGA mounted to it... > > We built the 'chip carriers' into a panel... and the board house routed out > the 1/2 a plated thru hole by drilling an extra hole tangent to the main > hole and then routing them in half. > > There was some de-burring to do on some of them until they got the process > down... > > There is a picture of the board on my website. Also check the FAQ area and > look at the close-up view of the castellation holes. http://pcbwizards.com > > The shop that did the work for me is Hughes Circuits in San Marcos > California. Talk with Jerry or his son Jeff Hughes and they can explain the > process. > > > Bill Brooks - KG6VVP > PCB Design Engineer , C.I.D.+, C.I.I. > Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510 > e-mail:[log in to unmask] > http://www.dtwc.com > http://pcbwizards.com > > > -----Original Message----- > From: Roderick Taylor [mailto:[log in to unmask]] > Sent: Tuesday, December 07, 2004 12:20 AM > To: [log in to unmask] > Subject: [TN] PTH cut in half to make SMT pads > > Hi, > > Some surface mount modules that I bought are made from regular PCB > material and the mounting pads seem to be plated through holes cut in > half. > > I can't buy those modules anymore and the manufacturers have made lots > of our product but without these modules. I need to make an adaptor pcb > and doing it the way the orignal modules were made seems to be the > easiest. > > They are just PTH cut in half with a nice cutting tool aren't they? Or > are they a PCB with half of the PTH on the PCB and the other half > falling off the side? > > If I went to our rapid prototyping people with this on our PCB would > they understand? Do you understand what I mean? > > Rod. > > --------------------------------------------------- > 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 > ----------------------------------------------------- > > --------------------------------------------------- > 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 > ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------