Trying to create a touch pad

Jon galt wrote:

I am creating a library part for a touch pad for a Qprox sensor that uses X

and Y grid.  I only want traces on the top of the board, so that only the

pads(sensors) are visible on the bottom which is where the PCB will connect

to a graphic overlay.

 

 

The best trick I can think of is to use one regular pad shown in the center,

and a semi circle on the bottom layer shown on the outside. I used a smaller

pad to make a connection to the large semi circle, as I know3 of know way to

connect the symbol X to the senmi circle.  But, in my experience, when the

boards are made, there may not end up a connection here so that the small

pad actually touches the large semi circle.  I can't use a pad on top of a

pad.

 

Can anyone please tell me if this will actually work as drawn once it gets

to the board house?  If not, is there a simple solution to create the touch

sensor as needed?

 

Thanks for any suggestions

 

 

 

 

 

------------------------------------------------------------------------

 

One way to find out if your idea will work is to create a simple PCB

with your part.  Then run a CAM job to produce gerbers.  Finally use

GCPrevue or something similar to view the gerbers.

-Dave Pollum

Jon galt wrote:

I am creating a library part for a touch pad for a Qprox sensor that uses X

and Y grid.  I only want traces on the top of the board, so that only the

pads(sensors) are visible on the bottom which is where the PCB will connect

to a graphic overlay.

 

 

The best trick I can think of is to use one regular pad shown in the center,

and a semi circle on the bottom layer shown on the outside. I used a smaller

pad to make a connection to the large semi circle, as I know3 of know way to

connect the symbol X to the senmi circle.  But, in my experience, when the

boards are made, there may not end up a connection here so that the small

pad actually touches the large semi circle.  I can't use a pad on top of a

pad.

 

Can anyone please tell me if this will actually work as drawn once it gets

to the board house?  If not, is there a simple solution to create the touch

sensor as needed?

 

Thanks for any suggestions

 

 

 

 

 

------------------------------------------------------------------------

 

One way to find out if your idea will work is to create a simple PCB

with your part.  Then run a CAM job to produce gerbers.  Finally use

GCPrevue or something similar to view the gerbers.

-Dave Pollum