I'm attempting to use plated through slots on a double sided PCB for a micro HDMI connector. The connector uses slots to solder its shield to the PCB. The shield is connected to a portion of the PCB I've called the 'chassis' ground plane. This 'chassis' ground a poured copper plane is on layer 16 under the connector. It's separate from the ground plane on the rest of the top and bottom of the PCB as it's intended to create an EMI barrier.
I've created slots for the connector by drawing an outline on the milling layer 46. The slot is an oblong figure about 0.7mm wide by 1.3mm long with a 0.3mm annulus. However unlike pads or vias this figure doesn't have any electrical connectivity to either the top or bottom layers. Is there a way to add this? Or is there a way to create a pad to look like a slot?
So that there is some schematic connectivity to the shield I've placed pads within the slots but this does't give me a connection from the top to the bottom layer like a pad forming a plated through hole.
On the top layer I want to be able to take a track to the plated through slot and have it electrically connect though the plated slot to the chassis ground. I've not found a way to do this other than add vias but there really isn't any room for them and it seems a shame to have to add them just to get rid of airwires when I know the electrical connectivity I need will be made though the plated though slots.