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Making a Donut Pad Shape in Allegro

Printed From: PCB Libraries Forum
Category: Training / Events
Forum Name: PCB Design Basics
Forum Description:
URL: http://www.PCBLibraries.com/forum/forum_posts.asp?TID=1141
Printed Date: 06 Dec 2022 at 8:59pm


Topic: Making a Donut Pad Shape in Allegro
Posted By: Kenny_kc
Subject: Making a Donut Pad Shape in Allegro
Date Posted: 21 Oct 2013 at 6:23am
Hello All,
 
I am beginner in Allegro so I need your help.
 
Can anyone tell me how to make a Donut Pad Shape in Allegro?
 
The Donut Pad Shape is where the inner part of pad there is no copper material so I can place another pad inside the Donut Pad.
 
So if anybody knows how to do this then please tell me. It's very urgent. 
 
Thanks
 



Replies:
Posted By: Romeo.C.
Date Posted: 24 Oct 2013 at 5:33am

How do I create a pad with a void inside it?

 

1. Open a dra file for a package and move the origin somewhere to the center

2. Draw two circles in the Assembly Detail subclass at x,y ( 0, 0 ) representing the inner and outer extends of the donut. These are for construction purpose.

3. Set the grid to a small value such as .0005mm.

4. Using Add > 3pt Arc create a circle on the Etch Top subclass.  The first and second picks are each one grid point off the 12 o’clock zero X-axis on the outer circle.
The 3rd pick is at the 6 o’clock zero X grid location of the outer circle.

This is repeated for the inner circle.

5. Now add two vertical lines connecting the first picks and then the second picks.

6. Then, delete the two circles on the Assembly Detail subclass.

7. Go to Shape > Compose Shape

Click Right Mouse button and select Temp Group.  Pick both of the arcs and the lines, then click right mouse button and select Complete.

Right mouse click and select Done.

8. Now select Setup > Design Parameters and on the 'Design' tab set the Drawing Type to Shape. Ok out of the form and the Save this shape symbol file

This can now be called into the padstack where needed.

 

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Document attributes

Solution ID:

11776508

Created:

02/16/2012 09:35:29

Last Modified:

02/24/2012 02:21:40

Product:

Allegro PCB Editor

Product Version:

Not Appropriate

HW Platform:

 

O/S Version:

 

SW Release:

 

 



Posted By: mareespcb2
Date Posted: 08 Mar 2017 at 12:36am
Dear Romeo,

How do I create a pad with a void inside it?

I followed your comments but error is showing on.

first one is

ERROR(SPMHA1-98): Illegal element class. 80151928 SHAPE @80151928

now I have deleted board geometry/ assembly notes then save the dra file again another is showing on.

ERROR(SPMHCS-3): Shape symbol cannot have a void in a shape. 83559776

Thanks for the advance

Mareeswaran k



Posted By: Romeo.C.
Date Posted: 13 Mar 2017 at 5:11am
Hello
that's strange, I was able to create a donut pad without problems following exactly the steps as follows below.

After that you need to associate the new shape (*.dra, *.ssm) into the padstack editor with regular pad / geometry "shape" and browes ... selecting the new shape symbol.

Kind regards  Romeo 
Steps
1. Open a dra file for a package and move the origin somewhere to the center
2. Draw two circles in the Assembly Detail subclass at x,y ( 0, 0 ) representing the inner and outer extends of the donut. These are for construction purpose.
3. Set the grid to a small value such as .0005mm.
4. Using Add > 3pt Arc create a circle on the Etch Top subclass.  The first and second picks are each one grid point off the 12 o’clock zero X-axis on the outer circle.
The 3rd pick is at the 6 o’clock zero X grid location of the outer circle.
This is repeated for the inner circle.
5. Now add two vertical lines connecting the first picks and then the second picks.
6. Then, delete the two circles on the Assembly Detail subclass.
7. Go to Shape > Compose Shape
Click Right Mouse button and select Temp Group.  Pick both of the arcs and the lines, then click right mouse button and select Complete.
Right mouse click and select Done.
8. Now select Setup > Design Parameters and on the 'Design' tab set the Drawing Type to Shape. Ok out of the form and the Save this shape symbol file
This can now be called into the padstack where needed.
 
 
 
 
 

 




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