27 Jan
2006
27 Jan
'06
3:31 p.m.
On Tue, 24 Jan 2006 15:09:33 -0800 (PST)
Chris M <chrism3667 at yahoo.com> wrote:
At one point I had a lot of house-marked ceramic chip packages
that I thought were DRAM but couldn't be certain of. Since they
were in cerdip packages, it was easy to use a cold chisel to
split one of them open. And I used a microscope to look at the
die, and sure enough, it was marked as a 4116 DRAM part. I used
the rest of the parts as 4116s. This would be MUCH more
difficult with plastic parts.
And I was a
bit disappointed that
he didn't grind
I've been dying to ask this question. Can you
actually learn something (hopefully a whole lot!)
about a chip if you actually did this??? What if there
was some old chip for which there is no documentation.
If, given the availability of the proper equipment
(surface grinder?), you were able to take off say
.0001" of material at a time, or thereabouts ;), would
you have the ability to photograph it, and have
something in the way of a working schematic?
down the top of the failed chip to do a proper
repair. :-)