4 Oct
2000
4 Oct
'00
5:16 a.m.
"John Allain" <John.Allain(a)donnelley.infousa.com> wrote:
Actually I hoping that someone had neat stories on
Hi John
The lids you are talking about are quartz windows in
ceramic lids. From what I remember, the quartz is melted
into the ceramic and then allowed to cool. The ceramic
doesn't melt and has a slightly higher coefficient of
expansion. This forms a air tight seal. It is done
in an induction oven under a soft vacuum so heating isn't
a big issue.
Dwight
How< Quartz could be molded like glass so
cheaply.
I get the impression that there is nothing special about
EPROM windows... until you hear that they're Quartz.
John A.