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May 2009

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Subject:
From:
"Whittaker, Dewey (EHCOE)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Whittaker, Dewey (EHCOE)
Date:
Mon, 11 May 2009 08:43:29 -0700
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So, since we are speaking of a vacuum deposition process, a Blonde was
asked if she were in a vacuum, would she be able to hear. Is it on or
off was her reply. May I please have a copy of that data?
Dewey

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Karen Tellefsen
Sent: Monday, May 11, 2009 8:31 AM
To: [log in to unmask]
Subject: Re: [TN] Parylene Adhesion Tape Test

Very silly response to unclear English.

Paralene, when applied over some no-clean wave-soldering and solder
paste
flux residiues, does not provide good protection.

I miss Al Schneider.

Karen Tellefsen - Electrical Testing
[log in to unmask]
908-791-3069




So are you telling us not to use Al Schneider or no-clean soldering
materials?
Dewey

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Karen Tellefsen
Sent: Monday, May 11, 2009 6:34 AM
To: [log in to unmask]
Subject: Re: [TN] Parylene Adhesion Tape Test

At Nepcon west 1999, Al Schneider presented some work  I did on Paralene
and no-clean soldering  materials with disappointing results.  If anyone
wants a copy, email me.

Karen Tellefsen - Electrical Testing
[log in to unmask]
908-791-3069





             Mary Lou Sachenik




Subject
             05/09/2009 07:59          [TN] Parylene Adhesion Tape Test

             AM





             Please respond to

              TechNet E-Mail

                   Forum

             <[log in to unmask]>


                    OM>









We recently had some issues with lack of adhesion of Parylene coating

What types of notes are being used on drawings to define parylene
conformal coating adhesion test on pwa's?
Is the ASTM3359-08 (for assessing the adhesion of coating films to
metallic substrates) the best spec to call out for this testing .
I presently don't have pwb coupons to perform destructive cross hatch
test.

What type of tape is being used testing parylene adhesion on the PWA's?
Some specs call out 3M-250 tape, the ASTM D 3359 calls out the Permacel
99.
Actually I prefer the Wescorp 79210 clear Anti-static Tape, does this
seem
acceptable?

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