Ken,
        I hate to repeat what someone already said, but I think what Steven
said must be strongly reinforced.  It is absolutely correct that your screen
print and pick and place accuracy must be dead on.  Both the screen print
process and the chip shooter must be taken right to the absolute limit of
their capability.  We even go so far as to have separate offsets for each
screen print stroke.  Dial in your process on the 0402's and let the fine
pitch fall where it may.

Thanks

Ryan Grant
Advanced Technology Engineer
MCMS
(208) 898-1145
[log in to unmask]


> -----Original Message-----
> From: Ken Fong [SMTP:[log in to unmask]]
> Sent: Wednesday, July 05, 2000 8:54 PM
> To:   [log in to unmask]
> Subject:      [TN] 0402 inspection
>
> Hi, Technetter,
> Is there anyone out there using 0402 in mass production and is doing
> inspection
> on them? What is the inspection approach on such small chips? Besides,
> will the
> process control approach on 0402 be very different from that of 0805/0603?
> Thanks.
>
> Regards,
> KenF, Jul 6,00
>
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