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August 2005

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Subject:
From:
Joseph Matthews <[log in to unmask]>
Reply To:
(Designers Council Forum)
Date:
Thu, 4 Aug 2005 09:31:13 -0700
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Hi Billy,

3M (and presumably others) make a static-free tape -- in 3M's case its "42-Tape" I beleive, that's designed to be used in wave soldering.  This is the answer to the static issue.  Masking tape does produce static electricity both when you remove it form the roll and when you pull it off the components.  Does that impact the components?  Answer is, it could.  CMOS and HCMOS parts being especially susceptable to static electricity.  Point is, they make tapes for specifically this purpose and you may want to google "Static-Free Tape" and see what comes up (use the quotes and it'll look for the explicit string).

Hope this helps.

Joe

Billy Bharath <[log in to unmask]> wrote:
Hi All,
I seek your professional and or experience on this subject. A
certain process in the our assembly requires lengths of masking tape to be
stuck over components for later removal. An engineer argues that the removal
of the masking tape generates static which could damage the component.
Trouble is this practice has been in existence for few years with very
little rejects experienced. I am looking for any literature that supports or
rejects the engineers observations.
any assistance will be greatly appreciated.
Billy Bharath
Prism "Trusted Transactions"
Kwa-Zulu Natal
South Africa

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