Kathy, Do you have a link describing bead probe technology? Thx Dave Dave Seymour Ixia www.ixiacom.com<http://www.ixiacom.com> 919.267.4840 From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Kathleen Descoteaux Sent: Friday, April 27, 2012 7:22 AM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Re: bead probe Hi Eileen.. Yes, I've done several designs using beadprobes. They are a PCB designers dream :-) The bp is via.. the one I am using has 20x5 etch, soldermask and solderpaste pad. In addition, I use the filmmask layer to add another pad, 25x7, which is used by the fabricator for a mask to apply the beads. These sizes were used for 100 mil spaced bead probes. I placed these guys right on super high speed diff pairs, top and bottom layers to eliminate the need for via stubs. Agilent has some documentation available for recommended sizes.. as like standard testpoints, the size of the bead probe will vary with the size of the test head. I would suggest that you contact your testhouse to get their specific requirements... best of luck! Kathy Descoteaux ________________________________ From: eileen.ong@xxxxxxxxxxxxxx<mailto:eileen.ong@xxxxxxxxxxxxxx> To: icu-pcb-forum@xxxxxxxxxxxxx<mailto:icu-pcb-forum@xxxxxxxxxxxxx> Subject: [PCB_FORUM] bead probe Date: Fri, 27 Apr 2012 14:01:11 +0800 Hi, Any one has board design for Bead probe? What are the size for padstack, solder mask/paste mask and clearance set for bead probe ? Is this being added as a part or Via and if it's added in schematic. Thanks. Confidential/Privileged information may be contained in this email. If you are not the intended recipient, please do not copy, distribute or use it for any purpose, nor disclose its contents to any other person. Please notify the sender immediately if you receive this in error.