[pure-silver] Re: Ilford buys Kentmere
- From: Sauerwald Mark <mark_sauerwald@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 15 Jan 2008 08:12:56 -0800 (PST)
They are usually scrap. The die can be ground up and
recycled. The surplus die would generally not be
packaged into the ceramic packages, so the actual
scrap consists of the silicon wafers themselves.
Often, we would process each wafer slightly
differently (think test strips), and pick the wafer
with the best results, and just scrap the rest, other
times we would test a large number of parts and pick
out the ones that we wanted.
--- Bill Stephenson <photographica@xxxxxxxxxxx> wrote:
> OK, I'll bite: what happens to the "several thousand
> minus 10" chips?
>
> -Bill
>
> On Jan 14, 2008, at 10:04 AM, Sauerwald Mark wrote:
>
> > I work in the Semiconductor industry, and have
> worked
> > on programs where we were producing chips for
> space
> > applications. It was not uncommon for our mimumum
> > batch size to be several thousand chips when the
> total
> > lifetime requirement was for 10 or so.
> >
> > --- Peter Badcock <peter.badcock@xxxxxxxxx> wrote:
> >
> >> Wow. I hope it lasts that long.
> >>
> >> Thanks Ole.
> >>
> >> Peter
> >>
> >> On 13/01/2008, Ole Tjugen <ole@xxxxxxxxxxxx>
> wrote:
> >>>
> >>> I meant precisely what I said. Since Ilford can
> no
> >> longer buy small
> >>> amounts of some of the critical chemicals, they
> >> must buy the whole minimum
> >>> order. In the case of one of these chemicals,
> the
> >> minimum quantity is
> >>> equivalent to 40 years use for Ilford.
> >>>
> >>> I learned this when I was on a factory visit
> with
> >> Ilford in Mobberley two
> >>> years ago.
> >>>
> >>> På Sun, 13 Jan 2008 03:22:11 +0100, skrev Peter
> >> Badcock
> >>> <peter.badcock@xxxxxxxxx>:
> >>>
> >>>> Hi Ole,
> >>>>
> >>>> what did you mean when you wrote the Ilford
> >> needs to hold 40 years of
> >>>> sensitizer dye in stock ?
> >>>>
> >>>> regards
> >>>> Peter
> >>>>
> >>>> On 12/01/2008, Ole Tjugen <ole@xxxxxxxxxxxx>
> >> wrote:
> >>>>>
> >>>>> Now they are the largest buyer of that
> chemical
> >> in Europe, and have to
> >>>>> hold enough sensitizer dye for the
> >>>>> next 40 years in stock!
> >>>>>
> >>>
> >>>
> >>>
> >>> --
> >>>
> >>> Ole Tjugen
> >>>
> >>>
> >>
> >
>
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> >>>
> >>
> >
> >
> >
> >
> >
>
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