Exactly what I have done on numerous occasions, seems to work fine.

Rob G

R`theta Electronics
 
Tel:    01209 820997
Mob: 07765807384
mailto: [EMAIL PROTECTED]
 


-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: 02 October 2007 13:38
To: [email protected]
Subject: Re: [PEDA] Mixing Surface mount and through hole in one
PCBcomponent.


You might want to search/review the PEDA archive. If I'm not mistaken, this
topic was discussed at some length about three or four years ago (perhaps a
bit longer) by quite a few people in the group who appeared to me at the
time to be "heavy hitters" in PCB layout/design...

>Browse or Search Old Archives (2001-2004): 
>http://www.mail-archive.com/[EMAIL PROTECTED]

FWIW, it has always seemed to me that a solution lies in the fact that a
surface mount pad is essentially just a fill. If it is acceptable for the
PCB routing to be dominated by the thru-hole pad, then loss of "pad" status
for the tandemed "virtual" surface mount pad would not be of any functional
merit. This means that one could create a component incorporating both
rule-based thru-hole pads and surface mount features (not single-layer
pads...) that functionally act as surface mount pads, then what's the harm?

regards,

aj

"The inside's bigger than the outside"
- Dr Who

>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf Of John Dammeyer
>Sent: Monday, October 01, 2007 11:40 PM
>To: 'Protel EDA Discussion List'
>Subject: [PEDA] Mixing Surface mount and through hole in one 
>PCB component.
>
>I'm trying to make a circuit board with pushbutton switches
>universal enough so it can use either a through whole switch 
>pattern or a surface mount one.  The four through hole pads 
>fit nicely outside the surface mount pattern. I've labelled 
>each of the pairs designators the same so I have a round 
>through hole with a designator 1 and a surface mount with designator 1.
>
>However, it seems Protel 99SE has problems with two pads with
>the same designator. 

 
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