Could someone please give me a general guideline concerning the additional cost of using blind vias on a PCB? Perhaps there is someone out there in the PCB fabrication business or a fellow designer that has done some extensive research into this? I posted the above questions to the IPC Designer Council forum last week and have not, to date, received a single, helpful response. Perhaps someone here can help answer these questions. The following is from a follow-up posting to the DC forum - I think it appropriate to post it here, as well, as food for thought - In a recent posting, Your Opinoin Needed - Designers Learning Symposium, I notice that blind and buried vias were included in the 'newer technologies' category. I also find that most designers are reluctant to use blind and/or buried vias, for various reasons. Blind and buried vias have been around for over a decade, they are not new. I have a great article from the March 1988 issue of PCD magazine talking about the use of blind and buried vias down to 2 mils in size! I am frustrated that PCB fabricators are failing to keep up with the industry they support and continue to charge excessive prices for such an old process. Much of today's technology require the use of blind and/or buried vias - I say it is time for designers to get over their paranoia and for fabricators to stop taking advantage of it! Isn't it time we stopped considering blind and buried vias as a 'new technology'? Ray Humphrey Senior PCB Designer Maxim Integrated Products --------------------------------------------------------------------------------- Technet 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 Technet To temporarily halt delivery of Technet send the following message: SET Technet 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 ---------------------------------------------------------------------------------