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November 2003

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Subject:
From:
"Cagle, James" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 11 Nov 2003 10:18:06 -0500
Content-Type:
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text/plain (63 lines)
A company called ASC ( http://www.ascinternational.com ) makes a great
solder paste measurement the cover the whole pad (milt-beams instead of only
one), has a programmable table and made by engineers that left Cyberopitics.
This allows to see the whole pad height, width, and volume. It also has
other uses. We all this said, are you measuring the fine pitch or anything
in the corners? What problems are you having that is of concern?
>
>                                  James Cagle
> Tyco Printed Circuit Group-Hayward Division
>
>               email: [log in to unmask]
>

>
>
>  -----Original Message-----
> From:         Jackie Stewart
> Sent: Tuesday, November 11, 2003 12:44 AM
> To:   [log in to unmask]
> Subject:      Paste Height Measurements
>
> All,
>
> Can you recommend a tool or technique for our operators to use in
> monitoring the solder paste height on a stencil?
>
> We have an LSM and currently check all four corners of a board every hour.
> This method, however, doesn't seem to be adequate.  We've thought about
> increasing the frequency, but are open to other suggestions.
>
> Metal sqeegees would probably minimize our problem, but much work would
> have to be performed before qualifying such a change in our process.
>
> Thanks in advance for your advice.
>
> Jackie Stewart
> Process Engineer
> Keihin Carolina System Technology, Inc.

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