Hi Inge!
Your pictures are up! Go to: http://www.stevezeva.homestead.com and look
for; "PWB Fresh, and PWB Used".
That is pretty weird looking! Is that the white stuff you were talking
about where
you printed your last name?
I've never used any teflon fabs here, so I don't have a clue about them...
Kind regards,
-Steve Gregory-
Senior Process Engineer
LaBarge Incorporated
Tulsa, Oklahoma
(918) 459-2285
(918) 459-2350 FAX
|---------+--------------------------------->
| | "Ingemar Hernefjord |
| | (KC/EMW)" |
| | <ingemar.hernefjord@ER|
| | ICSSON.COM> |
| | Sent by: TechNet |
| | <[log in to unmask]> |
| | |
| | |
| | 04/21/2005 09:49 AM |
| | Please respond to |
| | TechNet E-Mail Forum; |
| | Please respond to |
| | "Ingemar Hernefjord |
| | (KC/EMW)" |
| | |
|---------+--------------------------------->
>--------------------------------------------------------------------------------------------------------------|
| |
| To: [log in to unmask] |
| cc: |
| Subject: [TN] Copper traces too, but Rogers this time |
>--------------------------------------------------------------------------------------------------------------|
Hi all,
anyone who have this experience?
A. Peel fresh PWB: high force needed, white stuff left on board. Soft like
butter. Copper underside yellowish.
B. Peel used PWB: much lower force needed, no white stuff left on board.
Copper underside brown-blue-redish.
Reason for asking is this. We suspect that something bleeds out from
beneath the copper traces during the
VIGON cleaning. Not much, but sometimes creating kind of 'grease' along the
copper traces. Therefore, I'm
interested in the interface between the copper and the teflon. What stuff
can there be that changes from white to colourless, and may be dissolved by
VIGON.
Sending two pics to the always and amazingly tolerant, patient and positive
S.G.
Ingemar Hernefjord
Ericsson Microwave Systems
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