PCB - Will Toner Transfer Work?

Community PCB Design
1

Hey all,

I need this PCB for a LQFP208 breakout board.

I have done the layout, and was wondering if this board would be doable using the toner transfer method.

Attached is an image of the tracks. The final size is 200*200mm.

My final plan is to attach 4 breadboards to the outside of it, allowing for quick and easy prototyping (since I’m still fairly new to ARM processors.

I know that having the crystal that far away is risky, and if it won’t work, I’ll have to add a place on the PCB for the crystal and cap’s.

Image:

http://www.picturebay.net/img/guests/60 … eakout.png

Thanks.

2

TT might work, if you have the knack. I wouldn’t have any problems making that at home with the photo-etch process.

Leon

3

When you do TT always remember:

  1. Make the traces as thick as you could:

Your not going to get an exact width, a bit extra is always good. It makes it easier to repair with a Sharpie.

  1. Spread out your traces as much as you could:

Viscosity is not your friend, if you place 2 traces really close together the liquid will have a hard time etching out the copper between them.

Lastly it might be my imagination, but the spacing between the traces seem a lot smaller once the transfer is done.

  1. Use the following etchent http://www.instructables.com/id/EFVWDTSLWYEV2Z8QB1/

If you make the starter etchent (clear in color. it will eat copper like crazy. I have way more luck with this stuff then I do with FeCL. And its environmentally friendly :slight_smile:

4: Minimize etching time:

the more copper you eat the more etchent your gonna need to maintain to keep a good etch rate, so don’t be afraid to add pads around the blank areas to reduce the amount of copper you need to remove.