At 11:15 AM 6/28/01 +0100, Richard Thompson wrote:
>Is it possible in protel to make a slit pad at all? we need to insert some
>power transistors after flow soldering and on a cheap board cannot have a
>pealable mask on the solder side, a slit pad would stop the pad covering
>with solder for ease of insertion. I used to just get the photoplotters to
>ammend the gerber info while using cadstar.
You can, of course, do the same with Protel -- either have the
photoplotters amend the gerber or amend it yourself.
I don't understand the reference to a slit pad not covering with solder.
"Slit pad" in the usage I know refers to a pad which is circular but which
has had segments removed from either side. The reference is to an original
way of making the pads with crepe pads: one would slit the segements off.
There were also decals made with slit pads, particularly for ICs. There is
not a lot of reason to use this kind of slit pad over using a rectangular
pad; an octagonal pad, if Protel actually supported octagonal pads instead
of merely pretending to do so, would be similar.
Any pad shape can be built up from primitives in a Protel footprint. These
primitives do not automatically assume the pad net; steps must be taken to
cause them to do so. This would be a welcome improvement (automatically
assigning component primitives in contact with a component pad the net of
the pad unless to do so created a conflict (i.e., contact with more than
one pad assigned different nets).
[EMAIL PROTECTED]
Abdulrahman Lomax
P.O. Box 690
El Verano, CA 95433
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