I need a board that is going to fit in a pre-manufactured “case” - and one corner need to be an inside corner.
http://dl.dropbox.com/u/2295566/r3v/pcb_corner.jpg
First question is how do they route inside corners? If I was a routing bit, I’d have a hard time making an inside corner that was square. What trick do they use to make the inside corners square?
Second question, anything special I need to do to my board layer outline?
I assume there are silly questions - so forgive me!
gg
Who are you planning on having manufacture your PCBs? They’re generally routed, but you have some options:
Just accept a rounded corner, based on the size of the minimum route bit available at your PCB house
Put a drill hole through the corner, so that you’ll get a hole in the corner, but it’ll fit a sharp corner if you need.
Manually the rounded corner to a straight corner (works well if you’re only doing a small number…)
Other people will likely have other methods they’ve used too, hopefully to get something ideally square. I’ve always gotten by with the drill hole in the corner trick since it’s cheap and easy. YMMV.
Regarding annotations, this will depend on your board house. I usually put a text call-out on a mechanical layer to bring my requirements to the Fab house’s attention and it’s worked well for me for large orders with various fab houses.
