[PCB_FORUM] Re: same net rules

        Just reading this email and also have never seen this rule
before.
        What is the function of the soldermask alignment drc? 

        Mike 

-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of westfeldt
Sent: Saturday, January 20, 2007 7:18 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: same net rules

Thank you Robert.  I can't believe I have never seen that one in there.
Using "sm to sm" works for via to smd.  Also a pleasant surprise, this
does
not give me drc's where I allow a soldermask shape to cover over pads
that
already have soldermasks.  I'm guessing this rule will show up with
occasional bogus drc's, but nowhere near as bad as if I pushed the same
net
button. 

Patrick

-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Robert
Szumowicz
Sent: Tuesday, January 09, 2007 1:10 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: same net rules

Patrick,
I think it is available even in a lower tool than Performance:
setup-> constrains->design constrains->soldermask to soldermask

Dave,
they do if same net DRC is switched on, but:
 - I cannot assign different values for 'same net' and 'different net'
 - I see occasionally unwanted and annoying DRCs 'Line to Line Spacing' 
when clines overlaps (intentionally)

Robert


westfeldt wrote:
> Soldermask to soldermask might work, but I don't know how to set it, 
> is that available in Performance option?
>
> -----Original Message-----
> From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Robert 
> Szumowicz
> Sent: Friday, January 19, 2007 8:24 AM
> To: icu-pcb-forum@xxxxxxxxxxxxx
> Subject: [PCB_FORUM] Re: same net rules
>
> Hi all,
>
> I think I do understand the question since I also miss such feature.
>
> Problem stated:
>  - to not to have Via too close to SMD pin
>
> Partial Solution:
>  - enable same net DRC (problem is that it checks all other rules and 
> often creates many unwanted DRCs)
>
> Other possibility
>  - set a rule for "Solder mask to Solder mask" spacing assuming that 
> Vias are not covered (problem is that this is one global rule for a 
> whole design)
>
> regards,
> Robert
>
>
> Macindoe, Gary wrote:
>   
>> Hey Pat,
>>
>> Not exactly sure what you are asking here.  Need a little
clarification!
>>  
>> Gary E. MacIndoe
>> Advanced Micro Devices
>> PCB Design Engineer
>> Longmont, Colorado
>>
>> -----Original Message-----
>> From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
>> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of westfeldt
>> Sent: Friday, January 19, 2007 6:43 AM
>> To: icu-pcb-forum@xxxxxxxxxxxxx
>> Subject: [PCB_FORUM] same net rules
>>
>> Is there no way in Allegro to have the same net rules apply only to 
>> certain rules?  The one I always need is via to smd pin, but I would 
>> not want all the rest of the rules to have same net application.
>>
>> Patrick Westfeldt, Jr.
>> North Boulder Circuit Design
>> westfeldt_nbcd@xxxxxxxxx
>> 720-406-0887
>> c 720-272-5822
>>
>>
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>>   
>>     
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