Hello everybody. How to make a similar plug on the board circled in red in Eagle cad? And how to make such a board size circled in blue. Thank you.
Hello everybody. How to make a similar plug on the board circled in red in Eagle cad? And how to make such a board size circled in blue. Thank you.
Hi Morten,
There are some issues you also need to take care of, and Eagle is not
helping much. They need to be specified to the manufacturer next to the
gerbers.
You are right, special care needs to be taken to ensure that the board manufacturer sees and acts upon the additional information. Is there a standard way other tools do this that you know of? I've only ever seen notes added to drawings which are printed and supplied as part of the gerber set... But I have seen those completely ignored previously so you have to work especially hard to ensure that your board house really has paid attention to any additional information supplied.
1-Make sure the PCB thickness is matching your socket (Yea, I've managed
to mess up this once!). If it's 1.6mm, you have a great chance of
accidentially getting it right.
That's a very good point, I guess lots of people learn that lesson the hard way.... In fact I will be designing a board with a card edge soon so I will make a note of that now so I don't forget and have a stupid fail on the first prototype! 
2-The card edge needs beveling (v'shape) to be gentle to the receptor.
See datasheet of the receptor for recommendations.
3-The contacts need special coating to prevent oxidation. Normally this
is done in production by shorting all the pins before final cutout,
applying a voltage to them all while the edge of the pcb is dipped into
some chemical for coating deposit, then the shorts are cut out and
beveling applied. You can often see the thin tracks that used to short
circuit all the pins as leftover on the wider pads.
These are the two things I mentioned in my post, but I probably wasn't clear enough about the gold plating. So, the process you refer to is actually to produce a harder gold plating for the connector fingers rather than the softer plating you get when you have a typical gold finished board. It's not about a surface to protect from oxidation, its so it's mechanically strong enough surface that it can withstand insertion into the edge connector socket without damaging the surface. I didn't actually know how it was done and that extra shorting traces were required which were then removed as part of the bevelling. Very useful info, thanks 
Also see http://www.eurocircuits.com/blog/gold-plating-for-edge-connectors/
Ahhh, Eurocircuits, my go to board house for prototype boards. I've bookmarked that link for my upcoming project. Thanks
Best Regards,
Rachael
