If you’ve done any PCB etching at home, chances are pretty good that you’ve at least tried the old standby, ferric chloride. It’s cheap and easy, and has a lot of advantages over other wet ...

The copper which is not protected by an etch resist is removed by the etching process. The following are the commonly used etching methods: Ferric chloride etching solutions are widely used in the ...

Another common etchant is ammonium or sodium persulphate ... He also used the same materials (along with some others) to make ferric chloride successfully. Even then, it is a good example of ...

The most common etching systems are based on alkaline ammonia and cupric chloride. Other systems include peroxide-sulfuric acid, persulfates, and ferric chloride. Process steps include resist ...