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January 1999

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Subject:
From:
Matthew Park <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 6 Jan 1999 10:46:02 -0800
Content-Type:
text/plain
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text/plain (97 lines)
Ken,

OSP coated boards are tested electrically before the coating is
applied by fab houses.  The coating is applied at last fabrication
process step just before packaging and shipping.

Matthew
Norsat International Inc.

>>> Ken Patel <[log in to unmask]> January 6, 1999  9:31 am
>>>
Meaning OSP bare boards are not being tested before shipment
to customer by
fab house?

Can anyone explain this? I am currently going through proto run
and would
like to more about OSP.

re,
Ken Patel

At 04:08 PM 1/5/99 -0600, Seth Goodman wrote:
>In looking for alternatives to HASL finished boards, several
suppliers have
>mentioned immersion white tin.  Since it is a conductive
surface, whereas
>OSP is not, the finished board can be electrically tested.  My
question
>concerns tin whisker growth.  Is this a problem for a chemically
deposited
>finish like this, or does this only occur with electroplated tin
finishes?
>
>What kind of experiences or opinions do folks have concerning
immersion
>white tin compared to OSP and immersion gold over nickel?
>
>Seth Goodman
>Goodman & Associates
>7687 Leta Way
>Verona, WI 53593
>Tel (608)833-9933
>Fax (608)833-9966
>
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______________________________________________________
Ken Patel                       Phone:  (408) 490-6804
1708 McCarthy Blvd.             Fax:    (408) 490-6859
Milpitas, CA 95035              Beeper: (888) 769-1808

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