Need help identifying the following IC/CHIP

From: Eric Smith <eric_at_brouhaha.com>
Date: Tue Oct 3 14:15:51 2000

I wrote:
> Hopefully a *quartz* window. Otherwise it will be
> difficult to erase.

John A. wrote:
> Hey I'm just an initiate on these things. Most modern
> EPROMs seem to have poured (once liquid) windows, older
> ones have the sliced crystalline slab windows. You mean
> to say thet the solidified windows are quartz also?
> I thought the M.P. of Quartz was astronomically high.

I'm not sure. But glass is fairly opaque to shortwave UV,
so a glass window won't work too well.

I have some OKI plastic-packaged EPROMs that have a
plastic window. The window is translucent to visible
light, but apparently reasonably opaque to shortwave UV.
OKI didn't make them for very long; I guess they weren't
a big hit. I've heard that the window becomes less
transparent to UV as exposure increases.
Received on Tue Oct 03 2000 - 14:15:51 BST