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Date: Wed, 25 Jul 2012 14:29:55 -0700
Message-ID: <CA+GuLwefxmvdSsYC5BwuhVhFjiffiG3LgwBU2q=+=5Zk7YwWkA@mail.gmail.com>
Subject: Re: [geda-user] how to use "clearance" and mask in pcb footprint
From: Ram Bhamidipaty <rambham AT gmail DOT com>
To: geda-user AT delorie DOT com
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Hi,

Thank you. I have seen the document - and in fact that was how I
managed to create
the footprint.

My real problem is that I am complete newbie in term of knowing how to
design a pcb.
What I do not know is how I am supposed to think about the clearance
and mask options?

The mask option seems simple - it just defines that area where the
solder mask will
have holes. What I don't know is how much of a hole is needed? Should
I just have the
solder mask line up with the edge of the pad/pin or should I have some
extra room? How
much extra room?

And clearance - I really have no idea what that means...

-Ram



On Thu, Jul 26, 2012 at 12:22 AM, Phil Taylor <phil AT plastitar DOT com> wrote:
> OOPS:
>
> On 7/26/2012 1:27 AM, Phil Taylor wrote:
>>
>> Ram,
>>
>> This document explains the clearance and mask numbers ... which are not
>> as obvious as you might at first think.
>
>
> http://www.brorson.com/gEDA/land_patterns_20070818.pdf