Making a PCB using a Laser Engraver Part Deux

I’ve made some changes to speed up the process for making power distribution boards for my multirotors. Basically I use a blue painters masking tape to cover the board and then use the laser to cut out the template.  After removing part of the blue mask I spray paint.

 

 

I start off with a double sided PCB copper clad blank

 

 

 

 

 

 

I mill and drill the board on the CNC as usual.

 

 

 

After some slight deburring of the copper at the edges I cover the board with high quality blue painters masking tape.

 

 

 

 

Then I use the laser to cut out a template in the blue mask.

 

 

 

 

 

Now that the mask is cut I can remove the part of the mask that I want to apply paint to

 

 

 

 

I give it a couple of light coats of Painters Touch flat black spray paint making sure all the copper is covered.

 

 

 

After the paint has had a chance to dry a bit I remove the blue tape to expose the copper I want to remove with ferric chloride.  I only let it dry for a couple of hours before etching.

 

 

 

Here it is after etching with the copper removed.

 

 

 

Next I remove the paint with acetone and a rag and then use some black electrical tape to cover the pads for where I want to solder the esc’s and power connections to.

 

 

 

Now it gets a coat of the black EZ liner Truck Bed Protector paint to insulate the copper.

 

 

 

Here it is with the esc’s soldered to the pads.  I use liquid insulator to cover the connections on the pads.  This board is for my new tricopter V2.  I’ll be putting a KK2 controller on it.