> >BTW: I realy love wafer masks ... they are just a bit hard to find.
> >So if one of y'all (sp?) got some laying around ...
> >I got to ask this...what's a wafer mask...what's it look like?
> These are usually made on a glass plate. They look
> like a larger version of only one of the dies of a wafer.
> Some are actual size but most are done with steppers now days.
> The glass has a thin metal coat on one side ( mirror looking ).
> I think they use chromium but I don't recall. You can see
> that layer's detail by holding it up to the light. The metal
> has been remove in places. It is kind of like a negative and
> used the same way.
Well, the ones I have are always for a whole wafer. I never
seen masks which are just good for a single die. Also they are
usualy same size as the final wafers. Well, I guess tehre's a
lot more out there.
Gruss
H.
--
VCF Europa 4.0 am 03./04. Mai 2003 in Muenchen
http://www.vcfe.org/
Received on Thu Mar 13 2003 - 03:23:59 GMT