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Isolation gap between power planes?

autodeskguest

Hi,

 

is there a way to increase the isolation gap between the two adjacent

power planes/polygons but NOT to increase the isolation gap between the

polygon and the traces/pads inside the power plane?

 

Here is the picture:

 

https://www.dropbox.com/s/rsf9r3tvz3wz5wj/power_planes.png

 

Please note, this picture is only to demonstrate the problem(s), it was

not intended to represent the actual traces.

 

As you can see there are two power planes (7V and 5V power plane). The

outer power plane (5V) is of the rank 2 and the inner one (7V) is of

the rank 1. The isolation parameter for both polygons is 0.012 and that

is the width of the gap (marked by arrows).

 

What I would like to do is to increase the gap between 5V and 7V

polygons but to keep the isolation of 0.012 between the power plane and

its inside (traces, pads, vias, ...) but didn't find how I could do

what I described.

 

And one more question - as you can see, despite having the 7V power

plane in the top layer of the PCB the autorouter did not connect the 7V

pad to that power plane but it rather connected it using the trace in

the bottom layer and making a via (making the 7V plane useless). How

can I force the autorouter to connect that particular pad to the power

plane in the top layer? I know I could manually route that trace in the

top layer before starting the autorouter but would like to know if

there is a way to force the autorouter to use the power plane in the

top layer for that particular pad.

--

Let There Be Light

Custom LED driveri prema specifikacijama

http://tinyurl.com/customleddriver

 

Chupo

 

  • In article <ng0dgq$faf$1@baboon.cadsoft.de>, warrenbrayshaw

    <warrenbrayshaw@paradise.net.nz> says...

    Hi

    If by 'forum' you are referring to 'EagleCentral'

     

     

    Yes, that is what I thought.

     

     

    you will see there

    that your 'Real Name:' is listed as AM2

     

    Log into EagleCentral and there, in the Control Panel, change your real

    name.

     

    Perhaps its matching on your email address

     

     

    Interesting, for the moment I thought the name could be matched on my

    email address but I didn't remember if I've ever used forum access

    instead of the news server so I checked old emails to find the

    confirmation/subscribtion email(s) but I didn't find any and then I

    concluded I never used the forum image

     

    Moreover, I did not find any Eaglecentral account data in my account DB

    files so I find to still be a mystery if/when I registered image I'll try

    to find the acc data in some more unusual places on my backup discs.

     

    Thank you for your reply.

    --

    Let There Be Light

    Custom LED driveri prema specifikacijama

    http://tinyurl.com/customleddriver

     

    Chupo

     

  • On 30/04/2016 2:54 a.m., Chupo wrote:

    In article <nfvr9c$392$1@baboon.cadsoft.de>, Tilmann Reh

    <usenet2007nospam@autometer.de> says...

    HELP CLASS

     

     

    Thank you very much! So I have to make a new class and assign it to the

    inner ground plane and then define the clearance between the default

    class (0) and the new one. I will examine how it could be done.

     

    BTW, I posted this message to the cadsoft newsgroup with the news

    reader and then found it posted on forum as well but the displayed name

    is the name of the computer and not the name set in the newreader

    posting options - do you maybe know how is that possible? I don't see

    the name of the computer anywhere in the headers of the messages posted

    to the newsgroups and, still, it is displayed by the forum engine!?

     

     

    Hi

    If by 'forum' you are referring to 'EagleCentral' you will see there

    that your 'Real Name:' is listed as AM2

     

    Log into EagleCentral and there, in the Control Panel, change your real

    name.

     

    Perhaps its matching on your email address

     

    HTH

    Warren

     

     

  • And one more question - as you can see, despite having the 7V power

    plane in the top layer of the PCB the autorouter did not connect the 7V

    pad to that power plane but it rather connected it using the trace in

    the bottom layer and making a via (making the 7V plane useless).

     

     

    Please ignore this part of the question - the problem was I misspeled

    the name of the signal (V7 instead of 7V).

     

    The CLASS solved the problem with the gap between polygons.

    --

    Let There Be Light

    Custom LED driveri prema specifikacijama

    http://tinyurl.com/customleddriver

     

    Chupo

     

  • In article <nfvr9c$392$1@baboon.cadsoft.de>, Tilmann Reh

    <usenet2007nospam@autometer.de> says...

    HELP CLASS

     

     

    Thank you very much! So I have to make a new class and assign it to the

    inner ground plane and then define the clearance between the default

    class (0) and the new one. I will examine how it could be done.

     

    BTW, I posted this message to the cadsoft newsgroup with the news

    reader and then found it posted on forum as well but the displayed name

    is the name of the computer and not the name set in the newreader

    posting options - do you maybe know how is that possible? I don't see

    the name of the computer anywhere in the headers of the messages posted

    to the newsgroups and, still, it is displayed by the forum engine!?

    --

    Let There Be Light

    Custom LED driveri prema specifikacijama

    http://tinyurl.com/customleddriver

     

    Chupo

     

  • Chupo schrieb:

     

    is there a way to increase the isolation gap between the two adjacent

    power planes/polygons but NOT to increase the isolation gap between the

    polygon and the traces/pads inside the power plane?

     

    HELP CLASS

     

    Tilmann