Need help identifying the following IC/CHIP

From: Dwight Elvey <elvey_at_hal.com>
Date: Wed Oct 4 12:16:14 2000

"John Allain" <John.Allain_at_donnelley.infousa.com> wrote:
> >
> Actually I hoping that someone had neat stories on
> >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.

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
Received on Wed Oct 04 2000 - 12:16:14 BST