OT: re: drilling a hole through a Pentium chip

[Michael Iott]

Say Ben,

Did you try a bullet?

Mike Iott

Dale Grover wrote:

> Two thoughts:
>
> 1  Don't drill a hole--attach a loop to some metal pin/pad.
> If PGA, I'd just shear off all the pins, leaving pads on
> back, then take a piece of copper, brass, or tin-plated
> steel and solder it on.  (Epoxy would work too.)  BTW, MSU
> salvage probably has a bunch of these for cheap, if you need
> a few tries to get it right--or have friends who need key
> chains too.
>
> 2  HSS (high speed steel--typical drill bit) definitely
> won't hack it.  I don't think even carbide drill bits would
> be happy, but I could be wrong.  Diamond-based abrasives or
> cutting tools will do it.  Patience, a hardwood dowel, drill
> press, and some abrasives would also do it, just take
> longer.  If possible, much easier to go with #1.  Ceramics
> don't like being cut with everyday tooling.  But many
> ceramic packages are a sandwich, and can be split along the
> cement line to reveal the chip inside.  Much nicer than a
> monolithic ceramic package, no?
>
> Ceramics are neat materials, but not as easy to play with as
> plastics and metals.  Given the forces involved, Intel (and
> everyone else) needs a pretty rugged package to handle the
> non-zero force per pin x many many pins.  Then add amazing
> heat flow.  Coefficient of expansion close to silicon.
> Etc., etc.  Lots of engineering that goes *around* the chip,
> not just in it.  Still a bit strange that, susceptible as it
> is to a tiny static discharge, an IC can be physically
> almost bullet proof.  Or Ben proof :)
>
> --Dale
> _______________________________________________
> linux-user mailing list
> linux-user@egr.msu.edu
> http://www.egr.msu.edu/mailman/listinfo/linux-user