I have a TO-220 voltage regulator on my board, and it will be mounted flat, and screwed down onto the board. I would like to use the board itself as a heat sink. How should I go about this?
My plan was for the screw to attach it to the ground layer on the other side of the board. But the part outline I used has a keepout region which the ratsnest routed around. So I added a rectangle of copper to my bottom layer around the hole which filled it in. I then placed another rectangle on the bStop layer which I think stops the solder mask from being poured there. So now I should have a bare copper square around the hole for the screw.
Would you say this is the correct way to go about it? Or do I need a grounded copper layer on the top as well?
Also, is simply bolting the TO-220 down sufficient, or will I get next to nothing out of doing that alone?
Btw, when I say sufficient, I mean ideal. I don't think my regulator even gets hot because it's not used to anywhere near it's full potential 99% of the time. I'm asking this mostly because I'm interested in knowing the right way to go about it. I couldn't find much on google about it.