[PCB_FORUM] Re: bead probe
- From: "Eileen Ong" <eileen.ong@xxxxxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Sat, 28 Apr 2012 14:15:54 +0800
Karen,
can you share the padstack for bp, thanks. Do you create multiple one at
different rotation and angles?
Thanks.
Eileen
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-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx on behalf of Kathleen Descoteaux
Sent: Fri 4/27/2012 7:22 PM
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
To: 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.
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