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April 1999

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Subject:
From:
Albert Mok <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Sat, 10 Apr 1999 20:24:33 +0800
Content-Type:
text/plain
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text/plain (35 lines)
Dear Chris,

I appreciate your quick response.  We have to consider the end of pipe
treatment.  Please explain more clearly what are the full name TMAH and MEA
and how the spent solution can be treated.


At 08:02 AM 4/10/99 EDT, [log in to unmask] wrote:
>It is never a good idea to strip dry film with caustic if you are using tin
>as an etch resist. Especially at 150 degrees. The tin is attacked and then
>redeposited n the copper as you suggest. I would recommend using a
>proprietary product that would not contain caustic or KOH. These are usually
>TMAH & MEA based and they run at temperatures more like 130 degrees. We
>supply many of these strippers to the industry as we are a major supplier of
>SES chemistry. Fell free to contact me at Dexter Electronic Materials
>@1-800-877-9871 ext. 209.
>
>Regards,
>Chris McGary
>Dexter
>
>

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