Protel99SE - no vias at pads

[Christoph]

hi!
can anybody tell me, where i can define in protel99se, that the
autorouter places no vias at pads?
i´d like to design a 2-layer layout to solder by hand. so there must
not be vias directly at pads of components. because i can´t solder
them on the toplayer...

many thanks in advance!!

 

[Peter Bennett]

On 7 Feb 2006 02:41:32 -0800, "Christoph" <graf_christoph@gmx.at>
wrote:

hi!
can anybody tell me, where i can define in protel99se, that the
autorouter places no vias at pads?

In my experience, Protel does not place vias in pads - any CAD system
that did would be seriously flawed.

i´d like to design a 2-layer layout to solder by hand. so there must
not be vias directly at pads of components. because i can´t solder
them on the toplayer...

You can create your own component footprints that have pads only on
the bottom layer - then the autorouter will be forced to connect to
them on the bottom layer.

(By the way - you can route your board manually if you wish - then you
have full control of how you connect to component pads, and where vias
are placed.)

many thanks in advance!!

--
Peter Bennett VE7CEI
email: peterbb4 (at) interchange.ubc.ca
GPS and NMEA info and programs: http://vancouver-webpages.com/peter/index.html
Newsgroup new user info: http://vancouver-webpages.com/nnq

 

[Joel Kolstad]

"Peter Bennett" <peterbb@nowhere.invalid> wrote in message
news:7qnhu15t5upcb0neqvjhee39rqohpj792i@4ax.com...

In my experience, Protel does not place vias in pads - any CAD system
that did would be seriously flawed.

This isn't true. There are plenty of PCB manufacturers and board builders out
there who are perfectly capable of dealing with "via in pad" designs; being
able to utilize such a feature can produce noticeable improvements in signal
integirty as well as board density.

That being said, I've never seen a PCB system that couldn't be set to keep
vias out of pads, since it is the more traditional/lower tech way of doing
things.

 

[Pooh Bear]

Christoph wrote:

hi!
can anybody tell me, where i can define in protel99se, that the
autorouter places no vias at pads?

You mean you don't want a PTH don't you ?

Graham

 

[Christoph]

thanks, for your answers...!

okay - to create footprints without "toplayer-pads" - that would be an
idea!

@graham: no, i´d like to create a PTH