Flash data retention after soldering

  Hello all,

I'm using AT45DB041 in my design (SPI Flash, 4Mbit), and I thinking of
preprogramming the flash before soldering it to the rest of device - this
would avoid the in-system programming. But will the Flash retain data after
soldering? 

If it would be for couple of pieces, then I wouldn't mind the in-system
programming, but as this will be done for 100's of devices, this might save
some time... 

  Regards,
  Jookie

On Jun 13, 1:22=A0pm, "Jookie" <j...@kie.sk> wrote:

> would avoid the in-system programming. But will the Flash retain data aft=
er
> soldering?

Absolutely. I don't know if there are reliability studies, but I can
tell you as a certainty that we get flash micros bulk-programmed at
distribution and we have no perceptible failure rate from this process
(nor a significant number of field returns of units that have lost
their programming at some point in the future).

>On Jun 13, 1:22=A0pm, "Jookie" <j...@kie.sk> wrote:
>
>> would avoid the in-system programming. But will the Flash retain data 
>> after soldering?
>
>Absolutely. I don't know if there are reliability studies, but I can
>tell you as a certainty that we get flash micros bulk-programmed at
>distribution and we have no perceptible failure rate from this process
>(nor a significant number of field returns of units that have lost
>their programming at some point in the future).

OK, cool :) Thank you for a reply.
Jookie

"Jookie" <joo@kie.sk> wrote in message 
news:EaKdncXDzpTMea7XnZ2dnUVZ_g6dnZ2d@giganews.com...
> >On Jun 13, 1:22=A0pm, "Jookie" <j...@kie.sk> wrote:
>>
>>> would avoid the in-system programming. But will the Flash retain data
>>> after soldering?
>>
>>Absolutely. I don't know if there are reliability studies, but I can
>>tell you as a certainty that we get flash micros bulk-programmed at
>>distribution and we have no perceptible failure rate from this process
>>(nor a significant number of field returns of units that have lost
>>their programming at some point in the future).
>
> OK, cool :) Thank you for a reply.
> Jookie

Provided all anti-static proceedures are carried out during the process.

Joe 

On Jun 13, 1:30=A0pm, larwe <zwsdot...@gmail.com> wrote:
> On Jun 13, 1:22=A0pm, "Jookie" <j...@kie.sk> wrote:
>
> > would avoid the in-system programming. But will the Flash retain data a=
fter
> > soldering?
>
> Absolutely. I don't know if there are reliability studies, but I can
> tell you as a certainty that we get flash micros bulk-programmed at
> distribution and we have no perceptible failure rate from this process
> (nor a significant number of field returns of units that have lost
> their programming at some point in the future).

I think the conclusion is probably right, but realize that flash
micros are usually a different technology and perhaps fab process from
typical high density external flashes.