Etch your circuits the easy way — with a resist pattern you make on a vinyl cutter.
Here’s an easy technique to create a decent quality circuit board. You can design your own circuit traces, or you can find existing artwork of proven designs.
There lots of ways to etch a circuit board, but all of them create a path for the electricity by preserving and removing portions of the copper coating on the board. You might have tried drawing your circuit design on the copper with a pen or grease pencil, or silkscreen-printing it, or transferring toner from a laser printer — and then chemically etching the board. A substance used in this way is called a "resist" because it resists the etchant and protects the copper.
One of the easiest and most consistent methods I’ve found is to use adhesive-backed vinyl from a sign cutter to create the resist. You adhere your circuit trace image directly onto the board, and then immerse the board in a chemical bath. The exposed copper is removed, leaving just the copper traces you want for your circuit.