How to route a VHDCI connector?

[m1tch37]

Hi,

I am trying to design a prototype pcb with a VHDCI connector on it: https://www.electro-tech-online.com/custompdfs/2011/06/71046.pdf

I have designed the footprint and confirmed it accurate, but my issue is how I can possibly connect all the traces; the thing is so small!

My PCB fab has minimum trace width of 6mil and minimum clearance of 6mil, but with these restrictions I feel I have no hope routing all the pins. This is where I get stuck:

**broken link removed**

Given most people would want the connector on the edge, its not really possible to loop the other 34 pins around the sides.

I know no one here may have experience with this specific connector, but does anyone have any ideas? I have PCBs in front of me with a VHDCI connector right on the edge and all the pins routed; how do they do it? What can I do to wire this thing up?

Thanks,
Mitch

 

[crutschow]

You need at least a two layer board and route the remaining pins on the other layer.

 

[m1tch37]

The connector is through hole. I do have a 2 layer board, but I don't see how an extra layer helps you when you can't fit a route between two pins.

 

[ronsimpson]

Change the pads on your "foot print".
1.) Keep the drill hole the same size but decrease the size of the copper.
2.) Make the pads not round but oblong.

 

[Ian Rogers]

You can nearly do it with single sided..

Sorry missed the bit about getting to the edge.

However using top layer will do it easily

 

[crutschow]

The connector is through hole. I do have a 2 layer board, but I don't see how an extra layer helps you when you can't fit a route between two pins.

There is .8mm (31mil) spacing between pins. Thus you can have a 6mil pad annulus on each pin, 6mil spacing, a 6mil trace between pins, and still have 1 mil to spare.