Doesn't uChip's ProMate II PIC programmer use an
arrangement like this for the socket modules?

--Bob

On Fri, Aug 27, 1999 at 09:33:40AM -0700, Tom Handley wrote:
>    Adam, I really don't have experience here. The conductive rubber that
> is typically found in keypads/keyboards, etc, has too much resistance. As
> far as BGAs, I could look into it but I was hoping that someone would
> speak up and give the details. My `gut feeling' is that there is a good
> reason this technology is not being used in test and programming sockets.
>
>    - Tom
>
> At 11:07 AM 8/26/99 -0400, Adam Davis wrote:
> >I've heard they have test and programming sockets at a
> >huge expense.  I've also heard of a less expensive methed,
> >but requires some specialized materials:
> >
> >Think of a rubber pad, about the same width and length
> >of the BGA, and about 1-5mm thick.  The rubber pad
> >is conductive vertically (through the pad) but not
> >horizontally(along the lendth and width of it).  Place the
> >pad on a pcb with the bga pattern on it, and press the
> >bga against the pad.  Assuming it's all lined up, you're
> >all set.
> >
> >I've seen strips of rubber which are used in older calcs
> >to connect the pcb with the lcd.  I assume the rubber pad
> >has the same pronciples...
> >
> >-Adam


--
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Bob Drzyzgula                             It's not a problem
bob@drzyzgula.org                until something bad happens
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