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| From [log in to unmask] Mon Feb 3 09: |
52:07 1997 |
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Wed, 29 Jan 1997 12:34:07 -0500 |
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id m0vpdmy-0000jPC; Wed, 29 Jan 97 11:27 CST |
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"Luis Rivera" < [log in to unmask]>
"FAB: Horizontal versus vertical etching" (Jan 28, 2:51pm) |
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Luis,
Vertical etchers require carefull adjustments for the thin laminates to
be transported through the machine. Whereas this is also true for
horizontal, it is more so in vertical.
Bottom line, the horizontals will perform with less tender loving care,
meaning fewer innerlayers in the sump, or all jammed up in the etcher.
Horizontal works pretty well for develop. Would not touch it for strip.
I haven't looked at machines for about 2 years. Things may have
changed, but....
(I came up with this really cool leader design, er, well I guess we all
have, at one time or another. Definition: A leader is used to attach to
a thin laminate to help it go through the etcher / stripper. A manual
process technique.)
--
George Franck Jr
Raytheon E-Systems
Falls Church Va.
"The opinions expressed are those of the author, and are not necessarily those of the Raytheon Corporation."
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