Hi everyone, been lurking here a while and have a question on Eagle - I looked but couldn’t find this one.
I’m designing a board that uses PQFN 5x6 MosFETs (Infineon’s BSC123), the package doesn’t seem to exist in the Eagle libraries - or have I just missed it?
I am working on creating my own package (which I have done before) but what’s not clear to me is how to do the polygon as outlined in red on the picture. I know that you can make multiple pins attach to the same schematic point so pins 5-8 are the drain, but when I add that polygon then how does Eagle know what it’s supposed to connect to and won’t it give me error messages or try to keep a gap between the pins and the polygon?
Thanks in advance for any help on this. If I have to build it myself, I’ll share into the Sparkfun library.
Ted
I think the best way to do it would be to place a pad which equals the total size of the 4 pads and the polygon and get drawing the solder mask with the polygon tool…
Thats what has been done in that picture.
FartingMonkey92:
I think the best way to do it would be to place a pad which equals the total size of the 4 pads and the polygon and get drawing the solder mask with the polygon tool…
Thats what has been done in that picture.
Thanks for the fast response; I understand the first bit but not the second bit "get drawing the solder mask with the polygon tool"; are you saying that you can alter the shape of the large pad using the polygon tool?
[Edit] Duh, I just looked at the picture and now I see what you mean, you can clearly see the green under the solder mask. I was going to (try to) make a prototype board without soldering mask but that may prove a bit difficult.
Yup, thats the only way i can see it working correctly, if you used 4 pads and another the size of the polygon, you would get overlap errors in the board DRC…
Got it as far as the picture. The outline is drawn on 27 tnames - is that correct?
I made the tStop layer visible and I see the polygons shown but I can’t figure out how to change the size of the solder mask polygon or add extras.
Can someone please put me out of my misery?
Looking good! But, you want the outline on layer 21 “tPlace”.
And the stop mask, you can use the info tool on a pad, unselect “Stop” and then draw your own.
You may also need to draw “tCream” the same way as the stop mask if you were getting your boards assembled.
